0001564590-22-009695 | 10-K | XBRL Viewer

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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash	$ 238,480	$ 9,629
Accounts receivable, net of allowances	110,739	89,767
Prepaid expenses and other current assets	2,967	4,487
Total current assets	352,186	103,883
Property, equipment, and software, net	22,331	13,829
Intangible assets, net	1,786	3,015
Goodwill	12,422	12,422
Other assets	406	371
Total assets	389,131	133,520
Current liabilities:
Accounts payable	32,877	29,763
Accrued liabilities	34,086	24,677
Accrued compensation	12,247	9,711
Current portion of long-term debt		3,353
Current portion of deferred revenue	1,317	2,725
Accrued member tax distributions	5	6,878
Other current liabilities	2,526	2,549
Total current liabilities	83,058	79,656
Long-term debt	17,500	20,182
Long-term portion of deferred revenue	5,234	5,612
Other long-term liabilities	765	453
Total liabilities	106,557	105,903
Commitments and contingencies (Note 13)
Convertible preferred units
2019 convertible preferred units, no par value; none issued and outstanding as of December 31, 2021 and 600,000 units authorized, issued and outstanding as of December 31, 2020; liquidation preference $5,444 as of December 31, 2020		7,500
Members' equity
Additional paid-in capital		92,187
Accumulated deficit		(72,070)
Stockholders’ equity
Preferred stock, $0.001 par value, 10,000,000 shares authorized, none issued and outstanding as of December 31, 2021
Additional paid-in capital	82,888
Accumulated deficit	(20,139)
Treasury stock, at cost; 216,230 shares as of December 31, 2021	(2,648)
Total stockholders' equity attributable to Viant Technology Inc./members' equity	60,162	20,117
Noncontrolling interests	222,412
Total equity	282,574	20,117
Total liabilities, convertible preferred units and stockholders' equity/members' equity	389,131	$ 133,520
Class A Common Stock
Stockholders’ equity
Common stock	14
Class B Common Stock
Stockholders’ equity
Common stock	$ 47

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Common units no par value		$ 0
Common units, units authorized		400,000
Common units, units issued	0	400,000
Common units, units outstanding	0	400,000
Preferred stock, par value per share	$ 0.001
Preferred stock, shares authorized	10,000,000
Preferred stock, shares issued	0
Preferred stock, shares outstanding	0
Treasury stock, shares	216,230
2019 Convertible Preferred Units
Convertible preferred units, no par value		$ 0
Convertible preferred units, units authorized		600,000
Convertible preferred units, units issued	0	600,000
Convertible preferred units, units outstanding	0	600,000
Convertible preferred units, liquidation preference		$ 5,444
Class A Common Stock
Common stock, par value per share	$ 0.001
Common stock, shares authorized	450,000,000
Common stock, shares issued	13,920,868
Common stock, shares outstanding	13,704,638
Class B Common Stock
Common stock, par value per share	$ 0.001
Common stock, shares authorized	150,000,000
Common stock, shares issued	47,107,130
Common stock, shares outstanding	47,107,130

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 224,127	$ 165,251	$ 164,892
Operating expenses:
Platform operations	129,604	88,260	94,060
Sales and marketing	65,042	28,887	29,027
Technology and development	25,372	8,698	9,240
General and administrative	46,904	17,639	19,770
Total operating expenses	266,922	143,484	152,097
Income (loss) from operations	(42,795)	21,767	12,795
Interest expense, net	864	1,038	3,948
Other expense (income), net	60	91	(1,077)
Gain on extinguishment of debt	(6,110)
Total other expense (income), net	(5,186)	1,129	2,871
Net income (loss)	(37,609)	$ 20,638	$ 9,924
Less: Net loss attributable to noncontrolling interests	(29,867)
Net loss attributable to Viant Technology Inc.	$ (7,742)
Earnings (loss) per Class A common stock/unit:
Basic	$ (0.63)	$ 20.64	$ 31.31
Diluted	$ (0.63)	$ 20.64	$ 27.37
Weighted-average Class A common stock/units outstanding:
Basic	12,364	400	274
Diluted	12,364	1,000	1,000

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income (loss)	$ (37,609)	$ 20,638	$ 9,924
Other comprehensive income (loss):
Foreign currency translation adjustments			19
Total other comprehensive income (loss)			19
Comprehensive income (loss)	(37,609)	20,638	9,943
Viant Technology Inc
Net income (loss)	(7,742)
Other comprehensive income (loss):
Comprehensive income (loss)	(7,742)
Non-controlling Interest
Net income (loss)	(29,867)	20,638	9,924
Other comprehensive income (loss):
Foreign currency translation adjustments			19
Total other comprehensive income (loss)			19
Comprehensive income (loss)	$ (29,867)	$ 20,638	$ 9,943

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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+ Details

CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED UNITS AND EQUITY (DEFICIT) - USD ($) shares in Thousands, $ in Thousands	Total	Convertible Preferred Units	Common Units	Common Units Class A Common Stock	Common Units Class B Common Stock	Additional Paid-in Capital	Accumulated Deficit	Members' Equity	Treasury Stock	Non-controlling Interest
Temporary Equity, Balance at Dec. 31, 2018		$ 45,000
Temporary Equity, Balance, Share at Dec. 31, 2018		600
Balance at Dec. 31, 2018	$ (83,197)							$ (83,197)
Balance, Shares at Dec. 31, 2018			240
Unit-based compensation	1,090							1,090
Vesting of common units			160
Foreign currency translation adjustments	19							19
Retirement of 2016 convertible preferred units held by related party	45,000							45,000
Temporary Equity Retirement of Convertible Preferred Units Shares Held by Related Party, Shares		(600)
Temporary Equity, Retirement of 2016 convertible preferred units held by related party		$ (45,000)
Forgiveness of long-term debt and accrued interest with related party, net of transaction costs	44,069							44,069
Temporary Equity Issuance of 2019 convertible preferred units to a related party, Shares		600
Temporary Equity Issuance of 2019 convertible preferred units to a related party		$ 7,500
Beneficial conversion feature on 2019 convertible preferred units	27,558							27,558
Deemed dividend related to beneficial conversion feature on 2019 convertible preferred units	(27,558)							(27,558)
Accrued member tax distributions	(1,700)							(1,700)
Net income (loss)	9,924							9,924		$ 9,924
Temporary Equity, Balance at Dec. 31, 2019		$ 7,500
Temporary Equity, Balance, Share at Dec. 31, 2019		600
Balance at Dec. 31, 2019	15,205							15,205
Balance, Shares at Dec. 31, 2019			400
Accrued member tax distributions	(10,726)							(10,726)
Member dividends	(5,000)							(5,000)
Net income (loss)	20,638							20,638		20,638
Temporary Equity, Balance at Dec. 31, 2020		$ 7,500
Temporary Equity, Balance, Share at Dec. 31, 2020		600
Balance at Dec. 31, 2020	20,117							20,117
Balance, Shares at Dec. 31, 2020			400
Net income prior to Reorganization TransactIons	669							669
Effect of Reorganization Transactions	7,500				$ 49	$ 28,237		$ (20,786)
Temporary Equity, Effect of Reorganization Transactions, Shares		(600)	(400)
Temporary Equity, Effect of Reorganization Transactions		$ (7,500)
Effect of Reorganization Transactions, Shares					48,936
Issuance of Class A common stock in initial public offering, net of underwriting and offering costs	228,185			$ 12	$ (2)	228,175
Issuance of Class A common stock in initial public offering, net of underwriting and offering costs, Shares				11,500	(1,500)
Exchange of Class B common stock for Class A common stock, Shares				329	(329)
Issuance of common stock in connection with equity-based compensation plans				$ 2		(2)
Issuance of common stock in connection with equity-based compensation plans, Shares				2,092
Repurchase of treasury shares in connection with the taxes paid related to net share settlement of equity awards	(15,045)								$ (15,045)
Repurchase of treasury shares in connection with the taxes paid related to net share settlement of equity awards, Shares									(915)
Reissuance of treasury stock in connection with equity-based compensation plans							$ (12,397)		$ 12,397
Reissuance of treasury stock in connection with equity-based compensation plans, Shares									699
Allocation of equity to noncontrolling interests						(252,948)				252,948
Accrued member tax distributions	(413)					(413)
Stock-based compensation	79,839					79,839
Net loss subsequent to Reorganization Transactions	(38,278)						(7,742)			(30,536)
Net income (loss)	(37,609)									(29,867)
Balance at Dec. 31, 2021	$ 282,574			$ 14	$ 47	$ 82,888	$ (20,139)		$ (2,648)	$ 222,412
Balance, Shares at Dec. 31, 2021				13,921	47,107				(216)

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ (37,609)	$ 20,638	$ 9,924
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	11,141	10,106	10,155
Stock/Unit-based compensation	68,822		1,090
Provision for (recovery of) doubtful accounts	(107)	(584)	613
Loss on disposal of assets	188	61	13
Gain on extinguishment of debt	(6,110)
Changes in operating assets and liabilities:
Accounts receivable	(20,865)	(21,099)	(20,200)
Prepaid expenses and other assets	(750)	(252)	(467)
Accounts payable	3,404	8,995	2,745
Accrued liabilities	9,728	1,736	15,827
Accrued compensation	2,319	1,323	(1,107)
Deferred revenue	(1,786)	(1,694)	(4,607)
Other liabilities	290	(355)	(953)
Net cash provided by operating activities	28,665	18,875	13,033
Cash flows from investing activities:
Purchases of property and equipment	(441)	(434)	(423)
Capitalized software development costs	(6,931)	(7,407)	(7,390)
Net cash used in investing activities	(7,372)	(7,841)	(7,813)
Cash flows from financing activities:
Proceeds from borrowings on line of credit			17,500
Proceeds from borrowings on debt with related party			500
Proceeds from Paycheck Protection Program Loan		6,035
Repayments of debt with related party			(25,000)
Proceeds from issuance of 2019 convertible preferred units to a related party			7,500
Transaction costs paid on behalf of related party			(3,561)
Proceeds from issuance of common stock, net of underwriting discounts	232,500
Payment of member tax distributions	(7,289)	(5,547)
Payment of member dividends		(5,000)
Payment of offering costs	(2,608)	(1,708)
Taxes paid related to net share settlement of equity awards	(15,045)
Net cash provided by (used in) financing activities	207,558	(6,220)	(3,061)
Effect of exchange rate changes on cash			1
Net increase in cash	228,851	4,814	2,160
Cash at beginning of period	9,629	4,815	2,655
Cash at end of period	238,480	9,629	4,815
Supplemental disclosure of cash flow information:
Cash paid for interest	660	1,065	12
Supplemental disclosure of non-cash investing and financing activities:
Additions of property and equipment paid by landlord pursuant to tenant improvement allowance			355
Retirement of 2016 convertible preferred units held by related party			45,000
Forgiveness of long-term debt and accrued interest by related party			47,630
Beneficial conversion feature and deemed dividend related to 2019 convertible preferred units			27,558
Accrued member tax distributions	5	6,878	$ 1,700
Deferred offering costs recorded in accounts payable and accrued liabilities		$ 529
Stock-based compensation included in capitalized software development costs	11,017
Capitalized assets financed by accounts payable and accrued liabilities	356
Noncash gain on extinguishment of debt related to Paycheck Protection Program loan	$ 6,110

Nature of Operations

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Nature of Operations

1. Nature of Operations

Viant Technology Inc. (the “Company,” “we,” “us,” “our” or “Viant”) was incorporated in the State of Delaware on October 9, 2020 for the purpose of facilitating an Initial Public Offering (“IPO”) and other related transactions. The Company operates a demand side platform (“DSP”), Adelphic, an enterprise software platform that is used by marketers and their advertising agencies to centralize the planning, buying and measurement of their advertising across channels, including desktop, mobile, connected TV, linear TV, in-game, streaming audio and digital billboards.

On February 9, 2021, the Securities and Exchange Commission (“SEC”) declared effective the Company’s Form S-1 related to the IPO of its Class A common stock. The closing date of the IPO was February 12, 2021, and in connection with the closing and the corporate reorganization (the “Reorganization Transactions”), the following actions were taken:

•

The Company amended and restated its certificate of incorporation, under which the Company is authorized to issue up to 450,000,000 shares of Class A common stock, up to 150,000,000 shares of Class B common stock, and up to 10,000,000 shares of preferred stock;

•

The limited liability company agreement of Viant Technology LLC was amended and restated (as amended and restated, the “Viant Technology LLC Agreement”) to, among other things, provide for Class A units and Class B units and appoint the Company as the sole managing member of Viant Technology LLC;

•

The Viant Technology LLC Agreement classified the interests acquired by the Company as Class A units, reclassified the interests held by the continuing members of Viant Technology LLC as Class B units, and permits the continuing members of Viant Technology LLC to exchange Class B units for shares of Class A common stock on a one-for-one basis or, at the election of Viant Technology Inc., for cash at the current fair value on the date of the exchange. Immediately following such reclassification, the continuing members held 48,935,559 Class B units. For each membership unit of Viant Technology LLC that was reclassified as a Class B unit, the Company issued one corresponding share of our Class B common stock to the continuing members, or 48,935,559 shares of Class B common stock in total;

•

The Company issued and sold 10,000,000 shares of its Class A common stock to the underwriters at an IPO price of $25.00 per share, for gross proceeds of $250.0 million before deducting underwriting discounts and commissions of $17.5 million;

•

The Company used the net proceeds of $232.5 million to acquire 10,000,000 newly issued Class A units of Viant Technology LLC at a per-unit price equal to the per-share price paid by the underwriters for shares of our Class A common stock;

•

The underwriters exercised their option to purchase 1,500,000 additional shares of Class A common stock from the selling stockholders. The Company did not receive any proceeds from the sale of shares by the selling stockholders. Pursuant to such exercise, the selling stockholders exchanged the corresponding number of Class B units for the shares of Class A common stock, the corresponding number of shares of Class B common stock were automatically retired, and 1,500,000 Class A units were issued to the Company;

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The Class B stockholders and Class A stockholders initially had 80.5% and 19.5%, respectively, of the combined voting power of the Company’s common stock. The Class A common stock outstanding represents 100% of the rights of the holders of all classes of the Company’s outstanding common stock to share in distributions from the Company, except for the right of Class B stockholders to receive the par value of the Class B common stock upon our liquidation, dissolution or winding up or an exchange of Class B units;

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The Company entered into a Registration Rights Agreement with the Class B stockholders to provide for certain rights and restrictions after the IPO; and

•

Viant Technology LLC’s 2020 Equity Based Incentive Compensation Plan (the “Phantom Unit Plan”) was terminated and replaced with the Company’s 2021 Long Term Incentive Plan (the “LTIP”).

Immediately following the closing of the IPO, Viant Technology LLC is the predecessor of the Company for financial reporting purposes. The Company is a holding company, and its sole material asset is its equity interest in Viant Technology LLC. As the sole managing member of Viant Technology LLC, the Company operates and controls all of the business and affairs of Viant Technology LLC. The Reorganization Transactions are accounted for as a reorganization of entities under common control. As a result, the consolidated financial statements of the Company recognize the assets and liabilities received in the Reorganization Transactions at their historical carrying amounts, as reflected in the historical consolidated financial statements of Viant Technology LLC. The Company consolidates Viant Technology LLC in its consolidated financial statements and records a noncontrolling interest related to the Class B units held by the Class B stockholders on its consolidated balance sheets, statements of operations and statements of comprehensive income (loss).

Basis of Presentation and Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2021

Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]

Basis of Presentation and Summary of Significant Accounting Policies

2. Basis of Presentation and Summary of Significant Accounting Policies

Basis of Presentation and Principles of Consolidation

The accompanying consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and include the operations of the Company, Viant Technology LLC and its wholly owned subsidiaries. Viant Technology LLC is considered a variable interest entity (“VIE”). The Company is the primary beneficiary and sole managing member of Viant Technology LLC and has decision making authority that significantly affects the economic performance of the entity. As a result, the Company consolidates Viant Technology LLC. All intercompany balances and transactions have been eliminated in consolidation.

Viant Technology LLC has been determined to be the predecessor for accounting purposes and, accordingly, the consolidated financial statements for periods prior to the IPO and the related Reorganization Transactions have been adjusted to combine the previously separate entities for presentation purposes. Amounts for the period prior to February 12, 2021 presented in the consolidated financial statements and notes to consolidated financial statements herein represent the historical operations of Viant Technology LLC. The amounts as of December 31, 2021 and for the period from February 12, 2021 reflect the consolidated operations of the Company.

Management believes that the accompanying consolidated financial statements reflect the adjustments necessary for the fair statement of its consolidated balance sheet as of December 31, 2021 and 2020, results of operations for the years ended December 31, 2021, 2020 and 2019, and cash flows for the years ended December 31, 202, 2020 and 2019.

Use of Estimates

The preparation of our consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period.

