0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED UNITS AND EQUITY (DEFICIT) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952156 - Disclosure - Nature of Operations link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Revenue link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Property, Equipment and Software, Net link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Goodwill and Intangible Assets, Net link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Accrued Liabilities link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Revolving Credit Facility and PPP Loan link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Stock-based Compensation link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Income Taxes and Tax Receivable Agreement link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Loss Per Share link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Noncontrolling Interests link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Related Parties link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Property, Equipment and Software, Net (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Goodwill and Intangible Assets, Net (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Accrued Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Stock-based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Income Taxes and Tax Receivable Agreement (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Loss Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Noncontrolling Interests (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Traffic Acquisition Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Summary of Changes in Allowance for Doubtful Accounts (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives of Property, Equipment and Software (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Concentrations of Credit Risk (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Revenue - Summary of Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Revenue - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Property, Equipment and Software, Net - Schedule of Major Classes of Property, Equipment and Software (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Property, Equipment and Software, Net - Schedule of Depreciation (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Leases - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Leases - Components of Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Leases - Summary of Future Minimum Lease Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Leases - Summary of Future Minimum Lease Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Goodwill and Intangible Assets, Net - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Goodwill and Intangible Assets, Net - Summary of Balances of Intangibles Assets and Accumulated Amortization (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Goodwill and Intangible Assets, Net - Summary of Amortization Recorded in Consolidated Statements of Operations (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Goodwill and Intangible Assets, Net - Summary of Estimated Future Amortization of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Accrued Liabilities - Summary of Accrued Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Revolving Credit Facility and PPP Loan - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Stock-based Compensation - Summary of Stock/Unit-based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Stock-based Compensation - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Stock-based Compensation - Summary of RSU Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Stock-based Compensation - Summary of Valuation Assumptions used in Fair Value Calculation of Incentive Units (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Stock-based Compensation - Summary of Nonqualified Stock Option Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Stock-Based Compensation - Summary of Stock Repurchase Program (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Income Taxes and Tax Receivable Agreement - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Income Taxes and Tax Receivable Agreement - Income (Loss) Before Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Income Taxes and Tax Receivable Agreement - Schedule of Provision for Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Income Taxes and Tax Receivable Agreement - Schedule of Effective Income Tax Rate Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Income Taxes and Tax Receivable Agreement - Valuation Allowance (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Income Taxes and Tax Receivable Agreement - Significant Portion of Deferred Tax Assets and Deferred Tax Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Income Taxes and Tax Receivable Agreement - Significant Portion of Deferred Tax Assets and Deferred Tax Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Income Taxes and Tax Receivable Agreement - Schedule of Unrecognized Tax Benefits Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Income Taxes and Tax Receivable Agreement - Income Taxes Paid (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Loss Per Share - Calculation of Basic and Diluted Net Loss Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Noncontrolling Interests - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Noncontrolling Interests - Summary Ownership of Viant Technology LLC (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Noncontrolling Interests - Summary of Effect of Changes in Ownership Interest in Viant Technology LLC on Equity (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Commitment and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Related Parties - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink