Viant Technology (DSP) 10-Q 9 Nov 22 2022 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Nov. 07, 2022
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--12-31
Entity Registrant Name	Viant Technology Inc.
Entity Central Index Key	0001828791
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	85-3447553
Entity File Number	001-40015
Entity Address, Address Line One	2722 Michelson Drive
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Irvine
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92612
Local Phone Number	861-8888
City Area Code	949
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	true
Entity Small Business	true
Entity Ex Transition Period	false
Entity Shell Company	false
Title of 12(b) Security	Class A common stock, par value $0.001 per share
Trading Symbol	DSP
Name of each exchange on which registered	NASDAQ
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		14,460,084
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		47,082,260

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenue	$ 48,830	$ 50,857	$ 142,659	$ 141,412
Operating expenses:
Platform operations	27,530	28,967	84,674	85,026
Sales and marketing	16,949	15,131	47,991	49,869
Technology and development	5,576	6,590	15,590	20,521
General and administrative	11,650	11,981	34,458	36,477
Total operating expenses	61,705	62,669	182,713	191,893
Loss from operations	(12,875)	(11,812)	(40,054)	(50,481)
Interest expense (income), net	(455)	227	(282)	703
Other expense, net	6	121	309	53
Gain on extinguishment of debt				(6,110)
Total other expense (income), net	(449)	348	27	(5,354)
Net loss	(12,426)	(12,160)	(40,081)	(45,127)
Less: Net loss attributable to noncontrolling interests	(9,300)	(9,623)	(30,362)	(35,829)
Net loss attributable to Viant Technology Inc.	$ (3,126)	$ (2,537)	$ (9,719)	$ (9,298)
Loss per share of Class A common stock:
Basic	$ (0.22)	$ (0.20)	$ (0.69)	$ (0.78)
Diluted	$ (0.22)	$ (0.20)	$ (0.69)	$ (0.78)
Weighted-average shares of Class A common stock outstanding:
Basic	14,306	12,489	14,078	11,894
Diluted	14,306	12,489	14,078	11,894

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 199,665	$ 238,480
Accounts receivable, net of allowances	93,609	110,739
Prepaid expenses and other current assets	6,010	2,967
Total current assets	299,284	352,186
Property, equipment, and software, net	22,681	22,331
Operating lease assets	22,816
Intangible assets, net	945	1,786
Goodwill	12,422	12,422
Other assets	348	406
Total assets	358,496	389,131
Current liabilities:
Accounts payable	29,897	32,877
Accrued liabilities	28,202	34,086
Accrued compensation	8,235	12,247
Current portion of deferred revenue	65	1,317
Current portion of operating lease liabilities	2,813
Other current liabilities	1,423	2,531
Total current liabilities	70,635	83,058
Long-term debt		17,500
Long-term portion of deferred revenue		5,234
Long-term portion of operating lease liabilities	21,967
Other long-term liabilities		765
Total liabilities	92,602	106,557
Commitments and contingencies (Note 13)
Stockholders’ equity
Preferred stock, $0.001 par value, Authorized shares - 10,000.000, Issued and Outstanding - none
Additional paid-in capital	92,736	82,888
Accumulated deficit	(33,367)	(20,139)
Treasury stock, at cost; 144,173 and 216,230 shares held	(701)	(2,648)
Total stockholders’ equity attributable to Viant Technology Inc.	58,729	60,162
Noncontrolling interests	207,165	222,412
Total equity	265,894	282,574
Total liabilities and stockholders’ equity	358,496	389,131
Class A Common Stock
Stockholders’ equity
Common stock	14	14
Class B Common Stock
Stockholders’ equity
Common stock	$ 47	$ 47

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - $ / shares	Sep. 30, 2022	Dec. 31, 2021
Preferred stock, par value per share	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury stock, shares	144,173	216,230
Class A Common Stock
Common stock, par value per share	$ 0.001	$ 0.001
Common stock, shares authorized	450,000,000	450,000,000
Common stock, shares issued	14,604,257	13,920,868
Common stock, shares outstanding	14,460,084	13,704,638
Class B Common Stock
Common stock, par value per share	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	47,082,260	47,107,130
Common stock, shares outstanding	47,082,260	47,107,130