On an on-going basis, management evaluates its estimates, primarily those related to revenue recognition, stock-based compensation, income taxes, allowances for doubtful accounts, the useful lives of capitalized software development costs and other property, equipment and software and assumptions used in the impairment analyses of long-lived assets and goodwill. These estimates are based on historical data and experience, as well as various other factors that management believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying amount of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

As of December 31, 2021, the impact of the COVID-19 pandemic on our business continues to evolve. As a result, many of our estimates and assumptions consider macro-economic factors in the market, which require increased judgment and carry a higher degree of variability and volatility. As events continue to evolve and additional information becomes available, our estimates may change materially in future periods.

Segment Information

The Company has a single reportable operating segment which operates an enterprise software platform, Adelphic, that enables marketers and their advertising agencies to automate and centralize the planning, buying and measurement of their video, audio and display ads across all channels, including desktop, mobile, connected TV, linear TV, in-game, streaming audio and digital billboards in the United States. In reaching this conclusion, management considers the definition of the chief operating decision maker (“CODM”), how the business is defined by the CODM, the nature of the information provided to the CODM and how that information is used to make operating decisions, allocate resources and assess performance. The Company’s CODM is comprised of the chief executive officer and chief operating officer. The results of operations provided to and analyzed by the CODM are at the consolidated level and accordingly, key resource decisions and assessment of performance are performed at the consolidated level. The Company assesses its determination of operating segments at least annually.

Revenue Recognition

The Company generates its revenue by providing marketers and advertising agencies with the ability to plan, buy and measure their digital advertising campaigns using its people-based DSP, Adelphic. Our platform enables marketers to reach their target audience across desktop, mobile, connected TV, linear TV, in-game, streaming audio and digital billboards.

The Company applies a five-step approach as defined in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 606, Revenue from Contracts with Customers (“ASC 606”), in determining the amount and timing of revenue to be recognized:

•

Identification of a contract with a customer;

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Identification of the performance obligations in the contract;

•

Determination of the transaction price;

•

Allocation of the transaction price to the performance obligations in the contract; and

•

Recognition of revenue when or as the performance obligations are satisfied.

We make our software platform available through different pricing options to tailor to multiple customer types and customer needs. These options consist of a percentage of spend option, a monthly subscription pricing option and a fixed cost per mille (“CPM”) pricing option. CPM refers to a payment option in which customers pay a price for every 1,000 impressions an ad receives. We generate revenue when our software platform is used on a self-service basis by charging a platform fee that is either a percentage of spend or a flat monthly subscription fee as well as fees for additional features such as data and advanced reporting. We also offer our customers the ability to use our services to aid in data management, media execution and advanced reporting. When customers utilize our services, we generate revenue by charging a (1) separate service fee that represents a percentage of spend in addition to the platform fee; (2) a flat monthly subscription fee covering services in connection with data management and advanced reporting; or (3) a fixed CPM that is inclusive of media, other direct costs and services. Some of the aforementioned offerings are relatively new to the market and are not yet material to our business from a financial perspective.

We maintain agreements with our customers in the form of master service agreements (“MSA”) in connection with the percentage of spend and monthly subscription pricing options, as well as instances where we charge our customers a flat monthly fee for services in connection with data management and advanced reporting. We maintain insertion orders (“IO”) in connection with the fixed CPM pricing option, which set out the terms of the relationship and use of our software platform. The nature of our performance obligations is to enable customers to plan, buy and measure advertising campaigns using our platform and provide campaign execution services as requested.

For the percentage of spend pricing option, we typically bill customers a platform fee, and in certain instances an additional service fee, which is based on a specified percentage of the customer’s purchases through the platform as well as fees for additional features such as data and advanced reporting, plus the cost of TAC, as defined below. We recognize revenue at the point in time when a purchase by the customer occurs through our software platform.

For the monthly subscription pricing option, we bill customers a platform fee represented by a fixed subscription amount, as well as fees for additional features such as data and advanced reporting, plus the cost of TAC. We recognize subscription fees as revenue over time on a ratable basis over the term of the agreement.

The determination of whether revenue for the percentage of spend pricing option should be reported on a gross or net basis is based on an assessment of whether we are acting as the principal or an agent in the transaction. In determining whether we are acting as the principal or an agent, we follow the accounting guidance for principal-agent considerations. Making such determinations involves judgment and is based on an evaluation of the terms of each arrangement, none of which are considered presumptive or determinative.

In instances discussed above related to the percentage of spend pricing option, we typically act as an agent because we arrange for the transfer of such costs from the supplier to the customer through the use of our software platform and do not control such features prior to transfer to the customer. We do not have primary responsibility for meeting customer specifications and do not have discretion in establishing the price of TAC related to this pricing option. As we act as the agent in these arrangements, we report revenue on a net basis. In certain arrangements, we act as a principal in percentage of spend arrangements because (i) we control the advertising inventory before it is transferred to our clients; (ii) we bear sole responsibility for fulfillment of the advertising promise and inventory risks and (iii) we have full discretion in establishing prices. As we act as the principal in these arrangements, we report revenue and the related costs incurred on a gross basis.

For the fixed CPM pricing option, we typically bill customers a fixed CPM price based on advertising impressions delivered through the platform and recognize revenue at the point in time when the advertising impressions are delivered. In certain cases, we also provide third party data segments and measurement reporting, which are recognized at the point in time they are delivered to the customer. We have the primary responsibility for meeting customer specifications and have discretion in establishing the price of TAC related to this pricing option. As we act as the principal in these arrangements, we report revenue and the related costs incurred on a gross basis.

The Company invoices its customers on a monthly basis for all pricing options. Invoice payment terms, negotiated on a customer-by-customer basis, are typically 30 to 60 days. Advertising agency customers typically have sequential liability terms, which means payments are not due to the Company from its advertising agency customer until the advertising agency customer has received payment from its customer, the advertiser.

There are no contract assets recorded on the consolidated balance sheets because the Company’s right to any unbilled consideration for performance obligations satisfied is only conditional upon the passage of time. Contract liabilities, or deferred revenue, are recorded for amounts that are collected in advance of the satisfaction of performance obligations. These liabilities are classified as current if the respective performance obligations are anticipated to be satisfied during the succeeding 12-month period per the terms of the contract, and the remaining portion is recorded as non-current deferred revenue in the consolidated balance sheets.

ASC 606 provides various optional practical expedients. The Company elected the use of the practical expedient relating to the disclosure of remaining performance obligations within a contract and will not disclose remaining performance obligations for contracts with an original expected duration of one year or less.

Operating Expenses

We classify our operating expenses into the following four categories. Each expense category includes overhead such as rent and occupancy charges, which is allocated based on headcount.

Platform Operations. Platform operations expense represents our cost of revenues, which consists of TAC, hosting costs, personnel costs, depreciation of capitalized software development costs related to our platform, customer support costs and allocated overhead. TAC recorded in platform operations consists of amounts incurred and payable to suppliers for costs associated with our fixed CPM pricing option. Personnel costs within platform operations include salaries, bonuses, stock/unit-based compensation and employee benefit costs primarily attributable to personnel who directly support our platform.

Sales and Marketing. Sales and marketing expense consists primarily of personnel costs, including salaries, bonuses, stock/unit-based compensation, employee benefit costs and commissions for our sales personnel. Sales and marketing expense also includes costs for market development programs, advertising, promotional and other marketing activities and allocated overhead. Commissions are expensed as incurred.

The Company incurred advertising costs of $4.1 million, $1.2 million, and $1.0 million for the years ended December 31, 2021, 2020 and 2019, respectively, related to the promotion of the Company, its brands, products and services to potential customers. Advertising costs are expensed as incurred and recorded in sales and marketing expense within the consolidated statements of operations.

Technology and Development. Technology and development expense consists primarily of personnel costs, including salaries, bonuses, stock/unit-based compensation and employee benefit costs associated with the ongoing development and maintenance of our software platform and allocated overhead. Technology and development costs are expensed as incurred, except to the extent that such costs are associated with software development that qualifies for capitalization, which are then recorded as capitalized software development costs included in property, equipment and software, net, on the consolidated balance sheets. We record depreciation for capitalized software not related to our platform within technology and development expense.

General and Administrative. General and administrative expense consists primarily of personnel costs, including salaries, bonuses, stock/unit-based compensation and employee benefit costs associated with our executive, accounting, finance, legal, human resources, and other administrative personnel. Additionally, this includes accounting, legal and other professional services fees, insurance expense, bad debt expense and allocated overhead.

Stock-Based Compensation

Stock-based compensation relates to equity awards granted under the Company’s 2021 LTIP, which is measured and recognized in the consolidated financial statements based on the fair value of the equity awards granted. Since inception of the 2021 LTIP, the Company has only granted restricted stock units (“RSUs”) and nonqualified stock options. The fair value of RSUs is calculated using the closing market price of the Company’s Class A common stock on the date of grant. The fair value of nonqualified stock options is estimated using the Black Scholes option pricing model. The Black Scholes option pricing model is impacted by the fair value of the Company’s Class A common stock, as well as changes in certain assumptions, including but not limited to, the expected Class A common stock price volatility over the term of the nonqualified stock options, the expected term of the nonqualified stock options, the risk-free interest rate, and the expected dividend yield. The Company records compensation for all equity awards under the 2021 LTIP under the straight-line attribution method over the requisite service period. The Company has elected the accounting policy to account for forfeitures within stock-based compensation as they occur.

A portion of RSUs granted during the year ended December 31, 2021 to certain employees and board members, pursuant to the 2021 LTIP, vested upon expiration of the 180 day IPO lock-up period during the fiscal year ended December 31, 2021. The remainder of RSUs and nonqualified stock options granted to employees will vest through the applicable vesting dates. RSUs generally vest over a period of four years, contingent upon employment on the vesting date. RSUs awarded to board members upon their appointment will vest on the third anniversary of the grant date and RSUs awarded to board members annually will vest on the first anniversary of the grant date. Nonqualified stock options will generally vest based on 4 years of continuous service and have 10-year contractual terms.

Unit-Based Compensation

The Company adopted the Limited Liability Company Agreement (the “Viant Technology LLC Agreement”) on October 4, 2016, under which it issued common unit awards, subject to vesting and other terms, to certain executives of the Company and to Viant Technology Equity Plan LLC, which issued incentive units in the form of profit interests to certain employees of the Company. The Company records compensation for all common unit awards and incentive units granted to employees of the Company, which is measured and recognized on a graded-

vesting attribution basis over the requisite service period based on the fair value of the awards at the grant date. The Company has elected the accounting policy to account for forfeitures within unit-based compensation as they occur.

During the years ended December 31, 2020 and 2019, the Company was privately held with no active public market for our common units. Therefore, in determining the fair value of equity-based awards, the Company utilized valuations prepared by an independent third party. The independent third party performed the valuations in a manner consistent with the American Institute of Certified Public Accountants Practice Aid, Valuation of Privately-Held Company Equity Securities Issued as Compensation (“Practice Aid”). In conducting the valuations, the Company considered all objective and subjective factors that it believed to be relevant in the valuation conducted, including management’s best estimate of our business condition, prospects and operating performance at the valuation dates. There are significant judgments and estimates inherent in these valuations. These judgments and estimates include assumptions regarding our future operating performance, industry growth, average selling price, and the timing of a potential initial public offering or other liquidity event.

The Company determined the fair value of equity awards using a combination of the market and income approach. The market approach and the income approach are both acceptable valuation methods in accordance with the Practice Aid. There are two general methodologies under the market approach: (i) guideline public company method, and (ii) guideline merged and acquired company method. Both methods generate a marketable equity fair value indication using market-based information available to market participants. Under the income approach, the enterprise value can be estimated using the discounted cash flow method, which involves estimating the future cash flows of a business for a discrete period and discounting them to their present value.

As provided in the Practice Aid, there are several approaches for allocating enterprise value of a privately held company to the outstanding equity of the Company. The Company selected the Option Pricing Model (“OPM”) which treats common equity and preferred equity as call options on the enterprise’s value. The exercise prices associated with these call options vary according to the liquidation preference of the preferred equity, the preferred equity conversion price, the exercise prices of common equity options and other features of a company’s equity capital structure.

Earnings (Loss) Per Share

Basic earnings (loss) per share is calculated by dividing the earnings (loss) attributable to Class A common stockholders by the number of weighted-average shares of Class A common stock outstanding. The Company’s RSUs, nonqualified stock options and shares of Class B common stock do not share in the earnings or losses of the Company and are therefore not participating securities. As such, separate presentation of basic and diluted earnings (loss) per share of RSUs, nonqualified stock options and Class B common stock under the two-class method has not been presented.

Diluted earnings per share adjusts the basic earnings (loss) per share calculation for the potential dilutive impact of common shares such as equity awards using the treasury-stock method. Diluted earnings per share considers the impact of potentially dilutive securities except in periods in which there is a loss because the inclusion of the potential common shares would have an anti-dilutive effect. Shares of our Class B common stock, RSUs, and nonqualified stock options are considered potentially dilutive shares of Class A common stock; however, related amounts have been excluded from the computation of diluted earnings per share of Class A common stock because the effect would have been anti-dilutive under the if-converted method and treasury-stock method.

Earnings (Loss) Per Unit

Basic earnings (loss) per unit is calculated by dividing the earnings (loss) attributable to common unitholders by the number of weighted-average common units outstanding. The Company applies the two-class method to allocate earnings between common and convertible preferred units.

Diluted earnings per unit adjusts the basic earnings (loss) per unit attributable to common unitholders and the weighted-average number of units of common units outstanding for the potential dilutive impact of common units, using the treasury-stock method, and convertible preferred units using the if-converted method. Diluted earnings per

unit considers the impact of potentially dilutive securities except in periods in which there is a loss because the inclusion of the potential common units would have an anti-dilutive effect.

Cash

The carrying amounts reflected in the consolidated balance sheets for cash approximate the fair value, consisting of cash on hand and at the bank.

Accounts Receivable, Net of Allowances

Accounts receivable are recorded at the invoiced amount, net of an allowance for doubtful accounts, and are unsecured and do not bear interest. The Company performs credit evaluations of its customers and certain advertisers when the Company’s agreements with its customers contain sequential liability terms that provide that the customer payments are not due to the Company until the customer has received payment from its customers (advertisers). The allowance for doubtful accounts is based on the best estimate of the amount of probable credit losses in existing accounts receivable. The allowance for doubtful accounts is determined based on historical collection experience and the review in each period of the status of the then-outstanding accounts receivable, while taking into consideration current customer information, subsequent collection history and other relevant data. Account balances are charged off against the allowance when the Company believes it is probable the receivable will not be recovered. Recoveries of accounts receivable previously written off are recorded when received.

The following table presents changes in the allowance for doubtful accounts:

	Year Ended December 31,
	2021			2020
	(in thousands)
Beginning balance	$	335		$	1,528
Provision for (recovery of) doubtful accounts		(107	)		(584	)
Write-offs, net of recoveries		(174	)		(609	)
Ending balance	$	54		$	335

Deferred Offering Costs

Deferred offering costs consisted primarily of accounting, legal, and other costs related to our IPO. As of December 31, 2020, the Company capitalized $2.2 million of deferred offering costs within prepaid expenses and other current assets in the consolidated balance sheet. Upon consummation of the IPO in February 2021, total deferred offering costs of $4.3 million were reclassified as additional paid-in capital within stockholders’ equity and recorded against the proceeds from the IPO.

Property, Equipment and Software, Net

Property, equipment and software are recorded at historical cost, less accumulated depreciation. Depreciation is computed using the straight-line method based upon the following estimated useful lives:

	Years
Computer equipment	3-5
Purchased software		3
Capitalized software development costs		3
Furniture, fixtures and office equipment		10
Leasehold improvements	*

*	Leasehold improvements are depreciated on a straight-line basis over the term of the lease, or the useful life of the assets, whichever is shorter.

Repair and maintenance costs are charged to expense as incurred, while replacements and improvements are capitalized. When assets are retired or otherwise disposed of, the cost and related accumulated depreciation are removed from the accounts and any resulting gain or loss is recorded in other expense (income), net within the consolidated statements of operations.

Capitalized Software Development Costs

The Company capitalizes certain costs associated with creating and enhancing internally developed software related to the Company’s technology infrastructure and such costs are recorded within property, equipment and software, net. These costs include personnel and related employee benefit expenses for employees who are directly associated with and who devote time to software development projects. Software development costs that do not qualify for capitalization are expensed as incurred and recorded in technology and development expense in the consolidated statements of operations.

Software development activities typically consist of three stages: (1) the planning phase; (2) the application and infrastructure development stage; and (3) the post implementation stage. Costs incurred in the planning and post implementation phases, including costs associated with training and repairs and maintenance of the developed technologies, are expensed as incurred. The Company capitalizes costs associated with software developed when the preliminary project stage is completed, management implicitly or explicitly authorizes and commits to funding the project and it is probable that the project will be completed and perform as intended. Costs incurred in the application and infrastructure development phases, including significant enhancements and upgrades, are capitalized. Capitalization ends once a project is substantially complete and the software is ready for its intended purpose. Software development costs are depreciated using a straight-line method over the estimated useful life, commencing when the software is ready for its intended use. The straight-line recognition method approximates the manner in which the expected benefit will be derived.

Capitalized Interest

The Company capitalizes interest on borrowings related to eligible capital expenditures including development costs related to internal use software which is recorded within property, equipment and software, net. Capitalized interest is added to the cost of the qualified assets and depreciated over the estimated useful lives of the assets.

Impairment of Long-Lived Assets

Long-lived assets consist of property, equipment and software and intangible assets with estimable useful lives subject to depreciation and amortization. The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. Recoverability of an asset or asset group to be held and used is measured by a comparison of the carrying amount of an asset or asset group to the estimated undiscounted future cash flows expected to be generated by the asset or asset group. If the carrying amount of the asset or asset group exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset or asset group exceeds the fair value of the asset or asset group.

Goodwill

Goodwill is tested at least annually for impairment as of the first day of the fourth fiscal quarter, or more frequently if indicators of impairment exist during the fiscal year. Events or circumstances which could trigger an impairment review include a significant adverse change in legal factors or in the business climate, loss of key customers, an adverse action or assessment by a regulator, unanticipated competition, a loss of key personnel, significant changes in the manner of the Company’s use of the acquired assets or the strategy for the Company’s overall business, significant negative industry or economic trends, or significant underperformance relative to expected historical or projected future results of operations. The Company assesses its conclusion regarding reporting units in conjunction with its annual goodwill impairment test and has determined that it has one reporting unit for the purposes of allocating and testing goodwill.

When testing goodwill for impairment, the Company first performs a qualitative assessment. If the Company determines it is more likely than not that a reporting unit’s fair value is less than its carrying amount, then a one-step impairment test is required. If the Company determines it is not more likely than not a reporting unit’s fair value is less than its carrying amount, then no further analysis is necessary. To identify whether a potential impairment exists, the Company compares the estimated fair value of the reporting unit with its carrying amount, including goodwill. If the estimated fair value of the reporting unit exceeds its carrying amount, goodwill is not considered to be impaired. If, however, the fair value of the reporting unit is less than its carrying amount, then such balance would be recorded as an impairment loss. Any impairment loss is limited to the carrying amount of goodwill within the entity.

Paycheck Protection Program Loan

On April 14, 2020, the Company received the proceeds from a loan in the amount of approximately $6.0 million (the “PPP Loan”) from PNC Bank, as lender, pursuant to the Paycheck Protection Program (“PPP”) of the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”). The Company accounted for the PPP Loan as a financial liability in accordance with ASC Topic 470, Debt. Accordingly, the PPP Loan was recognized within long-term debt and current portion of long-term debt in the Company’s consolidated balance sheet and the related accrued interest was included within accrued liabilities in the Company’s consolidated balance sheet as of December 31, 2020. In June 2021, the Company received a notice of forgiveness of the PPP Loan in whole, including all accrued unpaid interest. The forgiveness of the loan is recognized as a gain on extinguishment of debt on the consolidated statement of operations for the year ended December 31, 2021. Refer to Note 7 for additional information.

Fair Value of Financial Instruments

The framework for measuring fair value and related disclosure requirements about fair value measurements are provided in ASC 820, Fair Value Measurement (“ASC 820”). This pronouncement defines fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value hierarchy prescribed by ASC 820 contains three input levels as follows:

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Level 1: Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date.

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Level 2: Other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability.

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Level 3: Unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at the measurement date.

The carrying amounts of the Company’s cash, accounts receivable, accounts payable, accrued compensation and accrued liabilities approximate fair value due to the short-term nature of these instruments.

Financial Instruments Not Recorded at Fair Value on a Recurring Basis

Certain financial instruments, including debt, are not measured at fair value on a recurring basis in the consolidated balance sheets. The fair value of debt was estimated using primarily level 2 inputs including quoted market prices or discounted cash flow analyses, based on estimated incremental borrowing rates for similar types of borrowing arrangements.

Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis

Certain assets and liabilities, including goodwill and intangible assets, are subject to measurement at fair value on a non-recurring basis if there are indicators of impairment or if they are deemed to be impaired as a result of an impairment review.

There were no assets or liabilities measured at fair value using Level 3 inputs for the periods presented.

Leases

Rent expense on operating leases of $4.4 million, $4.2 million and $4.7 million for the years ended December 31, 2021, 2020 and 2019, respectively, is recorded on a straight-line basis over the lease term. The difference between cash payments for rent and the expense recorded is reported as current and non-current deferred rent in the accompanying consolidated balance sheets. The current portion of deferred rent of $0.2 million and $0.4 million as of December 31, 2021 and 2020, respectively, is included in other current liabilities. The non-current portion of deferred rent of $0.8 million and $0.5 million as of December 31, 2021 and 2020, respectively, is included in other long-term liabilities.

Concentration of Risk

Financial instruments that potentially subject the Company to concentration of credit risk consist principally of cash and accounts receivable. The Company maintains its cash with financial institutions and its cash levels exceed the Federal Deposit Insurance Corporation (FDIC) federally insured limits. Accounts receivable include amounts due from customers with principal operations primarily in the United States.

As of December 31, 2021, two individual customers accounted for 13.2% and 12.3% of consolidated accounts receivable. As of December 31, 2020, one individual customer accounted for 13.7% of consolidated accounts receivable. For the years ended December 31, 2021, 2020, and 2019, no individual customers accounted for more than 10% of consolidated revenue.

The following table provides the Company’s concentrations of credit risk with respect to advertising agency holding companies as a percentage of the Company’s total revenues:

	Year Ended December 31,
Advertising Agency Holding Company	2021			2020
A		15.5	%	*
B		14.2	%		13.2	%
C	*				13.3	%

* Less than 10% of total revenues.

As of December 31, 2021, one individual supplier accounted for 16.8% of consolidated accounts payable and accrued liabilities. As of December 31, 2020, three suppliers accounted for 15.5%, 11.5%, and 10.9% of consolidated accounts payable and accrued liabilities, respectively.

Foreign Currency Transactions and Translation

The Company’s UK subsidiary had a non-U.S. dollar functional currency. The UK subsidiary was dissolved in 2019. The Company translates assets and liabilities of non-U.S. dollar functional currency subsidiaries into U.S. dollars using exchange rates in effect at the end of each period and members’ equity at historical rates. Revenue and expenses for the subsidiary are translated using rates that approximate those in effect during the period. Foreign currency gains and losses from translation are recorded in cumulative translation adjustment within the consolidated balance sheets.

The Company remeasures monetary assets or liabilities denominated in currencies other than the functional currency using exchange rates prevailing on the balance sheet date, and non-monetary assets and liabilities at historical rates.

Foreign currency remeasurement and transaction gains and losses are included in other expense (income), net within the consolidated statements of operations and statements of comprehensive income (loss) and were de minimis during the years ended December 31, 2021, 2020 and 2019.

Related Party Relationships

Four Brothers 2 LLC, the holder of Class B common stock as of December 31, 2021, is controlled by the Company’s co-founders, Tim Vanderhook and Chris Vanderhook, and therefore is considered a related party. Refer to Note 7, Note 8 and Note 15 for further information.

Income Taxes

The Company is the managing member of Viant Technology LLC and, as a result, consolidates the financial results of Viant Technology LLC in the consolidated financial statements. Viant Technology LLC is a pass-through entity for U.S. federal and most applicable state and local income tax purposes following a corporate reorganization effected in connection with our initial public offering. As an entity classified as a partnership for tax purposes, Viant Technology LLC is not subject to U.S. federal and certain state and local income taxes. Any taxable income or loss generated by Viant Technology LLC is passed through to and included in the taxable income or loss of its members, including us. The Company is taxed as a corporation and pays corporate federal, state and local taxes with respect to income allocated from Viant Technology LLC, based on Viant Technology Inc.'s 22.5% interest in Viant Technology LLC.

The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities (“DTAs” and “DTLs”) for the expected future tax consequences of events that have been included in the financial statements. Under this method, we determine DTAs and DTLs on the basis of the differences between the financial statement and tax bases of assets and liabilities by using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on DTAs and DTLs is recognized in income in the period that includes the enactment date. We recognize DTAs to the extent that we believe that these assets are more likely than not to be realized. In making such a determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, carryback potential if permitted under the tax law and results of recent operations. If we determine that we would be able to realize our DTAs in the future in excess of their net recorded amount, we would make an adjustment to the DTA valuation allowance, which would reduce the provision for income taxes.

The Company records uncertain tax positions in accordance with ASC 740 on the basis of a two-step process in which (1) we determine whether it is more likely than not that the tax positions will be sustained on the basis of the technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold, we recognize the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority.

Tax Receivable Agreement

The Company expects to obtain an increase in its share of tax basis in the net assets of Viant Technology LLC when Class B units are exchanged by the holders of Class B units for shares of Class A common stock of the Company and upon other qualifying transactions. Each change in outstanding shares of Class A common stock of the Company results in a corresponding increase or decrease in the Company's ownership of Class A units of Viant Technology LLC. The Company intends to treat any exchanges of Class B units as direct purchases of LLC interests for U.S. federal income tax purposes. These increases in tax basis may reduce the amounts that the Company would otherwise pay in the future to various taxing authorities. They may also decrease gains (or increase losses) on future dispositions of certain capital assets to the extent tax basis is allocated to those capital assets.

In connection with the IPO, the Company entered into a Tax Receivable Agreement (“TRA”) with Viant Technology LLC and the holders of Class B units of Viant Technology LLC. In the event that such parties exchange any or all of their Class B units for Class A common stock, the TRA requires the Company to make payments to such holders for 85% of the tax benefits realized, or in some cases deemed to be realized, by the Company by such exchange as a result of (i) increases in the Company’s tax basis of its ownership interest in the net assets of Viant Technology LLC resulting from any redemptions or exchanges of noncontrolling interest, (ii) tax basis increases attributable to payments made under the TRA and (iii) deductions attributable to imputed interest pursuant to the TRA (the “TRA Payments”). The annual tax benefits are computed by calculating the income taxes due, including

such tax benefits and the income taxes due without such benefits. The Company expects to benefit from the remaining 15% of any tax benefits that it may actually realize. The TRA Payments are not conditioned upon any continued ownership interest in Viant Technology LLC or the Company. To the extent that the Company is unable to timely make payments under the TRA for any reason, such payments generally will be deferred and will accrue interest until paid.

The timing and amount of aggregate payments due under the TRA may vary based on a number of factors, including the amount and timing of the taxable income the Company generates each year and the tax rate then applicable. The Company calculates the liability under the TRA using a TRA model, which includes an assumption related to the fair market value of assets. The payment obligations under the TRA are obligations of the Company and not of Viant Technology LLC. Payments are generally due under the TRA within a specified period of time following the filing of the Company’s tax return for the taxable year with respect to which the payment obligation arises, although interest on such payments will begin to accrue at a rate of the Secured Overnight Financing Rate plus 500 basis points from the due date (without extensions) of such tax return.

The TRA provides that if (i) certain mergers, asset sales, other forms of business combinations, or other changes of control were to occur, (ii) there is a material breach of any material obligations under the TRA; or (iii) the Company elects an early termination of the TRA, then the TRA will terminate and the Company's obligations, or the Company's successor’s obligations, under the TRA will accelerate and become due and payable, based on certain assumptions, including an assumption that the Company would have sufficient taxable income to fully utilize all potential future tax benefits that are subject to the TRA and that any Class B units that have not been exchanged are deemed exchanged for the fair market value of the Company's Class A common stock at the time of termination.

Treasury Stock

We account for treasury stock under the cost method. When treasury stock is re-issued at a price higher than its cost, the difference is recorded as a component of additional paid-in-capital in our consolidated balance sheets. When treasury stock is re-issued at a price lower than its cost, the difference is recorded as a component of additional paid-in-capital to the extent that there are previously recorded gains to offset the losses. If there are no treasury stock gains in additional paid-in-capital, the losses upon re-issuance of treasury stock are recorded as an increase in accumulated deficit in our consolidated balance sheets.

Recently Issued Accounting Pronouncements

On April 5, 2012, the Jumpstart Our Business Startups Act (the “JOBS Act”) was signed into law. The JOBS Act contains provisions that, among other things, reduce certain reporting requirements for qualifying public companies. As an “emerging growth company,” the Company may, under Section 7(a)(2)(B) of the Securities Act, delay adoption of new or revised accounting standards applicable to public companies until such standards would otherwise apply to private companies. An “emerging growth company” is one with less than $1.07 billion in annual sales, has less than $700 million in market value of its shares of common stock held by non-affiliates and issues less than $1 billion of non-convertible debt over a three year period. The Company may take advantage of this extended transition period until the first to occur of the date that it (i) is no longer an “emerging growth company” or (ii) affirmatively and irrevocably opts out of this extended transition period.

The Company has elected to take advantage of the benefits of this extended transition period. Until the date that the Company is no longer an “emerging growth company” or affirmatively and irrevocably opts out of the exemption provided by Securities Act Section 7(a)(2)(B), upon issuance of a new or revised accounting standard that applies to its consolidated financial statements and that has a different effective date for public and private companies, the Company will disclose the date on which it will adopt the recently issued accounting standard.

In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02, Leases (Topic 842), which requires an entity to recognize right-of-use assets and lease liabilities on its balance sheet and disclose key information about leasing arrangements. The guidance offers specific accounting guidance for a lessee, lessor, and sale and leaseback transactions. Lessees and lessors are required to disclose qualitative and quantitative information about leasing arrangements to enable a user of the financial

statements to assess the amount, timing and uncertainty of cash flows arising from leases. Leases will be classified as either finance or operating, with the classification affecting the pattern of expense recognition in the income statement. In March 2019, the FASB issued ASU No. 2019-01 which made further targeted improvements including clarification regarding the determination of fair value of lease assets and liabilities and statement of cash flows and presentation guidance. In June 2020, FASB issued ASU 2020-05, which extended the effective date of this guidance for non-public entities to fiscal years beginning after December 15, 2021. As a part of the Company’s election under the JOBS Act, the guidance is effective for the Company’s annual reporting period beginning after December 15, 2021 and interim reporting periods within the annual period beginning after December 15, 2022. The Company adopted Topic 842 effective January 1, 2022 utilizing the modified retrospective transition method. We expect the adoption of Topic 842 to have a material impact on the Company’s consolidated balance sheet because certain of our operating lease commitments will be recognized as right-of-use assets and lease liabilities. This new guidance is not expected to have a material impact upon the Company’s consolidated statement of operations. We have elected the package of practical expedients permitted under the transition guidance within Topic 842, which allowed us to carry forward prior conclusions about lease identification, classification and initial direct costs for leases entered into prior to adoption of Topic 842. Additionally, we elected to not separate lease and non-lease components for all of our leases. For leases with a term of 12 months or less, we elected the short-term lease exemption, which allowed us to not recognize right-of-use assets or lease liabilities for qualifying leases existing at transition and new leases we may enter into in the future.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments—Credit Losses (Topic 326). ASU 2016-13 revises the impairment model to utilize an expected loss methodology in place of the currently used incurred loss methodology, which will result in more timely recognition of losses on financial instruments, including, but not limited to, available for sale debt securities and accounts receivable. The guidance is effective for the Company’s annual reporting period beginning after December 15, 2022 and interim reporting periods within that annual reporting period. The Company does not expect the adoption of this ASU to have a material impact on the consolidated financial statements.

In October 2020, the FASB issued ASU No. 2020-10, Codification Improvements, which updates various codification topics by clarifying disclosure requirements to align with the SEC's regulations. The guidance is effective for the Company’s annual reporting period beginning after December 15, 2021 and interim reporting periods within the annual period beginning after December 15, 2022. The Company is currently assessing the impact this guidance will have on the consolidated financial statements.

In May 2021, the FASB issued ASU No. 2021-04, Earnings Per Share (Topic 260), Debt—Modifications and Extinguishments (Subtopic 470-50), Compensation—Stock Compensation (Topic 718), and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40). The purpose of ASU 2021-04 is to clarify and reduce diversity in an issuer’s accounting for modifications or exchanges of freestanding equity-classified written call options that remain equity classified after modification or exchange. The ASU requires issuers to account for modifications or exchanges of freestanding equity-classified written call options that remain equity classified after the modification or exchange based on the economic substance of the modification or exchange. In accordance with ASU 2021-04, an issuer determines the accounting for the modification or exchange based on whether the transaction was done to issue equity, to issue or modify debt, or for other reasons. The guidance is effective for the Company’s annual reporting period beginning after December 15, 2021 and interim reporting periods within that annual reporting period. The Company is currently assessing the impact this guidance will have on the consolidated financial statements.