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED UNITS AND EQUITY - 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, 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)
Effect of Reorganization Transactions, Shares			(400)		48,936
Temporary Equity, Effect of Reorganization Transactions		$ (7,500)
Temporary Equity, Effect of Reorganization Transactions, Shares		(600)
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)
Allocation of equity to noncontrolling interests						(208,587)				$ 208,587
Accrued member tax distributions	75					75
Stock-based compensation	19,756					19,756
Net loss subsequent to Reorganization Transactions	(15,539)						$ (3,104)			(12,435)
Balance at Mar. 31, 2021	260,763			$ 12	$ 47	67,656	(3,104)			196,152
Balance, Shares at Mar. 31, 2021				11,500	47,436
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 loss	(45,127)
Balance at Sep. 30, 2021	268,828			$ 14	$ 47	79,250	(15,760)		$ (7,239)	212,516
Balance, Shares at Sep. 30, 2021				13,891	47,137				(408)
Balance at Mar. 31, 2021	260,763			$ 12	$ 47	67,656	(3,104)			196,152
Balance, Shares at Mar. 31, 2021				11,500	47,436
Accrued member tax distributions	(192)					(192)
Stock-based compensation	34,576					34,576
Net loss	(18,095)						(3,655)			(14,440)
Balance at Jun. 30, 2021	277,052			$ 12	$ 47	102,040	(6,759)			181,712
Balance, Shares at Jun. 30, 2021				11,500	47,436
Exchange of Class B common stock for Class A common stock, Shares				299	(299)
Issuance of Class A 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 stock in connection with the taxes paid related to net share settlement of equity awards	(13,703)								$ (13,703)
Repurchase of treasury stock in connection with the taxes paid related to net share settlement of equity awards, Shares									(773)
Reissuance of treasury stock in connection with equity-based compensation plans							(6,464)		$ 6,464
Reissuance of treasury stock in connection with equity-based compensation plans, Shares									365
Allocation of equity to noncontrolling interests						(40,427)				40,427
Accrued member tax distributions	(337)					(337)
Stock-based compensation	17,976					17,976
Net loss	(12,160)						(2,537)			(9,623)
Balance at Sep. 30, 2021	268,828			$ 14	$ 47	79,250	(15,760)		$ (7,239)	212,516
Balance, Shares at Sep. 30, 2021				13,891	47,137				(408)
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)
Exchange of Class B common stock for Class A common stock, Shares				25	(25)
Issuance of common stock in connection with equity-based compensation plans, Shares				126
Reissuance of treasury stock in connection with equity-based compensation plans							(2,648)		$ 2,648
Reissuance of treasury stock in connection with equity-based compensation plans, Shares									216
Allocation of equity to noncontrolling interests						(4,276)				4,276
Accrued member tax distributions	(12)					(12)
Stock-based compensation	7,326					7,326
Net loss	(13,563)						(3,192)			(10,371)
Balance at Mar. 31, 2022	276,325			$ 14	$ 47	85,926	(25,979)			216,317
Balance, Shares at Mar. 31, 2022				14,072	47,082
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)
Net loss	(40,081)
Balance at Sep. 30, 2022	265,894			$ 14	$ 47	92,736	(33,367)		$ (701)	207,165
Balance, Shares at Sep. 30, 2022				14,604	47,082				(144)
Balance at Mar. 31, 2022	276,325			$ 14	$ 47	85,926	(25,979)			216,317
Balance, Shares at Mar. 31, 2022				14,072	47,082
Issuance of common stock in connection with equity-based compensation plans, Shares				322
Repurchase of treasury stock in connection with the taxes paid related to net share settlement of equity awards	(861)								$ (861)
Repurchase of treasury stock in connection with the taxes paid related to net share settlement of equity awards, Shares									(140)
Allocation of equity to noncontrolling interests						(5,455)				5,455
Accrued member tax distributions	(16)					(16)
Stock-based compensation	8,821					8,821
Net loss	(14,092)						(3,401)			(10,691)
Balance at Jun. 30, 2022	270,177			$ 14	$ 47	89,276	(29,380)		$ (861)	211,081
Balance, Shares at Jun. 30, 2022				14,394	47,082				(140)
Issuance of common stock in connection with equity-based compensation plans, Shares				210
Repurchase of treasury stock in connection with the taxes paid related to net share settlement of equity awards	(701)								$ (701)
Repurchase of treasury stock in connection with the taxes paid related to net share settlement of equity awards, Shares									(144)
Reissuance of treasury stock in connection with equity-based compensation plans							(861)		$ 861
Reissuance of treasury stock in connection with equity-based compensation plans, Shares									140
Allocation of equity to noncontrolling interests						(5,384)				5,384
Accrued member tax distributions	18					18
Stock-based compensation	8,826					8,826
Net loss	(12,426)						(3,126)			(9,300)
Balance at Sep. 30, 2022	$ 265,894			$ 14	$ 47	$ 92,736	$ (33,367)		$ (701)	$ 207,165
Balance, Shares at Sep. 30, 2022				14,604	47,082				(144)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net loss	$ (40,081)	$ (45,127)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	9,746	8,024
Stock-based compensation	21,855	62,192
Provision for (recovery of) doubtful accounts	834	(161)
Loss on disposal of assets	419	148
Gain on extinguishment of debt		(6,110)
Amortization of operating lease assets	1,961
Changes in operating assets and liabilities:
Accounts receivable	16,295	20,316
Prepaid expenses and other assets	(2,982)	(1,960)
Accounts payable	(2,955)	(4,816)
Accrued liabilities	(5,885)	(1,118)
Accrued compensation	(4,171)	198
Deferred revenue	(6,486)	(1,446)
Operating lease liabilities	(964)
Other liabilities	(900)	(55)
Net cash provided by (used in) operating activities	(13,314)	30,085
Cash flows from investing activities:
Purchases of property and equipment	(553)	(386)
Capitalized software development costs	(5,872)	(5,577)
Net cash used in investing activities	(6,425)	(5,963)
Cash flows from financing activities:
Proceeds from issuance of common stock, net of underwriting discounts		232,500
Taxes paid related to net share settlement of equity awards	(1,561)	(13,703)
Payment of member tax distributions	(15)	(7,330)
Payment of offering costs		(2,608)
Repayment of revolving credit facility	(17,500)
Net cash provided by (used in) financing activities	(19,076)	208,859
Net increase (decrease) in cash and cash equivalents	(38,815)	232,981
Cash and cash equivalents at beginning of period	238,480	9,629
Cash and cash equivalents at end of period	199,665	242,610
Supplemental disclosure of cash flow information:
Cash paid for interest	199	546
Supplemental disclosure of non-cash investing and financing activities:
Stock-based compensation included in capitalized software development costs	3,113	10,116
Operating lease assets obtained in exchange for operating lease liabilities	3,778
Capitalized assets financed by accounts payable and accrued liabilities	$ 516
Accrued member tax distributions		5
Non-cash gain on extinguishment of debt related to Paycheck Protection Program loan		$ 6,110