Recently Adopted Accounting Pronouncements

In September 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force), which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal use software. Early adoption is permitted and can be applied prospectively to all implementation costs incurred after the date of adoption or retrospectively. The Company adopted this ASU prospectively on January 1, 2021, and the adoption of this ASU did not have a material impact on the consolidated financial statements.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes ("ASU 2019-12"). ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. The Company adopted ASU 2019-12 prospectively on January 1, 2021, and the adoption of this ASU did not have a material impact on the consolidated financial statements.

Revenue

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

Revenue

3. Revenue

The Company recognizes revenue in accordance with ASC 606. Refer to Note 2 of these notes to our consolidated financial statements for a description of our ASC 606 revenue recognition accounting policies. Although the Company maintains agreements with its customers in multiple contractual forms, the overall promise within each of the contract types is to provide customers the ability to plan, buy and measure their digital advertising campaigns using our platform.

The disaggregation of revenue was as follows:

	Year Ended December 31,
	2021		2020		2019
Revenue	(in thousands)
Over time	$	3,880	$	4,612	$	6,237
Point in time		220,247		160,639		158,655
Total revenue	$	224,127	$	165,251	$	164,892

Remaining performance obligations for contracts with an original expected duration of greater than one year amounted to $6.6 million and $9.2 million as of December 31, 2021 and 2020, respectively, which primarily relate to deferred revenue and data management and advanced reporting services. As of December 31, 2021 and 2020, $1.3 million and $3.6 million, respectively, is expected to be recognized within one year, with the remaining amounts expected to be recognized thereafter.

Contract Liabilities

The follow table summarizes the changes in deferred revenue balances:

	Year Ended December 31,
	2021			2020
	(in thousands)
Beginning balance	$	8,337		$	10,030
Recognition of deferred revenue		(1,786	)		(1,693	)
Deferral of revenue		—			—
Ending balance	$	6,551		$	8,337

The revenue recognized from the contract liabilities consisted of the Company satisfying performance obligations during the normal course of business. Deferred revenue that is anticipated to be recognized during the succeeding 12-month period is recorded in current portion of deferred revenue and the remaining amount is recorded as non-current portion of deferred revenue within the consolidated balance sheets.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

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-Publisher FASB
-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-Paragraph 13
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Property, Equipment and Software, Net

12 Months Ended

Dec. 31, 2021

Property Plant And Equipment [Abstract]

Property, Equipment and Software, Net

4. Property, Equipment and Software, Net

Major classes of property, equipment and software were as follows:

	As of December 31,
	2021			2020
	(in thousands)
Capitalized software development costs	$	61,490		$	43,627
Computer equipment		1,823			1,575
Purchased software		32			32
Furniture, fixtures and office equipment		1,159			1,087
Leasehold improvements		2,178			2,115
Total property, equipment and software		66,682			48,436
Less: Accumulated depreciation		(44,351	)		(34,607	)
Total property, equipment and software, net	$	22,331		$	13,829

Depreciation recorded in the consolidated statements of operations was as follows:

	Year Ended December 31,
	2021		2020		2019
	(in thousands)
Platform operations	$	7,688	$	6,638	$	6,832
Sales and marketing		—		—		—
Technology and development		1,599		1,608		1,537
General and administrative		625		631		554
Total	$	9,912	$	8,877	$	8,923

Interest cost recorded in the consolidated balance sheets and consolidated statements of operations was as follows:

	Year Ended December 31,
	2021		2020		2019
	(in thousands)
Amount charged to expense	$	865	$	1,055	$	4,105
Amount capitalized within property, equipment and software, net		20		31		44
Total interest cost	$	885	$	1,087	$	4,149

Goodwill and Intangible Assets, Net

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets, Net

5. Goodwill and Intangible Assets, Net

The Company’s goodwill balance of $12.4 million as of December 31, 2021 and 2020, was recorded as part of the Company’s February 2017 acquisition of Adelphic. The goodwill balance was determined based on the excess of the purchase price paid over the fair value of the identifiable net assets acquired, and represents its future revenue and earnings potential and certain other assets acquired that do not meet the recognition criteria, such as assembled workforce.

The Company performed an impairment test of its goodwill as of the first day of the fourth fiscal quarter in accordance with its accounting policy. The results of this test indicated that the Company’s goodwill was not impaired. No goodwill impairment was recorded for the years ended December 31, 2021, 2020 or 2019.

Intangible assets primarily consist of acquired developed technology, customer relationships, trade names and trademarks resulting from business combinations and acquired patent intangible assets, which are recorded at acquisition-date fair value, less accumulated amortization. The Company determines the appropriate useful life of its intangible assets by performing an analysis of expected cash flows of the acquired assets. Intangible assets are amortized over their estimated useful lives using a straight-line method, which approximates the pattern in which

the economic benefits are consumed. No impairment was recorded for intangible assets or other long lived assets during the years ended December 31, 2021, 2020 or 2019.

The balances of intangibles assets and accumulated amortization are as follows:

	As of December 31, 2021
	Remaining Weighted Average Useful Life		Gross Amount		Accumulated Amortization			Net Carrying Amount
	(in years)		(in thousands)
Developed technology		1.1	$	4,927	$	(4,169	)	$	758
Customer relationships		2.1		2,300		(1,615	)		685
Trademarks/tradenames		4.0		1,400		(1,057	)		343
Total			$	8,627	$	(6,841	)	$	1,786

	As of December 31, 2020
	Remaining Weighted Average Useful Life		Gross Amount		Accumulated Amortization			Net Carrying Amount
	(in years)		(in thousands)
Developed technology		2.1	$	4,927	$	(3,469	)	$	1,458
Customer relationships		3.1		2,300		(1,287	)		1,013
Trademarks/tradenames		4.2		1,400		(856	)		544
Total			$	8,627	$	(5,612	)	$	3,015

Amortization recorded in the consolidated statements of operations was as follows:

	Year Ended December 31,
	2021		2020		2019
	(in thousands)
Platform operations	$	700	$	700	$	703
Sales and marketing		—		—		—
Technology and development		—		—		—
General and administrative		529		529		529
Total	$	1,229	$	1,229	$	1,232

Estimated future amortization of intangible assets as of December 31, 2021 is as follows:

Year ending December 31,	(in thousands)
2022	$	1,119
2023		467
2024		107
2025		80
2026		13
Thereafter		—
Total	$	1,786

Accrued Liabilities

12 Months Ended

Dec. 31, 2021

Payables And Accruals [Abstract]

Accrued Liabilities

6. Accrued Liabilities

The Company’s accrued liabilities consisted of the following:

	As of December 31,
	2021		2020
	(in thousands)
Accrued traffic acquisition costs	$	30,942	$	22,667
Other accrued liabilities		3,144		2,010
Total accrued liabilities	$	34,086	$	24,677

Long-Term Debt and Revolving Credit Facility

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Long-Term Debt and Revolving Credit Facility

7. Long-Term Debt and Revolving Credit Facility

The Company’s debt and revolving credit facilities consisted of the following:

	As of December 31,
	2021		2020
	(in thousands)
Revolving credit facility	$	17,500	$	17,500
PPP Loan		—		6,035
Total debt		17,500		23,535
Less: Current portion of long-term debt		—		(3,353	)
Total long-term debt	$	17,500	$	20,182

As of December 31, 2020, the current portion of long-term debt related to the PPP Loan. The carrying value of the revolving credit facility as of December 31, 2021 and December 31, 2020 approximated its fair value as the interest rate is variable and approximates prevailing market interest rates for similar debt arrangements. The carrying value of the PPP Loan as of December 31, 2020 approximated its fair value, which was estimated using quoted market prices, based on estimated incremental borrowing rates for similar types of borrowing arrangements.

2019 Former Holdco Transaction

On March 2, 2016, Viant Technology LLC entered into a secured loan agreement with its related party, the Former Holdco, which at that time was a 60% stakeholder of Viant Technology LLC. The notes accrued interest at a rate of 7% per year, payable quarterly. Any interest not paid when due was compounded as a component of the principal amount then outstanding. The notes were subject to an original maturity of March 2, 2021, unless earlier purchased, redeemed or otherwise settled.

On October 4, 2016, certain members of Viant Technology LLC and the Former Holdco entered into a put/call agreement in which certain employees received the right, but not the obligation to cause the Former Holdco to purchase all or a portion of the employees’ unrestricted common units beginning on March 31, 2019 and on each annual anniversary of that date. Viant Technology LLC was not a party to this put/call agreement and did not account for this agreement within its consolidated financial statements. No call or put rights were exercised during the year ended December 31, 2019.

On September 15, 2019, Viant Technology LLC’s co-founders entered into a Unit Repurchase Agreement (the “Agreement”) in connection with the 2019 Former Holdco transaction with the Former Holdco to repay a portion of the outstanding principal amount, to cancel any remaining loan obligations, cancel all outstanding put/call options and to retire the outstanding equity interest in Viant Technology LLC held by the Former Holdco.

Under the terms of the Agreement, on October 31, 2019, Viant Technology LLC paid the Former Holdco $25.0 million, deemed the “purchase price,” toward the repayment in full of principal, interest or other amounts owed by Viant Technology LLC to the Former Holdco and its affiliates. Additionally, Viant Technology LLC paid approximately $3.5 million for professional service fees associated with the transaction paid on behalf of the Former Holdco. In return, the Former Holdco, on behalf of itself and its affiliates, cancelled and forgave any

additional amounts owed by Viant Technology LLC pursuant to the March 2, 2016 loan agreement or any other loans. The Agreement also resulted in the termination of all outstanding put/call agreements. Upon closing of this transaction, the Former Holdco’s ownership in Viant Technology LLC was automatically transferred to Viant Technology LLC.

In accordance with the Agreement, the purchase price consisted of $17.5 million of cash generated from the execution of the PNC Bank line of credit and $7.5 million of cash received from the sale of the 2019 convertible preferred units to Four Brothers 2 LLC, representing 100% of Viant Technology LLC’s outstanding convertible preferred units. As a result of this transaction, along with the payment of approximately $3.5 million in professional services paid on behalf of the Former Holdco, Viant Technology LLC settled $72.6 million of outstanding principal and accrued interest on the long-term promissory note and recorded additional paid-in capital of $47.6 million representing the forgiveness of outstanding debt and $45.0 million representing the retirement of the 2016 convertible preferred units resulting from the cancellation of Viant Technology LLC’s equity interest held by the Former Holdco.

Revolving Credit Facility

On October 31, 2019, we entered into an asset-based revolving credit and security agreement with PNC Bank (the “Loan Agreement”). The Loan Agreement provides a senior secured revolving credit facility of up to $40.0 million with a maturity date of October 31, 2024. The Loan Agreement is collateralized by security interests in substantially all of our assets.

Advances under the Loan Agreement bear interest through maturity at a variable rate based upon our selection of either a Domestic Rate or a LIBOR Rate, plus an applicable margin (“Domestic Rate Loans” and “LIBOR Rate Loans”). The Domestic Rate is defined as a fluctuating interest rate equal to the greater of (1) the base commercial lending rate of PNC Bank, (2) the overnight federal funds rate plus 0.50% and (3) the Daily LIBOR Rate plus 1.00%. The effective weighted average interest rate for the year ended December 31, 2021 was 3.24%. The applicable margin as of December 31, 2021 was equal to 0.75% for Domestic Rate Loans and 1.75% for LIBOR Rate Loans. The applicable margin that commenced October 15, 2021 is between 0.75% to 1.25% for Domestic Rate Loans and between 1.75% and 2.25% for LIBOR Rate Loans based on maintaining certain undrawn availability ratios. The facility fee for undrawn amounts under the Loan Agreement is 0.375% per annum. We will also be required to pay customary letter of credit fees, as necessary.

The Loan Agreement contains customary conditions to borrowings, events of default and covenants, including covenants that restrict our ability to sell assets, make changes to the nature of the business, engage in mergers or acquisitions, incur, assume or permit to exist additional indebtedness and guarantees, create or permit to exist liens, pay dividends, issue equity instruments, make distributions or redeem or repurchase capital stock or make other investments, and engage in transactions with affiliates. The Loan Agreement also requires that we maintain compliance with a minimum Fixed Charge Coverage Ratio (as defined in the Loan Agreement) of 1.40 to 1.00 at any time undrawn availability under the Loan Agreement is less than 25%. As of December 31, 2021, we are in compliance with all covenants.

PPP Loan

On April 14, 2020, the Company received the proceeds from the PPP Loan in the amount of approximately $6.0 million from PNC Bank, as lender, pursuant to the PPP of the CARES Act. The PPP Loan, which is evidenced by a note dated April 11, 2020, bears interest at an annual rate of 1.0% and matures on April 11, 2022. No interest or principal is due during the first fifteen months after April 11, 2020, although interest will continue to accrue over this fifteen-month deferral period. The PPP Loan may be prepaid without penalty, at the option of the Company, at any time prior to maturity. The promissory note evidencing the PPP Loan contains customary events of default relating to, among other things, payment defaults, breach of representations and warranties, or other provisions of the promissory note. The occurrence of an event of default may trigger the immediate repayment of all amounts outstanding, collection of all amounts owing from the Company, and/or filing suit and obtaining a judgment against the Company.

Proceeds from loans granted under the CARES Act are to be used for payroll, costs to continue employee group health care benefits, rent, utilities and certain other qualified costs (collectively, “qualifying expenses”). The Company has used the PPP Loan proceeds for qualifying expenses. In June 2021, the Company received notice of forgiveness of the PPP Loan in whole, including all accrued unpaid interest. The Company recorded the forgiveness of approximately $6.0 million of principal and $0.1 million of accrued interest, which is included in gain on extinguishment of debt on the consolidated statement of operations for the year ended December 31, 2021.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(c))
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-Name Accounting Standards Codification
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+ Details

Convertible Preferred Units and Common Units

12 Months Ended

Dec. 31, 2021

Convertible Preferred Units And Common Units [Abstract]

Convertible Preferred Units and Common Units

8. Convertible Preferred Units and Common Units

2016 and 2019 Convertible Preferred Units

Pursuant to the Unit Repurchase Agreement completed on October 31, 2019, the 600,000 2016 convertible preferred units representing the Former Holdco’s ownership interest were retired by Viant Technology LLC, and Viant Technology LLC sold 600,000 2019 convertible preferred units to Four Brothers 2 LLC.

The 2016 convertible preferred units held by the Former Holdco had a liquidation preference of $190.65 per unit. Each preferred unit was convertible at the option of the holder at any time into one common unit by written notice to Viant Technology LLC.

The liquidation preference provisions of the 2016 convertible preferred units held by the Former Holdco were considered contingent redemption provisions because there were certain elements that were not solely within the control of Viant Technology LLC, such as a change in control of Viant Technology LLC. Accordingly, Viant Technology LLC has presented these 2016 convertible preferred units within the mezzanine portion of the accompanying consolidated balance sheets.

The 2019 convertible preferred units held by Four Brothers 2 LLC have a liquidation preference equal to the initial capital contribution plus an annual preferred return available to the holders only upon liquidation, which is calculated on a daily basis by multiplying the accrued stated value of the unit on the first day of each calendar quarter by 0.028% (10% divided by 360). The accrued stated value is calculated as $12.50 per preferred unit plus the accrued return. Each preferred unit may be converted at the option of the holder at any time into one common unit by written notice to Viant Technology LLC.

The liquidation preference provisions of the 2019 convertible preferred units held by Four Brothers 2 LLC are considered contingent redemption provisions because there are certain elements that are not solely within the control of Viant Technology LLC, such as a change in control of Viant Technology LLC. Accordingly, the Company has presented the 2019 convertible preferred stock within the mezzanine portion of the accompanying consolidated balance sheets.

The 2019 convertible preferred units were issued at an implied discount of $27.6 million, representing a beneficial conversion feature recorded in additional paid-in capital of the same amount. A beneficial conversion feature is measured as the difference between the effective conversion price of the 2019 convertible preferred units, $12.50 per unit, and the fair value of the common units into which the preferred units are convertible at issuance, $58.43 per unit. Since the 2019 convertible preferred units are perpetual in that they have no stated maturity date and are immediately convertible at any time, the discount upon issuance was immediately and fully amortized as a deemed dividend on the issuance date.

The fair value of common units was derived using the Black-Scholes-Merton option valuation model, which incorporated a combination of the market approach and income approach weighted at 50% to each approach. The valuation model requires the Company to make assumptions and judgments regarding the variables used in the calculation. These variables include the expected term, expected volatility, expected risk-free interest rate and other relevant inputs. Expected term is based on the estimated liquidation event occurrence.

Expected volatility is based on 3.25-year historical volatility of guideline companies commensurate with the time period. The expected risk-free rate is based on the yield of 3-year U.S. Treasury notes as of the valuation date.

The following outlines the option valuation assumptions used in the fair value calculation of common units:

Risk-free interest rate		2.28	%
Volatility		70	%
Expected term	< 2 years
Discount for lack of marketability		29	%

Common Units

There were 400,000 common units authorized, issued and outstanding as of December 31, 2020 and 2019. Distributions to members, as determined and approved by the board of managers, are made to holders of preferred and common units in proportion to their holdings of common units then outstanding on an as-converted basis. All profit and loss allocations, including those made as a result of a capital transaction, will be made pursuant to the provisions of the Viant Technology LLC Agreement.

Member Dividend Distributions

In October 2020, Viant Technology LLC’s board of managers declared and approved a distribution of $5.0 million to the holders of preferred and common units in accordance with the provisions of the Viant Technology LLC Agreement, resulting in payment of $3.0 million to the preferred unitholders and $2.0 million to the common unitholders.

In connection with the IPO in February 2021, the preferred and common units of Viant Technology LLC were converted to Class B units and thus have no balance as of December 31, 2021. See Note 11—Earnings (Loss) Per Share/Unit for additional information regarding the conversion.

Stock/Unit-Based Compensation

12 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock/Unit-Based Compensation

9. Stock/Unit-Based Compensation

During the years ended December 31, 2020 and 2019, employees and other service providers were eligible to be granted profit interests in the form of common units under an equity incentive plan or other arrangement approved by the board of managers. The recipients of the common units were not required to make any capital contributions in exchange for their units.

Stock/Unit-based compensation recorded in the consolidated statements of operations was as follows:

	Year Ended December 31,
	2021		2020		2019
	(in thousands)
Platform operations	$	13,096	$	—	$	42
Sales and marketing		25,639		—		44
Technology and development		12,373		—		82
General and administrative		17,714		—		922
Total	$	68,822	$	—	$	1,090

Unit-Based Compensation

Incentive Units

The board of managers determined the terms of each grant including vesting requirements. Incentive units generally vested over a four-year period from the date of grant.

The following table summarizes the incentive unit activity for the periods presented:

	Year Ended December 31,
	2021		2020		2019
Incentive units outstanding, beginning of period		—		—		160,000
Granted		—		—		4,000
Forfeited		—		—		(4,000	)
Vested		—		—		(160,000	)
Incentive units outstanding, end of period		—		—		—

The weighted average grant date fair value for all units granted, forfeited, vested and outstanding as presented in the table above was $7.80 per unit. As of December 31, 2019, the Company had recognized all unit-based compensation related to incentive units.

In accordance with the terms of the Viant Technology LLC Agreement, any common units that fail to vest or are forfeited shall be reallocated to the Company’s two executive directors, provided the executive directors remain employed by the Company or its affiliates. In 2019, certain grantees forfeited 4,000 units that were then reallocated to the Company’s executive directors in accordance with the terms of the Viant Technology LLC Agreement.

In conjunction with the unit repurchase and long-term debt settlement discussed in Note 7, all unvested incentive units immediately vested on October 31, 2019 and the Company recognized $0.6 million of accelerated unit-based compensation on that date. As of December 31, 2020 and 2019, all 400,000 incentive units were vested and outstanding. In connection with the IPO during the year ended December 31, 2021, the incentive units converted to Class B common stock.

The valuation of incentive unit awards incorporated the income approach and the market approach in determining the fair value. The Company applied a 50% weight to each approach, utilizing the OPM to allocate value to different classes of equity. The following outlines the option valuation assumptions used in the fair value calculation of incentive units:

Risk-free interest rate		0.9	%
Volatility		55.4	%
Expected Term	2.5 years
Discount for lack of marketability		55	%

Phantom Unit Plan and 2021 LTIP

On January 1, 2020, Viant Technology LLC formalized the 2020 Equity Based Incentive Compensation Plan (the “Phantom Unit Plan”), under which Viant Technology LLC was authorized to issue 12,500,000 phantom units. Upon the occurrence of a liquidation event, the units will participate in any increase in the fair value of the entity above the stated distribution threshold of $100 million. The units vest on a quarterly basis over four years, and all units granted to an employee, whether vested or unvested, automatically forfeit upon termination of employment for any reason. Based on the terms of the Phantom Unit Plan and unit award grants, no compensation cost was recorded in the consolidated statement of operations for the year ended December 31, 2020.

In connection with the IPO, which occurred on February 12, 2021, the Phantom Unit Plan was replaced by the 2021 LTIP. The aggregate maximum number of shares of the Company’s Class A common stock that may be issued pursuant to stock awards under the 2021 LTIP, or the Share Reserve, is 11,787,112 shares of Class A common stock. The Share Reserve will automatically increase on January 1 of each year commencing on January 1, 2022 and ending with a final increase on January 1, 2031 in an amount equal to 5% of the total number of shares of capital stock outstanding on December 31st of the preceding calendar year; provided, however, that the Company’s board

of directors may provide that there will not be a January 1st increase in the Share Reserve in a given year or that the increase will be less than 5% of the shares of capital stock outstanding on the preceding December 31^st.

On February 12, 2021, 6.2 million RSUs were granted under the Company’s 2021 LTIP. The Company is authorized to grant RSUs, incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock awards, and performance stock awards under its 2021 LTIP. As of December 31, 2021, the Company has currently only granted RSUs and nonqualified stock options. Under the Company’s 2021 LTIP, 6.7 million shares remained available for grant as of December 31, 2021.

Stock-Based Compensation

RSUs

The following summarizes RSU activity:

	Number of Shares			Weighted-Average Grant-Date Fair Value		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
	(in thousands)					(in years)		(in thousands)
RSUs outstanding as of December 31, 2020		—		$	—
Granted		6,488			24.62
Vested		(2,792	)		24.88
Canceled/forfeited		(663	)		25.02
RSUs outstanding as of December 31, 2021		3,033			24.29		1.22	$	29,433

The total fair value of RSUs, as of their respective vesting dates, during the year ended December 31, 2021 was $45.2 million. As of December 31, 2021, the Company had unrecognized stock-based compensation relating to RSUs of approximately $63.5 million, which is expected to be recognized over a weighted-average period of 2.2 years.

Nonqualified Stock Options

The following summarizes nonqualified stock option activity:

	Number of Options			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
	(in thousands)					(in years)		(in thousands)
Options outstanding as of December 31, 2020		—		$	—
Granted		235			16.52
Exercised		—			—
Canceled		(15	)		25.86
Expired		—			—
Options outstanding as of December 31, 2021		220			15.88		9.7	$	20

As of December 31, 2021, there were no nonqualified stock options vested or exercisable. The weighted-average grant date fair value of options granted during the year ended December 31, 2021 was $8.79 per share. The Company had unrecognized stock-based compensation relating to unvested nonqualified stock options of approximately $1.8 million, which is expected to be recognized over a weighted-average period of 3.6 years, as of December 31, 2021.

The following table presents the assumptions used in the Black-Scholes model to determine the fair value of nonqualified stock options for the year ended December 31, 2021. Black-Scholes assumptions have not been disclosed for any other periods presented in relation to nonqualified stock options as there were no nonqualified stock options granted in those periods.

	Year Ended December 31,
	2021
Risk free interest rate		1.2	%
Expected volatility		61.1	%
Expected term (in years)		5.9
Expected dividend yield		0.0	%

Risk-Free Interest Rate. The Company bases the risk-free interest rate assumption for equity awards on the rates for U.S. Treasury securities with maturities similar to those of the expected term of the award being valued.

Expected Volatility. Due to the limited trading history of the Company’s common stock, the expected volatility assumption is based on volatilities of a peer group of similar companies whose share prices are publicly available. The Company will continue to apply this process until a sufficient amount of historical information regarding the volatility of the Company’s own stock price becomes available.

Expected Term. Given the insufficient historical data relating to nonqualified stock option exercises, the expected term assumption is based on expected terms of a peer group of similar companies whose expected terms are publicly available. The Company will continue to apply this process until a sufficient amount of historical information regarding the Company’s nonqualified stock option exercises becomes available.

Expected Dividend Yield. The Company’s expected dividend yield assumption is zero as it has never paid dividends and has no present intention to do so in the future.

Issuance of Shares

Upon vesting of shares under the LTIP, we will issue treasury stock. If treasury stock is not available, Class A common stock will be issued.

Income Taxes and Tax Receivable Agreement

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Income Taxes and Tax Receivable Agreement

10. Income Taxes and Tax Receivable Agreement

The provision for income taxes differs from the amount of income tax computed by applying the applicable U.S. statutory federal income tax rate of 21% to income before provision of income taxes due to Viant Technology LLC’s pass-through structure for U.S. income tax purposes and the valuation allowance against the deferred tax asset. The Company did not recognize an income tax expense/(benefit) on its share of pre-tax book income (loss), exclusive of the noncontrolling interest of 77.5% due to the full valuation allowance against its deferred tax assets, resulting in an effective tax rate ("ETR") of 0.0% for the 12 months ended December 31, 2021.

The Company is the managing member of Viant Technology LLC and, as a result, consolidates the financial results of Viant Technology LLC in the consolidated financial statements. Viant Technology LLC is a pass-through entity for U.S. federal and most applicable state and local income tax purposes following a corporate reorganization effected in connection with the IPO. As an entity classified as a partnership for tax purposes, Viant Technology LLC is not subject to U.S. federal and certain state and local income taxes. Prior to the IPO during 2021, the Company did not exist and thus no income tax expense was recognized for Viant Technology LLC for the periods ended December 31, 2020 and 2019 and no deferred tax assets or liabilities existed as of December 31, 2020. Subsequent to the IPO, any taxable income or loss generated by Viant Technology LLC is passed through to and included in the taxable income or loss of its members, including the Company. The Company is taxed as a corporation and pays corporate federal, state and local taxes with respect to income allocated from Viant Technology LLC, based on Viant Technology, Inc.'s 22.5% economic interest in Viant Technology LLC.

The provision for income taxes attributable to the Company consisted of the following for the year ended December 31, 2021:

	Year Ended December 31,
	2021
	(in thousands)
Current:	$	—
U.S. federal income tax		—
State and local income tax		—
Foreign income tax		—

Deferred:
U.S. federal income tax		—
State and local income tax		—
Foreign income tax		—

Income tax (benefit) provision	$	—

The effective tax rate for the year ended December 31, 2021 was 0.0%. A reconciliation of the statutory tax rate to the effective tax rate for the period presented is as follows:

	Year Ended December 31,
	2021

Income tax expense at federal statutory rate		21.0	%
Income passed through to noncontrolling interests		(16.7	)%
State and local taxes, net of federal benefit		0.6	%
Permanent items		0.7	%
Stock-based compensation		(3.2	)%
Valuation allowance		(2.4	)%
Total effective rate		0.0	%

Set forth below are the tax effects of temporary differences that give rise to a significant portion of the deferred tax assets and deferred tax liabilities:

	Year Ended December 31,
	2021
	(in thousands)
Deferred tax assets
Net operating loss carryforwards	$	1,321
Investment in Partnership		7,909
Other, net		108
Subtotal		9,338
Valuation allowance		(9,338	)
Total deferred tax assets		—

Deferred tax liabilities
Other, net		—
Total deferred tax liabilities		—
Net deferred tax (liabilities) assets	$	—

In assessing the realizability of deferred tax assets, the Company considers whether it is probable that some or all of the deferred tax assets will not be realized. In determining whether the deferred taxes are realizable, the Company considers the period of expiration of the tax asset, historical and projected taxable income, and tax liabilities for the tax jurisdiction in which the tax asset is located. Valuation allowances are provided to reduce the amounts of deferred tax assets to an amount that is more likely than not to be realized based on an assessment of positive and negative evidence, including estimates of future taxable income necessary to realize future deductible amounts. As of December 31, 2021, the Company has recorded a valuation allowance against its deferred tax assets of $9.3 million, as management cannot conclude whether it is more likely than not that these deferred tax assets will be realized.

As of December 31, 2021, the Company has federal net operating losses of approximately $5.5 million. As of December 31, 2021, the Company has state net operating losses of approximately $8.1 million. The federal net operating losses carry forward indefinitely and state net operating losses begin to expire in 2031.

As of December 31, 2021, the Company has no significant unrecognized tax benefits and has not recorded interest and penalties related to uncertain tax positions.

The Company is subject to U.S. federal and state income taxes. The Company's U.S. federal and state returns are open to examination for all periods ending December 31, 2020 and thereafter. However, to the extent allowed by law the tax authorities may have the right to examine prior periods where net operating losses were generated and carried forward, and make adjustments up to the amount of the net operating loss or credit carry forward amount.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 17
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Earnings (Loss) Per Share/Unit

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Earnings (Loss) Per Share/Unit

11. Earnings (Loss) Per Share/Unit

Prior to the Reorganization Transactions that occurred on February 12, 2021, the Viant Technology LLC membership structure included certain convertible preferred units and common units. As a result of the Reorganization Transactions, Class B units of Viant Technology LLC are exchangeable in the future for Class A common stock of the Company. As the conversion of Viant Technology LLC preferred and common units to Class B units was not done in a proportionate manner with respect to the rights and economic interests of the former Viant Technology LLC unit holders compared to those of the new Class B unit/shareholders in Viant Technology LLC and Viant Technology Inc., we do not believe it is appropriate to retrospectively adjust these units. Accordingly, the earnings per unit calculation presented for the years ended December 31, 2020 and 2019 reflect units of the membership structure prior to the Reorganization Transactions.

For the year ended December 31, 2021, basic net loss per share has been calculated by dividing net loss attributable to Class A common stockholders for the period subsequent to the Reorganization Transactions, by the weighted average number of shares of Class A common stock outstanding for the same period. Shares of Class A

common stock are weighted for the portion of the period in which the shares were outstanding. Diluted net loss per share has been calculated in a manner consistent with that of basic net loss per share while considering all potentially dilutive shares of Class A common stock outstanding during the period.

For the years ended December 31, 2020 and 2019, basic earnings (loss) per unit represents net income (loss) divided by the weighted-average number of units outstanding. Diluted net income (loss) per share has been computed in a manner consistent with that of basic net loss per share while considering all shares of potentially dilutive common units that were outstanding during the period, inclusive of the convertible preferred units using the if-converted method and the incentive common units using the treasury stock method, if dilutive. For the year ended December 31, 2020, there were no potential dilutive units related to incentive common units as they were all issued as of the beginning of the year.

The undistributed earnings for year ended December 31, 2020 have been allocated based on the participation rights of the convertible preferred and common units as if the earnings for the period have been distributed. As the participation in distributed and undistributed earnings is identical for both classes, the distributed and undistributed earnings are allocated on a proportionate basis.

The following table presents the calculation of basic and diluted net earnings (loss) per share/unit for the year ended December 31, 2021, the period following the Reorganization Transactions, and for the years ended December 31, 2020 and 2019. See Note 2 for additional information related to basic and diluted earnings (loss) per share/unit.

	Year Ended December 31,
	2021			2020			2019
	(in thousands, except per unit data)
Numerator
Net income (loss)	$	(37,609	)	$	20,638		$	9,924
Deemed contribution of 2016 convertible preferred unit interest		—			—			45,000
Deemed dividend upon issuance of 2019 convertible preferred units		—			—			(27,558	)
Adjusted net income (loss) attributable to all unitholders		(37,609	)		20,638			27,366
Less: Dividend paid to preferred unitholders		—			(3,000	)		—
Adjusted net income (loss) attributable to common unitholders		(37,609	)		17,638			27,366
Less: Dividend paid to common unitholders		—			(2,000	)		—
Undistributed earnings (loss) attributable to all unitholders		(37,609	)		15,638			27,366
Less: Undistributed earnings attributable to participating securities		—			(9,383	)		(18,787	)
Less: Net loss attributable to noncontrolling interests		(29,867	)		—			—
Net income (loss) attributable to Viant Technology Inc./common unitholders	$	(7,742	)	$	6,255		$	8,579
Denominator
Weighted-average shares of Class A common stock/units outstanding—basic		12,364			400			274
Effect of dilutive securities:
Convertible preferred units		—			600			600
Incentive common units		—			—			126
Weighted-average shares of Class A common stock/units outstanding—diluted		12,364			1,000			1,000
Earnings (loss) per Class A common stock/unit—basic
Distributed earnings per unit—basic	$	—		$	5.00		$	—
Undistributed earnings (loss) per unit—basic		(0.63	)		15.64			31.31
Total earnings (loss) per Class A common stock/unit—basic	$	(0.63	)	$	20.64		$	31.31
Earnings (loss) per Class A common stock/unit—diluted
Total earnings (loss) per Class A common stock/unit—diluted	$	(0.63	)	$	20.64		$	27.37
Anti-dilutive shares/units excluded from earnings (loss) per share of Class A common stock/unit—diluted:
Convertible preferred units		—			—			—
Incentive common units		—			—			—
Restricted stock units		3,033			—			—
Nonqualified stock options		220			—			—
Shares of Class B common stock		47,107			—			—
Total shares excluded from earnings (loss) per share of Class A common stock/unit—diluted		50,360			—			—

Noncontrolling Interests

12 Months Ended

Dec. 31, 2021

Noncontrolling Interest [Abstract]

Noncontrolling Interests

12. Noncontrolling Interests

We are the sole managing member of Viant Technology LLC and, as a result, consolidate the financial results of Viant Technology LLC. We report noncontrolling interests representing the economic interests in Viant Technology LLC held by the other members of Viant Technology LLC. The Viant Technology LLC Agreement classifies the interests acquired by the Company as Class A units, reclassified the interests held by the continuing

members of Viant Technology LLC as Class B units and permits the continuing members of Viant Technology LLC to exchange Class B units for shares of Class A common stock on a one-for-one basis or, at the election of Viant Technology Inc., for cash at the current fair value on the date of the exchange. Changes in the Company’s ownership interest in Viant Technology LLC while retaining control of Viant Technology LLC will be accounted for as equity transactions. As such, future redemptions or direct exchanges of Class B units in Viant Technology LLC by the other members and future issuances of Class A common stock under the 2021 LTIP will result in a change in ownership, where the Company will rebalance the noncontrolling interest balance as of the reporting date, offset by a change in additional-paid-in-capital.

The following table summarizes the ownership of Viant Technology LLC:

	As of December 31, 2021					As of February 12, 2021
Owner	Units Owned		Ownership Percentage			Units Owned		Ownership Percentage
Viant Technology Inc.		13,704,638		22.5	%		11,500,000		19.5	%
Noncontrolling interests		47,107,130		77.5	%		47,435,559		80.5	%
Total		60,811,768		100.0	%		58,935,559		100.0	%

During the year ended December 31, 2021, noncontrolling interests exchanged 0.3 million Class B units of Viant Technology, LLC for 0.3 million shares of the Company’s Class A common stock, which also resulted in the cancellation of 0.3 million shares of the Company’s Class B common stock that was previously held by noncontrolling interests with no additional consideration provided.

The following table presents the effect of changes in the Company’s ownership interest in Viant Technology LLC on the Company’s equity for the period indicated:

	Year Ended December 31, 2021
	(in thousands)
Net loss attributable to Viant Technology Inc.	$	(7,742	)
Transfers to noncontrolling interests:
Decrease in the additional-paid-in-capital of Viant Technology Inc. as a result of ownership changes in Viant Technology LLC		(44,361	)
Net decrease in equity of Viant Technology Inc. due to equity interest transactions with noncontrolling interests	$	(52,103	)

Commitments and Contingencies

12 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

13. Commitments and Contingencies

Lease Commitments

Future minimum payments under the Company’s non-cancelable operating leases, which are primarily related to building leases, as of December 31, 2021 are as follows:

Year Ending December 31,	(in thousands)
2022	$	3,039
2023		3,953
2024		3,060
2025		2,991
2026 and thereafter		16,713
Total minimum payments	$	29,756

Legal Matters

From time to time, the Company is subject to various legal proceedings and claims, either asserted or unasserted, that arise in the ordinary course of business. Although the outcome of the various legal proceedings and claims cannot be predicted with certainty, management does not believe that any of these proceedings or other claims will have a material effect on the Company’s business, financial condition, results of operations or cash flows.

Guarantees and Indemnities

12 Months Ended

Dec. 31, 2021

Guarantees And Indemnities [Abstract]

Guarantees and Indemnities

14. Guarantees and Indemnities

The Company has made no significant contractual guarantees for the benefit of third parties. However, in the ordinary course of business, the Company may provide indemnifications of varying scope and terms to customers, vendors, lessors, business partners and other parties with respect to certain matters, including, but not limited to, losses arising out of breach of such agreements, services to be provided by the Company or from intellectual property infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with directors and certain officers and employees that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors, officers or employees. The Company is not aware of indemnification claims that could have a material effect on the Company’s consolidated financial statements. Accordingly, no amounts for any obligation have been recorded as of December 31, 2021 and 2020.

Related Parties

12 Months Ended

Dec. 31, 2021

Related Parties

15. Related Parties

The Company derives a small percentage of its revenue from Meredith Corporation and its subsidiaries (“Meredith Corporation”), which previously held equity interests in the Company through the Former Holdco. The Company also purchases certain inventory from Meredith Corporation. These purchases and sales are made under standard customer agreements that outline the terms of the transactions. As discussed in Note 8, the Company retired all outstanding shares held by this related party on October 31, 2019 and, as of such date, Meredith Corporation ceased to be a related party to the Company. Accordingly, the Company has excluded all transactions with Meredith Corporation subsequent to October 31, 2019 from the amounts disclosed below.

Related parties incurred a total of $0.3 million in expenses on our behalf during the year ended December 31, 2021 and $0.3 million of these expenses were unpaid and recorded within accounts payable and accrued liabilities as of December 31, 2021.

The Company recorded no revenue from its transactions with related parties during year ended December 31, 2021 and 2020, and $3.7 million during the year ended December 31, 2019. The Company recorded no purchases from related parties during years ended December 31, 2021 and 2020, and $0.3 million during the year ended December 31, 2019.

As of December 31, 2021 and 2020, no amounts were due to or due from related parties, other than those mentioned above.

Basis of Presentation and Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2021

Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]

Basis of Presentation and Principles of Consolidation

Use of Estimates

Segment Information

Revenue Recognition

•

Identification of a contract with a customer;

•

Identification of the performance obligations in the contract;

•

Determination of the transaction price;

•

Allocation of the transaction price to the performance obligations in the contract; and

•

Recognition of revenue when or as the performance obligations are satisfied.

Operating Expenses

We classify our operating expenses into the following four categories. Each expense category includes overhead such as rent and occupancy charges, which is allocated based on headcount.

Stock-Based Compensation

Unit-Based Compensation

Earnings (Loss) Per Share

Earnings (Loss) Per Unit

unit considers the impact of potentially dilutive securities except in periods in which there is a loss because the inclusion of the potential common units would have an anti-dilutive effect.

Cash

The carrying amounts reflected in the consolidated balance sheets for cash approximate the fair value, consisting of cash on hand and at the bank.

Accounts Receivable, Net of Allowances

The following table presents changes in the allowance for doubtful accounts:

	Year Ended December 31,
	2021			2020
	(in thousands)
Beginning balance	$	335		$	1,528
Provision for (recovery of) doubtful accounts		(107	)		(584	)
Write-offs, net of recoveries		(174	)		(609	)
Ending balance	$	54		$	335

Deferred Offering Costs

Property, Equipment and Software, Net

	Years
Computer equipment	3-5
Purchased software		3
Capitalized software development costs		3
Furniture, fixtures and office equipment		10
Leasehold improvements	*

*	Leasehold improvements are depreciated on a straight-line basis over the term of the lease, or the useful life of the assets, whichever is shorter.

Capitalized Software Development Costs

Capitalized Interest

Impairment of Long-Lived Assets

Goodwill

Paycheck Protection Program Loan

Fair Value of Financial Instruments

•

Level 1: Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date.

•

Level 2: Other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability.

•

Financial Instruments Not Recorded at Fair Value on a Recurring Basis

Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis

There were no assets or liabilities measured at fair value using Level 3 inputs for the periods presented.

Leases

Concentration of Risk

The following table provides the Company’s concentrations of credit risk with respect to advertising agency holding companies as a percentage of the Company’s total revenues:

	Year Ended December 31,
Advertising Agency Holding Company	2021			2020
A		15.5	%	*
B		14.2	%		13.2	%
C	*				13.3	%

* Less than 10% of total revenues.

Foreign Currency Transactions and Translation

Related Party Relationships

Income Taxes

Tax Receivable Agreement

Treasury Stock

Recent Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements

Recently Adopted Accounting Pronouncements

Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Summary of Changes in Allowance for Doubtful Accounts

The following table presents changes in the allowance for doubtful accounts:

	Year Ended December 31,
	2021			2020
	(in thousands)
Beginning balance	$	335		$	1,528
Provision for (recovery of) doubtful accounts		(107	)		(584	)
Write-offs, net of recoveries		(174	)		(609	)
Ending balance	$	54		$	335

Schedule of Estimated Useful Lives of Property, Equipment and Software

	Years
Computer equipment	3-5
Purchased software		3
Capitalized software development costs		3
Furniture, fixtures and office equipment		10
Leasehold improvements	*

*	Leasehold improvements are depreciated on a straight-line basis over the term of the lease, or the useful life of the assets, whichever is shorter.

Advertising Agency Risk

Schedules of Concentrations of Credit Risk

The following table provides the Company’s concentrations of credit risk with respect to advertising agency holding companies as a percentage of the Company’s total revenues:

	Year Ended December 31,
Advertising Agency Holding Company	2021			2020
A		15.5	%	*
B		14.2	%		13.2	%
C	*				13.3	%

* Less than 10% of total revenues.

Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

Summary of Disaggregation of Revenue

The disaggregation of revenue was as follows:

	Year Ended December 31,
	2021		2020		2019
Revenue	(in thousands)
Over time	$	3,880	$	4,612	$	6,237
Point in time		220,247		160,639		158,655
Total revenue	$	224,127	$	165,251	$	164,892

Summary of Changes in Deferred Revenue

The follow table summarizes the changes in deferred revenue balances:

	Year Ended December 31,
	2021			2020
	(in thousands)
Beginning balance	$	8,337		$	10,030
Recognition of deferred revenue		(1,786	)		(1,693	)
Deferral of revenue		—			—
Ending balance	$	6,551		$	8,337

Property, Equipment and Software, Net (Tables)

12 Months Ended

Dec. 31, 2021

Property Plant And Equipment [Abstract]

Schedule of Major Classes of Property, Equipment and Software

Major classes of property, equipment and software were as follows:

	As of December 31,
	2021			2020
	(in thousands)
Capitalized software development costs	$	61,490		$	43,627
Computer equipment		1,823			1,575
Purchased software		32			32
Furniture, fixtures and office equipment		1,159			1,087
Leasehold improvements		2,178			2,115
Total property, equipment and software		66,682			48,436
Less: Accumulated depreciation		(44,351	)		(34,607	)
Total property, equipment and software, net	$	22,331		$	13,829

Schedule of Depreciation

Depreciation recorded in the consolidated statements of operations was as follows:

	Year Ended December 31,
	2021		2020		2019
	(in thousands)
Platform operations	$	7,688	$	6,638	$	6,832
Sales and marketing		—		—		—
Technology and development		1,599		1,608		1,537
General and administrative		625		631		554
Total	$	9,912	$	8,877	$	8,923

Schedule of Interest Cost

Interest cost recorded in the consolidated balance sheets and consolidated statements of operations was as follows:

	Year Ended December 31,
	2021		2020		2019
	(in thousands)
Amount charged to expense	$	865	$	1,055	$	4,105
Amount capitalized within property, equipment and software, net		20		31		44
Total interest cost	$	885	$	1,087	$	4,149

Goodwill and Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Balances of Intangibles Assets and Accumulated Amortization

The balances of intangibles assets and accumulated amortization are as follows:

	As of December 31, 2021
	Remaining Weighted Average Useful Life		Gross Amount		Accumulated Amortization			Net Carrying Amount
	(in years)		(in thousands)
Developed technology		1.1	$	4,927	$	(4,169	)	$	758
Customer relationships		2.1		2,300		(1,615	)		685
Trademarks/tradenames		4.0		1,400		(1,057	)		343
Total			$	8,627	$	(6,841	)	$	1,786

	As of December 31, 2020
	Remaining Weighted Average Useful Life		Gross Amount		Accumulated Amortization			Net Carrying Amount
	(in years)		(in thousands)
Developed technology		2.1	$	4,927	$	(3,469	)	$	1,458
Customer relationships		3.1		2,300		(1,287	)		1,013
Trademarks/tradenames		4.2		1,400		(856	)		544
Total			$	8,627	$	(5,612	)	$	3,015

Summary of Amortization Recorded in Consolidated Statements of Operations

Amortization recorded in the consolidated statements of operations was as follows:

	Year Ended December 31,
	2021		2020		2019
	(in thousands)
Platform operations	$	700	$	700	$	703
Sales and marketing		—		—		—
Technology and development		—		—		—
General and administrative		529		529		529
Total	$	1,229	$	1,229	$	1,232

Summary of Estimated Future Amortization of Intangible Assets

Estimated future amortization of intangible assets as of December 31, 2021 is as follows:

Year ending December 31,	(in thousands)
2022	$	1,119
2023		467
2024		107
2025		80
2026		13
Thereafter		—
Total	$	1,786

Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2021

Payables And Accruals [Abstract]

Summary of Accrued Liabilities

The Company’s accrued liabilities consisted of the following:

	As of December 31,
	2021		2020
	(in thousands)
Accrued traffic acquisition costs	$	30,942	$	22,667
Other accrued liabilities		3,144		2,010
Total accrued liabilities	$	34,086	$	24,677

Long-Term Debt and Revolving Credit Facility (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Schedule of Debt and Revolving Credit Facilities

The Company’s debt and revolving credit facilities consisted of the following:

	As of December 31,
	2021		2020
	(in thousands)
Revolving credit facility	$	17,500	$	17,500
PPP Loan		—		6,035
Total debt		17,500		23,535
Less: Current portion of long-term debt		—		(3,353	)
Total long-term debt	$	17,500	$	20,182

Convertible Preferred Units and Common Units (Tables)

12 Months Ended

Dec. 31, 2021

Convertible Preferred Units And Common Units [Abstract]

Summary of Valuation Assumptions Used in Fair Value Calculation of Common Units

The following outlines the option valuation assumptions used in the fair value calculation of common units:

Risk-free interest rate		2.28	%
Volatility		70	%
Expected term	< 2 years
Discount for lack of marketability		29	%

Stock/Unit-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Stock-based Compensation

Stock/Unit-based compensation recorded in the consolidated statements of operations was as follows:

	Year Ended December 31,
	2021		2020		2019
	(in thousands)
Platform operations	$	13,096	$	—	$	42
Sales and marketing		25,639		—		44
Technology and development		12,373		—		82
General and administrative		17,714		—		922
Total	$	68,822	$	—	$	1,090

Summary of RSU Activity

The following summarizes RSU activity:

	Number of Shares			Weighted-Average Grant-Date Fair Value		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
	(in thousands)					(in years)		(in thousands)
RSUs outstanding as of December 31, 2020		—		$	—
Granted		6,488			24.62
Vested		(2,792	)		24.88
Canceled/forfeited		(663	)		25.02
RSUs outstanding as of December 31, 2021		3,033			24.29		1.22	$	29,433

Incentive Units

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Stock Option/Incentive Activity

The following table summarizes the incentive unit activity for the periods presented:

	Year Ended December 31,
	2021		2020		2019
Incentive units outstanding, beginning of period		—		—		160,000
Granted		—		—		4,000
Forfeited		—		—		(4,000	)
Vested		—		—		(160,000	)
Incentive units outstanding, end of period		—		—		—

Summary of Assumptions used in Fair Value of Stock Options Granted

Risk-free interest rate		0.9	%
Volatility		55.4	%
Expected Term	2.5 years
Discount for lack of marketability		55	%

Nonqualified Stock Options

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Stock Option/Incentive Activity

Nonqualified Stock Options

The following summarizes nonqualified stock option activity:

	Number of Options			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
	(in thousands)					(in years)		(in thousands)
Options outstanding as of December 31, 2020		—		$	—
Granted		235			16.52
Exercised		—			—
Canceled		(15	)		25.86
Expired		—			—
Options outstanding as of December 31, 2021		220			15.88		9.7	$	20

Summary of Assumptions used in Fair Value of Stock Options Granted

	Year Ended December 31,
	2021
Risk free interest rate		1.2	%
Expected volatility		61.1	%
Expected term (in years)		5.9
Expected dividend yield		0.0	%

Income Taxes and Tax Receivable Agreement (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Provision for Income Taxes

The provision for income taxes attributable to the Company consisted of the following for the year ended December 31, 2021:

	Year Ended December 31,
	2021
	(in thousands)
Current:	$	—
U.S. federal income tax		—
State and local income tax		—
Foreign income tax		—

Deferred:
U.S. federal income tax		—
State and local income tax		—
Foreign income tax		—

Income tax (benefit) provision	$	—

Schedule of Effective Income Tax Rate Reconciliation

The effective tax rate for the year ended December 31, 2021 was 0.0%. A reconciliation of the statutory tax rate to the effective tax rate for the period presented is as follows:

	Year Ended December 31,
	2021

Income tax expense at federal statutory rate		21.0	%
Income passed through to noncontrolling interests		(16.7	)%
State and local taxes, net of federal benefit		0.6	%
Permanent items		0.7	%
Stock-based compensation		(3.2	)%
Valuation allowance		(2.4	)%
Total effective rate		0.0	%

Significant Portion of Deferred Tax Assets and Deferred Tax Liabilities

Set forth below are the tax effects of temporary differences that give rise to a significant portion of the deferred tax assets and deferred tax liabilities:

	Year Ended December 31,
	2021
	(in thousands)
Deferred tax assets
Net operating loss carryforwards	$	1,321
Investment in Partnership		7,909
Other, net		108
Subtotal		9,338
Valuation allowance		(9,338	)
Total deferred tax assets		—

Deferred tax liabilities
Other, net		—
Total deferred tax liabilities		—
Net deferred tax (liabilities) assets	$	—

Earnings (Loss) Per Share/Unit (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Calculation of Basic and Diluted Net Earnings (Loss) Per Share/Unit

	Year Ended December 31,
	2021			2020			2019
	(in thousands, except per unit data)
Numerator
Net income (loss)	$	(37,609	)	$	20,638		$	9,924
Deemed contribution of 2016 convertible preferred unit interest		—			—			45,000
Deemed dividend upon issuance of 2019 convertible preferred units		—			—			(27,558	)
Adjusted net income (loss) attributable to all unitholders		(37,609	)		20,638			27,366
Less: Dividend paid to preferred unitholders		—			(3,000	)		—
Adjusted net income (loss) attributable to common unitholders		(37,609	)		17,638			27,366
Less: Dividend paid to common unitholders		—			(2,000	)		—
Undistributed earnings (loss) attributable to all unitholders		(37,609	)		15,638			27,366
Less: Undistributed earnings attributable to participating securities		—			(9,383	)		(18,787	)
Less: Net loss attributable to noncontrolling interests		(29,867	)		—			—
Net income (loss) attributable to Viant Technology Inc./common unitholders	$	(7,742	)	$	6,255		$	8,579
Denominator
Weighted-average shares of Class A common stock/units outstanding—basic		12,364			400			274
Effect of dilutive securities:
Convertible preferred units		—			600			600
Incentive common units		—			—			126
Weighted-average shares of Class A common stock/units outstanding—diluted		12,364			1,000			1,000
Earnings (loss) per Class A common stock/unit—basic
Distributed earnings per unit—basic	$	—		$	5.00		$	—
Undistributed earnings (loss) per unit—basic		(0.63	)		15.64			31.31
Total earnings (loss) per Class A common stock/unit—basic	$	(0.63	)	$	20.64		$	31.31
Earnings (loss) per Class A common stock/unit—diluted
Total earnings (loss) per Class A common stock/unit—diluted	$	(0.63	)	$	20.64		$	27.37
Anti-dilutive shares/units excluded from earnings (loss) per share of Class A common stock/unit—diluted:
Convertible preferred units		—			—			—
Incentive common units		—			—			—
Restricted stock units		3,033			—			—
Nonqualified stock options		220			—			—
Shares of Class B common stock		47,107			—			—
Total shares excluded from earnings (loss) per share of Class A common stock/unit—diluted		50,360			—			—

Noncontrolling Interests (Tables)

12 Months Ended

Dec. 31, 2021

Noncontrolling Interest [Abstract]

Summary Ownership of Viant Technology LLC

The following table summarizes the ownership of Viant Technology LLC:

	As of December 31, 2021					As of February 12, 2021
Owner	Units Owned		Ownership Percentage			Units Owned		Ownership Percentage
Viant Technology Inc.		13,704,638		22.5	%		11,500,000		19.5	%
Noncontrolling interests		47,107,130		77.5	%		47,435,559		80.5	%
Total		60,811,768		100.0	%		58,935,559		100.0	%

Summary of Effect of Changes in Ownership Interest in Viant Technology LLC on Equity

The following table presents the effect of changes in the Company’s ownership interest in Viant Technology LLC on the Company’s equity for the period indicated:

	Year Ended December 31, 2021
	(in thousands)
Net loss attributable to Viant Technology Inc.	$	(7,742	)
Transfers to noncontrolling interests:
Decrease in the additional-paid-in-capital of Viant Technology Inc. as a result of ownership changes in Viant Technology LLC		(44,361	)
Net decrease in equity of Viant Technology Inc. due to equity interest transactions with noncontrolling interests	$	(52,103	)

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

Future Minimum Payments Under Non-cancelable Operating Leases

Future minimum payments under the Company’s non-cancelable operating leases, which are primarily related to building leases, as of December 31, 2021 are as follows:

Year Ending December 31,	(in thousands)
2022	$	3,039
2023		3,953
2024		3,060
2025		2,991
2026 and thereafter		16,713
Total minimum payments	$	29,756

Nature of Operations - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Feb. 12, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Nature Of Operations [Line Items]
Preferred stock, shares authorized	10,000,000	10,000,000
Common units, units outstanding		0	400,000	400,000
Proceeds from issuance of common stock, net of underwriting discounts		$ 232,500
Common stock, voting rights		The Class B stockholders and Class A stockholders initially had 80.5% and 19.5%, respectively, of the combined voting power of the Company’s common stock. The Class A common stock outstanding represents 100% of the rights of the holders of all classes of the Company’s outstanding common stock to share in distributions from the Company, except for the right of Class B stockholders to receive the par value of the Class B common stock upon our liquidation, dissolution or winding up or an exchange of Class B units
Underwriters
Nature Of Operations [Line Items]
Common stock shares issued and sold	10,000,000
Sale of stock, price per share	$ 25.00
Proceeds from issuance of common stock, net of underwriting discounts	$ 250,000
Payments of stock issuance costs	$ 17,500
Class A Common Stock
Nature Of Operations [Line Items]
Common stock, shares authorized	450,000,000	450,000,000
Common stock shares issued to continuing members		300,000
Underwrites options exercised shares issued	1,500,000
Common stock voting rights percentage	19.50%
Percentage of voting rights of outstanding common stock	100.00%
Class B Common Stock
Nature Of Operations [Line Items]
Common stock, shares authorized	150,000,000	150,000,000
Common stock shares issued to continuing members		(300,000)
Common stock voting rights percentage	80.50%
Class B Common Stock \| Viant Technology LLC
Nature Of Operations [Line Items]
Common stock shares issued for each membership unit	1
Common stock shares issued to continuing members	48,935,559
Continuing Members Class B Units \| Viant Technology LLC
Nature Of Operations [Line Items]
Continuing members units exchange description		one-for-one basis
Common units, units outstanding	48,935,559
Class A Units
Nature Of Operations [Line Items]
Members equity units received in exchange of units	1,500,000
Class A Units \| Viant Technology LLC
Nature Of Operations [Line Items]
Payments to acquire units	$ 232,500
Member units acquired, units	10,000,000

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions		12 Months Ended
	Apr. 14, 2020 USD ($)	Dec. 31, 2021 USD ($) Customer Supplier	Dec. 31, 2020 USD ($) Customer Supplier	Dec. 31, 2019 USD ($) Customer	Feb. 28, 2021 USD ($)
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Advertising costs		$ 4.1	$ 1.2	$ 1.0
Share-based compensation arrangement by share-based payment award, initial public offering lock-up period		180 days
Vesting, description		A portion of RSUs granted during the year ended December 31, 2021 to certain employees and board members, pursuant to the 2021 LTIP, vested upon expiration of the 180 day IPO lock-up period during the fiscal year ended December 31, 2021. The remainder of RSUs and nonqualified stock options granted to employees will vest through the applicable vesting dates. RSUs generally vest over a period of four years, contingent upon employment on the vesting date. RSUs awarded to board members upon their appointment will vest on the third anniversary of the grant date and RSUs awarded to board members annually will vest on the first anniversary of the grant date. Nonqualified stock options will generally vest based on 4 years of continuous service and have 10-year contractual terms.
Vesting period		4 years
Nonqualified stock options, contractual terms		10 years
Rent expense		$ 4.4	4.2	$ 4.7
Current portion of deferred rent		$ 0.2	$ 0.4
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]		Other current liabilities	Other current liabilities
Noncurrent portion of deferred rent		$ 0.8	$ 0.5
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Other long-term liabilities	Other long-term liabilities
Tax receivable agreement required to make payments to shareholders realized percentage of tax benefits in event that exchange of units to shares		85.00%
Tax receivable agreement expected remaining tax benefit percentage		15.00%
ASU 2018-15
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]		true
Change in accounting principle, accounting standards update, adoption date		Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect [true false]		true
ASU 2019-12
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]		true
Change in accounting principle, accounting standards update, adoption date		Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect [true false]		true
SOFR
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Tax receivable agreement interest payments accrued basis spread rate		5.00%
Viant Technology LLC
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of interest held		22.50%	22.50%
Credit Concentration Risk \| Accounts Receivable
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of customer \| Customer		2	1
Credit Concentration Risk \| Revenue
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of customer \| Customer		0	0	0
Concentration risk, percentage		10.00%	10.00%	10.00%
Credit Concentration Risk \| Customer One \| Accounts Receivable
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage		13.20%	13.70%
Credit Concentration Risk \| Customer Two \| Accounts Receivable
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage		12.30%
Supplier Concentration Risk \| Accounts Payable and Accrued Liabilities
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of supplier \| Supplier		1	3
Supplier Concentration Risk \| Accounts Payable and Accrued Liabilities \| Supplier One
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage		16.80%	15.50%
Supplier Concentration Risk \| Accounts Payable and Accrued Liabilities \| Supplier Two
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			11.50%
Supplier Concentration Risk \| Accounts Payable and Accrued Liabilities \| Supplier Three
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			10.90%
Paycheck Protection Program Loan
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Proceeds from Issuance of Long-term Debt	$ 6.0
IPO
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Deferred offering costs capitalized			$ 2.2		$ 4.3

Basis of Presentation and Summary of Significant Accounting Policies - Summary of Changes in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]
Beginning balance	$ 335	$ 1,528
Provision for (recovery of) doubtful accounts	(107)	(584)	$ 613
Write-offs, net of recoveries	(174)	(609)
Ending balance	$ 54	$ 335	$ 1,528

Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives of Property, Equipment and Software (Details)	12 Months Ended
	Dec. 31, 2021
Computer Equipment \| Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and software, estimated useful lives	3 years
Computer Equipment \| Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and software, estimated useful lives	5 years
Purchased Software
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and software, estimated useful lives	3 years
Capitalized Software Development Costs
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and software, estimated useful lives	3 years
Furniture, Fixtures and Office Equipment
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and software, estimated useful lives	10 years

Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Concentrations of Credit Risk (Details) - Advertising Agency Risk - Consolidated Revenue	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Advertising Agency A
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	15.50%
Advertising Agency B
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	14.20%	13.20%
Advertising Agency C
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage		13.30%

Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Concentrations of Credit Risk (Parenthetical) (Details) - Advertising Agency Risk - Consolidated Revenue - Maximum	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Advertising Agency A
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage		10.00%
Advertising Agency C
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%

Revenue - Summary of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Revenue	$ 224,127	$ 165,251	$ 164,892
Over-Time Revenue
Disaggregation Of Revenue [Line Items]
Revenue	3,880	4,612	6,237
Point-in-Time Revenue
Disaggregation Of Revenue [Line Items]
Revenue	$ 220,247	$ 160,639	$ 158,655

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130543-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

+ Details

Revenue - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Expected Duration of Greater Than One Year
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligation amount	$ 6.6	$ 9.2
Expected to be Recognized within One Year
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligation amount	$ 1.3	$ 3.6

Revenue - Summary of Changes in Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Beginning balance	$ 8,337	$ 10,030
Recognition of deferred revenue	(1,786)	(1,693)
Ending balance	$ 6,551	$ 8,337

Property, Equipment and Software, Net - Schedule of Major Classes of Property, Equipment and Software (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Total property, equipment and software	$ 66,682	$ 48,436
Less: Accumulated depreciation	(44,351)	(34,607)
Total property, equipment and software, net	22,331	13,829
Capitalized Software Development Costs
Property Plant And Equipment [Line Items]
Total property, equipment and software	61,490	43,627
Computer Equipment
Property Plant And Equipment [Line Items]
Total property, equipment and software	1,823	1,575
Purchased Software
Property Plant And Equipment [Line Items]
Total property, equipment and software	32	32
Furniture, Fixtures and Office Equipment
Property Plant And Equipment [Line Items]
Total property, equipment and software	1,159	1,087
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property, equipment and software	$ 2,178	$ 2,115

Property, Equipment and Software, Net - Schedule of Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Depreciation	$ 9,912	$ 8,877	$ 8,923
Platform Operations
Property Plant And Equipment [Line Items]
Depreciation	7,688	6,638	6,832
Technology and Development
Property Plant And Equipment [Line Items]
Depreciation	1,599	1,608	1,537
General and Administrative
Property Plant And Equipment [Line Items]
Depreciation	$ 625	$ 631	$ 554

Property, Equipment and Software, Net - Schedule of Interest Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Abstract]
Amount charged to expense	$ 865	$ 1,055	$ 4,105
Amount capitalized within property, equipment and software, net	20	31	44
Total interest cost	$ 885	$ 1,087	$ 4,149

Goodwill and Intangible Assets, Net - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Goodwill impairment	$ 0	$ 0	$ 0
Impairment of intangible assets	0	0	0
Impairment of other long lived assets	0	0	$ 0
Adelphic
Finite Lived Intangible Assets [Line Items]
Goodwill	$ 12,400,000	$ 12,400,000

Goodwill and Intangible Assets, Net - Summary of Balances of Intangibles Assets and Accumulated Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Gross Amount	$ 8,627	$ 8,627
Accumulated Amortization	(6,841)	(5,612)
Intangible assets, net	$ 1,786	$ 3,015
Developed Technology
Finite Lived Intangible Assets [Line Items]
Remaining Weighted Average Useful Life	1 year 1 month 6 days	2 years 1 month 6 days
Gross Amount	$ 4,927	$ 4,927
Accumulated Amortization	(4,169)	(3,469)
Intangible assets, net	$ 758	$ 1,458
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Remaining Weighted Average Useful Life	2 years 1 month 6 days	3 years 1 month 6 days
Gross Amount	$ 2,300	$ 2,300
Accumulated Amortization	(1,615)	(1,287)
Intangible assets, net	$ 685	$ 1,013
Trademarks/Tradenames
Finite Lived Intangible Assets [Line Items]
Remaining Weighted Average Useful Life	4 years 3 months 18 days	4 years 2 months 12 days
Gross Amount	$ 1,400	$ 1,400
Accumulated Amortization	(1,057)	(856)
Intangible assets, net	$ 343	$ 544

Goodwill and Intangible Assets, Net - Summary of Amortization Recorded in Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Amortization	$ 1,229	$ 1,229	$ 1,232
Platform Operations
Finite Lived Intangible Assets [Line Items]
Amortization	700	700	703
General and Administrative
Finite Lived Intangible Assets [Line Items]
Amortization	$ 529	$ 529	$ 529

Goodwill and Intangible Assets, Net - Summary of Estimated Future Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
2022	$ 1,119
2023	467
2024	107
2025	80
2026	13
Total	$ 1,786	$ 3,015

Accrued Liabilities - Summary of Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Payables And Accruals [Abstract]
Accrued traffic acquisition costs	$ 30,942	$ 22,667
Other accrued liabilities	3,144	2,010
Total accrued liabilities	$ 34,086	$ 24,677

Long-Term Debt and Revolving Credit Facility - Schedule of Debt and Revolving Credit Facilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt	$ 17,500	$ 23,535
Less: Current portion of long-term debt		(3,353)
Total long-term debt	17,500	20,182
Revolving Credit Facility
Debt Instrument [Line Items]
Total debt	$ 17,500	17,500
Paycheck Protection Program Loan
Debt Instrument [Line Items]
Total debt		$ 6,035

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References + Details

Long-Term Debt and Revolving Credit Facility - Additional Information (Details) - USD ($)					12 Months Ended
	Oct. 15, 2021	Apr. 14, 2020	Oct. 31, 2019	Mar. 02, 2016	Dec. 31, 2021
Line Of Credit Facility [Line Items]
Additional paid-in capital					$ 82,888,000
Line of credit facility, covenant terms					The Loan Agreement also requires that we maintain compliance with a minimum Fixed Charge Coverage Ratio (as defined in the Loan Agreement) of 1.40 to 1.00 at any time undrawn availability under the Loan Agreement is less than 25%.
Paycheck Protection Program Loan
Line Of Credit Facility [Line Items]
Proceeds from Issuance of Long-term Debt		$ 6,000,000.0
Bears interest at an annual rate		1.00%
Debt instrument, maturity date		Apr. 11, 2022
Paycheck Protection Program Loan \| Principal Forgiveness
Line Of Credit Facility [Line Items]
Debt instrument forgiveness					$ 6,000,000.0
Paycheck Protection Program Loan \| Accrued Interest Forgiveness
Line Of Credit Facility [Line Items]
Debt instrument forgiveness					100,000
Secured Loan Agreement \| 2019 Former Holdco Transaction
Line Of Credit Facility [Line Items]
Stakeholder percentage				60.00%
Accrued interest percentage				7.00%
Principal, interest			$ 25,000,000.0
Professional service fees			$ 3,500,000		3,500,000
Cash generated from execution line of credit facility					17,500,000
Proceeds from issuance of convertible preferred stock					$ 7,500,000
Percentage outstanding convertible preferred units					100.00%
Outstanding principal and accrued interest					$ 72,600,000
Line of credit facility, forgiveness					45,000,000.0
Additional paid-in capital					$ 47,600,000
Loan Agreement \| Revolving Credit Facility \| PNC Bank
Line Of Credit Facility [Line Items]
Senior secured revolving credit facility initiation date					Oct. 31, 2019
Senior secured revolving credit facility, maximum borrowing capacity					$ 40,000,000.0
Senior secured revolving credit facility maturity date					Oct. 31, 2024
Weighted average interest rate					3.24%
Facility fee for undrawn amounts					0.375%
Loan Agreement \| Revolving Credit Facility \| PNC Bank \| Domestic Rate Loans
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate plus margin					0.50%
Loan Agreement \| Revolving Credit Facility \| PNC Bank \| Domestic Rate Loans \| Minimum
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate plus margin	0.75%				0.75%
Loan Agreement \| Revolving Credit Facility \| PNC Bank \| Domestic Rate Loans \| Maximum
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate plus margin	1.25%
Loan Agreement \| Revolving Credit Facility \| PNC Bank \| LIBOR Rate Loans
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate plus margin					1.00%
Loan Agreement \| Revolving Credit Facility \| PNC Bank \| LIBOR Rate Loans \| Minimum
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate plus margin	1.75%
Loan Agreement \| Revolving Credit Facility \| PNC Bank \| LIBOR Rate Loans \| Maximum
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate plus margin	2.25%				1.75%

Convertible Preferred Units and Common Units - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Convertible Preferred Units And Common Units [Line Items]
Historical volatility time period	3 years 3 months
Common units, units authorized		400,000	400,000
Common units, units issued	0	400,000	400,000
Common units, units outstanding	0	400,000	400,000
Dividend distributions declared	$ 5.0
Preferred Unitholders
Convertible Preferred Units And Common Units [Line Items]
Dividend distributions payment	3.0
Common Unitholders
Convertible Preferred Units And Common Units [Line Items]
Dividend distributions payment	$ 2.0
U.S. Treasury Notes
Convertible Preferred Units And Common Units [Line Items]
Debt securities yield period	3 years
Market Approach
Convertible Preferred Units And Common Units [Line Items]
Fair value of common units percentage	50.00%
Income Approach
Convertible Preferred Units And Common Units [Line Items]
Fair value of common units percentage	50.00%
2016 Convertible Preferred Units \| Former Holdco’s
Convertible Preferred Units And Common Units [Line Items]
Liquidation preference per share	$ 190.65
Preferred units convertible to common units	1
2019 Former Holdco Transaction
Convertible Preferred Units And Common Units [Line Items]
Implied discount amount	$ 27.6
Effective conversion price per unit	$ 12.50
Fair value of common units into preferred units are convertible at issuance per unit	$ 58.43
2019 Former Holdco Transaction \| Four Brothers 2 LLC
Convertible Preferred Units And Common Units [Line Items]
Preferred units convertible to common units	1
Liquidation preference calculated percentage	0.028%
Liquidation preference calculated description	10% divided by 360
Temporary equity stated value per preferred unit plus accrued return	$ 12.50
Unit Repurchase Agreement \| 2016 Convertible Preferred Units
Convertible Preferred Units And Common Units [Line Items]
Number of ownership interest units retired	600,000
Unit Repurchase Agreement \| 2019 Convertible Preferred Units
Convertible Preferred Units And Common Units [Line Items]
Convertible preferred units, units issued	600,000

Convertible Preferred Units and Common Units - Summary of Valuation Assumptions Used in Fair Value Calculation of Common Units (Details)	12 Months Ended
	Dec. 31, 2021
Minimum
Convertible Preferred Units And Common Units [Line Items]
Expected term	2 years
Risk-free Interest Rate
Convertible Preferred Units And Common Units [Line Items]
Measurement input	0.0228
Volatility
Convertible Preferred Units And Common Units [Line Items]
Measurement input	0.70
Discount for Lack of Marketability
Convertible Preferred Units And Common Units [Line Items]
Measurement input	0.29

Stock/Unit-Based Compensation - Summary of Stock/Unit-based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2019
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock/Unit-Based Compensation expense	$ 68,822	$ 1,090
Platform Operations
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock/Unit-Based Compensation expense	13,096	42
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock/Unit-Based Compensation expense	25,639	44
Technology and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock/Unit-Based Compensation expense	12,373	82
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock/Unit-Based Compensation expense	$ 17,714	$ 922

Stock/Unit-Based Compensation - Additional Information (Details)				12 Months Ended
	Feb. 12, 2021 shares	Jan. 01, 2020 USD ($) shares	Oct. 31, 2019 USD ($)	Dec. 31, 2021 USD ($) Director $ / shares shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period				4 years
Compensation cost \| $				$ 68,822,000		$ 1,090,000
Discount for lack of marketability				0.00%
Phantom Unit Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		4 years
Equity incentive plan number of units, authorized		12,500,000
Distribution threshold amount \| $		$ 100,000,000
Compensation cost \| $					$ 0
2021 LTIP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares remained available for grant				6,700,000
2021 LTIP \| Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance	11,787,112
Annual increase percentage of shares reserved for issuance	5.00%
2021 LTIP \| Class A Common Stock \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Annual increase percentage of shares reserved for issuance					5.00%
Incentive Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period				4 years
Weighted average grant date fair value of units, granted \| $ / shares				$ 7.80
Weighted average grant date fair value of units, forfeited \| $ / shares				7.80
Weighted average grant date fair value of units, vested \| $ / shares				7.80
Weighted average grant date fair value of units \| $ / shares				$ 7.80
Number of executive directors \| Director				2
Number of Forfeited Units reallocated to executive directors				4,000
Accelerated unit-based compensation \| $			$ 600,000
Incentive units were vested and outstanding					400,000	400,000
Percentage of weight to valuation approach of incentive unit awards				50.00%
Number of stock options vested						160,000
Discount for lack of marketability				55.00%
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based payment award equity instruments other than options grants in period				6,488,000
Total fair value of RSUs, as of their respective vesting dates \| $				$ 45,200,000
Unrecognized stock-based compensation expected to be recognized \| $				$ 63,500,000
Unrecognized stock-based compensation expected to be recognized over a weighted-average period				2 years 2 months 12 days
Unrecognized stock-based compensation expected to be recognized \| $				$ 63,500,000
Restricted Stock Units \| 2021 LTIP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based payment award equity instruments other than options grants in period	6,200,000
Nonqualified Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average grant date fair value of units, granted \| $ / shares				$ 16.52
Weighted average grant date fair value of units, forfeited \| $ / shares				25.86
Weighted average grant date fair value of units \| $ / shares				$ 15.88
Unrecognized stock-based compensation expected to be recognized \| $				$ 1,800,000
Unrecognized stock-based compensation expected to be recognized over a weighted-average period				3 years 7 months 6 days
Number of stock options vested				0
Number of stock options exercisable				0
Weighted-average grant-date fair value of stock options granted \| $ / shares				$ 8.79
Unrecognized stock-based compensation expected to be recognized \| $				$ 1,800,000
Discount for lack of marketability				0.00%

Stock/Unit-Based Compensation - Summary of Incentive Activity (Details) - Incentive Units	12 Months Ended
	Dec. 31, 2019 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Incentive units outstanding, beginning of period	160,000
Granted	4,000
Forfeited	(4,000)
Vested	(160,000)

Stock/Unit-Based Compensation - Summary of Valuation Assumptions used in Fair Value Calculation of Incentive Units (Details)	12 Months Ended
	Dec. 31, 2021
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Discount for lack of marketability	0.00%
Incentive Units
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Risk-free interest rate	0.90%
Volatility	55.40%
Expected Term	2 years 6 months
Discount for lack of marketability	55.00%

Stock/Unit-Based Compensation - Summary of RSU Activity (Details) - Restricted Stock Units $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Granted \| shares	6,488
Number of Shares, Vested \| shares	(2,792)
Number of Shares, Canceled/forfeited \| shares	(663)
RSUs outstanding, ending balance \| shares	3,033
Weighted-Average Grant-Date Fair Value of RSUs, Granted \| $ / shares	$ 24.62
Weighted-Average Grant-Date Fair Value of RSUs, Vested \| $ / shares	24.88
Weighted-Average Grant-Date Fair Value of RSUs, Canceled/forfeited \| $ / shares	25.02
Weighted-Average Grant-Date Fair Value of RSUs outstanding, ending balance \| $ / shares	$ 24.29
Weighted-Average Remaining Contractual Term of RSUs outstanding	1 year 2 months 19 days
Aggregate Intrinsic Value of RSUs outstanding \| $	$ 29,433

Stock/Unit-Based Compensation - Summary of Nonqualified Stock Option Activity (Details) - Nonqualified Stock Options $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted \| shares	235
Forfeited \| shares	(15)
Number of Options outstanding, ending balance \| shares	220
Weighted average grant date fair value of units, granted \| $ / shares	$ 16.52
Weighted average grant date fair value of units, forfeited \| $ / shares	25.86
Weighted-Average Exercise Price of Options outstanding, ending balance \| $ / shares	$ 15.88
Weighted-Average Remaining Contractual Term of Options outstanding	9 years 8 months 12 days
Aggregate Intrinsic Value of Options outstanding \| $	$ 20

Stock/Unit-Based Compensation - Summary of Assumptions used in Black-Scholes Model to Determine Fair Value of Nonqualified Stock Options Granted (Details)	12 Months Ended
	Dec. 31, 2021
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Discount for lack of marketability	0.00%
Nonqualified Stock Options
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Risk-free interest rate	1.20%
Volatility	61.10%
Expected Term	5 years 10 months 24 days
Discount for lack of marketability	0.00%

Income Taxes and Tax Receivable Agreement - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Line Items]
U.S. statutory federal income tax rate	21.00%
Percentage of exclusive of non-controlling interest due to income tax expense/(benefit) not recognize on share of pre-tax book income (loss)	77.50%
Effective tax rate	0.00%
Income tax expense recognized		$ 0	$ 0
Deferred tax assets		0
Deferred tax liabilities		$ 0
Deferred tax assets, valuation allowance	$ 9,338,000
Federal
Income Tax Disclosure [Line Items]
Operating loss carryforwards	5,500,000
State
Income Tax Disclosure [Line Items]
Operating loss carryforwards	$ 8,100,000
Net Operating Loss Begin to Expire	2031
Viant Technology LLC
Income Tax Disclosure [Line Items]
Percentage of economic interest held	22.50%	22.50%

Income Taxes and Tax Receivable Agreement - Schedule of Provision for Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Deferred:
Income tax expense recognized	$ 0	$ 0

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Income Taxes and Tax Receivable Agreement - Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
U.S. statutory federal income tax rate	21.00%
Income passed through to noncontrolling interests	(16.70%)
State and local taxes, net of federal benefit	0.60%
Permanent items	0.70%
Stock-based compensation	(3.20%)
Valuation allowance	(2.40%)
Total effective rate	0.00%

Income Taxes and Tax Receivable Agreement - Significant Portion of Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets
Net operating loss carryforwards	$ 1,321,000
Investment in Partnership	7,909,000
Other, net	108,000
Subtotal	9,338,000
Valuation allowance	$ (9,338,000)
Deferred tax liabilities
Net deferred tax (liabilities) assets		$ 0

Earnings (Loss) Per Share/Unit - Calculation of Basic and Diluted Net Earnings (Loss) Per Share/Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator
Net income (loss)	$ (37,609)	$ 20,638	$ 9,924
Deemed contribution of 2016 convertible preferred unit interest			45,000
Deemed dividend upon issuance of 2019 convertible preferred units			(27,558)
Adjusted net income (loss) attributable to all unitholders	(37,609)	20,638	27,366
Less: Dividend paid to preferred unitholders		(3,000)
Adjusted net income (loss) attributable to common unitholders	(37,609)	17,638	27,366
Less: Dividend paid to common unitholders		(2,000)
Undistributed earnings (loss) attributable to all unitholders	(37,609)	15,638	27,366
Less: Undistributed earnings attributable to participating securities		(9,383)	(18,787)
Less: Net loss attributable to noncontrolling interests	(29,867)
Net income (loss) attributable to Viant Technology Inc./common unitholders	$ (7,742)	$ 6,255	$ 8,579
Weighted-average Class A common stock/units outstanding:
Weighted-average shares of Class A common stock/units outstanding—basic	12,364	400	274
Effect of dilutive securities:
Convertible preferred units		600	600
Incentive common units			126
Weighted-average shares of Class A common stock/units outstanding—diluted	12,364	1,000	1,000
Earnings (loss) per Class A common stock/unit—basic
Distributed earnings per unit—basic		$ 5.00
Undistributed earnings (loss) per unit—basic	$ (0.63)	15.64	$ 31.31
Total earnings (loss) per Class A common stock/unit—basic	(0.63)	20.64	31.31
Earnings (loss) per Class A common stock/unit—diluted
Total earnings (loss) per Class A common stock/unit—diluted	$ (0.63)	$ 20.64	$ 27.37
Anti-dilutive shares/units excluded from earnings (loss) per share of Class A common stock/unit—diluted:
Total shares excluded from earnings (loss) per share of Class A common stock/unit—diluted	50,360
Class A Common Stock
Weighted-average Class A common stock/units outstanding:
Weighted-average shares of Class A common stock/units outstanding—basic	12,364	400	274
Effect of dilutive securities:
Weighted-average shares of Class A common stock/units outstanding—diluted	12,364	1,000	1,000
Earnings (loss) per Class A common stock/unit—basic
Total earnings (loss) per Class A common stock/unit—basic	$ (0.63)	$ 20.64	$ 31.31
Earnings (loss) per Class A common stock/unit—diluted
Total earnings (loss) per Class A common stock/unit—diluted	$ (0.63)	$ 20.64	$ 27.37
Class B Common Stock
Anti-dilutive shares/units excluded from earnings (loss) per share of Class A common stock/unit—diluted:
Total shares excluded from earnings (loss) per share of Class A common stock/unit—diluted	47,107
Restricted Stock Units
Anti-dilutive shares/units excluded from earnings (loss) per share of Class A common stock/unit—diluted:
Total shares excluded from earnings (loss) per share of Class A common stock/unit—diluted	3,033
Nonqualified Stock Options
Anti-dilutive shares/units excluded from earnings (loss) per share of Class A common stock/unit—diluted:
Total shares excluded from earnings (loss) per share of Class A common stock/unit—diluted	220

Noncontrolling Interests - Additional Information (Details) - shares		12 Months Ended
	Feb. 12, 2021	Dec. 31, 2021
Minority Interest [Line Items]
Common stock, conversion basis		continuing members of Viant Technology LLC to exchange Class B units for shares of Class A common stock on a one-for-one basis
Class A Common Stock
Minority Interest [Line Items]
Exchange units for shares of common stock		1
Exchange (cancellation) of shares		300,000
Class B Units \| Viant Technology LLC
Minority Interest [Line Items]
Exchange of noncontrolling interests, shares		300,000
Class B Common Stock
Minority Interest [Line Items]
Exchange (cancellation) of shares		(300,000)
Class B Common Stock \| Viant Technology LLC
Minority Interest [Line Items]
Exchange (cancellation) of shares	48,935,559

Noncontrolling Interests - Summary Ownership of Viant Technology LLC (Details) - Viant Technology LLC - shares		12 Months Ended
	Feb. 12, 2021	Dec. 31, 2021
Minority Interest [Line Items]
Units Owned	58,935,559	60,811,768
Ownership percentage by Viant Technology Inc.	19.50%	22.50%
Ownership Percentage	100.00%	100.00%
Non-controlling Interest
Minority Interest [Line Items]
Units Owned	47,435,559	47,107,130
Ownership percentage by non-controlling interests	80.50%	77.50%

Noncontrolling Interests - Summary of Effect of Changes in Ownership Interest in Viant Technology LLC on Equity (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Noncontrolling Interest [Abstract]
Net loss attributable to Viant Technology Inc.	$ (7,742)
Transfers to noncontrolling interests:
Decrease in the additional-paid-in-capital of Viant Technology Inc. as a result of ownership changes in Viant Technology LLC	(44,361)
Net decrease in equity of Viant Technology Inc. due to equity interest transactions with noncontrolling interests	$ (52,103)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Commitments and Contingencies - Future Minimum Payments Under Non-cancelable Operating Leases (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Commitments And Contingencies Disclosure [Abstract]
2022	$ 3,039
2023	3,953
2024	3,060
2025	2,991
2026 and thereafter	16,713
Total minimum payments	$ 29,756

Guarantees and Indemnities - Additional Information (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Guarantees And Indemnities [Abstract]
Contractual obligation amount	$ 0	$ 0

Related Parties - Additional Information (Details) - Meredith Corporation - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Expenses incurred	$ 300,000
Unpaid expenses	300,000
Revenue	0	$ 0	$ 3,700,000
Purchases	0	0	$ 300,000
Due from (to) related party	$ 0	$ 0

- Definition

Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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+ Details