Nature of Operations

Nature of Operations	9 Months Ended
	Sep. 30, 2022
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 . On February 9, 2021, the Securities and Exchange Commission (“SEC”) declared effective the Company’s Form S-1 related to the initial public offering (“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 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 of Viant Technology Inc. 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 in the IPO. 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; • 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; • • Immediately following the closing of the IPO, Viant Technology LLC became the predecessor of the Company for financial reporting purposes. Viant Technology Inc. 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 condensed 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 condensed consolidated financial statements and records a noncontrolling interest related to the Class B units held by the Class B stockholders on its condensed consolidated balance sheets and statements of operations.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2022
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 condensed consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information which are unaudited and include the operations of the Company, Viant Technology LLC and its wholly owned subsidiaries. Viant Technology LLC is considered a variable interest entity. 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 condensed 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 from January 1, 2021 through February 11, 2021 presented in the condensed consolidated financial statements and notes to condensed consolidated financial statements herein represent the historical operations of Viant Technology LLC. The amounts as of September 30, 2022 and December 31, 2021 and the operations since February 12, 2021 reflect the consolidated operations of the Company. Management believes that the accompanying condensed consolidated financial statements reflect the adjustments necessary for the fair statement of its condensed consolidated balance sheets as of September 30, 2022 and December 31, 2021, statements of operations for the three and nine months ended September 30, 2022 and 2021, and cash flows for the nine months ended September 30, 2022 and 2021. The condensed consolidated balance sheet as of December 31, 2021 was derived from the audited annual financial statements but does not contain all of the footnote disclosures from the annual financial statements. Certain information and disclosures normally included in consolidated financial statements prepared in accordance with GAAP have been omitted. Accordingly, these condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and related notes included in its Annual Report on Form 10-K for the year ended December 31, 2021. The condensed consolidated statements of operations for the three and nine months ended September 30, 2022 are not necessarily indicative of the results to be expected for the year ending December 31, 2022 (“fiscal 2022”), or for any other future annual or interim period. Certain reclassifications have been made within the condensed consolidated financial statements for the prior period to conform with current presentation. There have been no material changes to our significant accounting policies as described in our Annual Report on Form 10-K for the year ended December 31, 2021. Use of Estimates The preparation of our condensed 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 condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. On an ongoing basis, management evaluates its estimates, primarily those related to revenue recognition, operating lease assets and liabilities, 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 September 30, 2022, the impact of widespread macroeconomic uncertainties, including the continuing impact of COVID-19, labor shortages, inflation and monetary supply shifts, rising interest rates, tightening of credit markets, recession risks, and potential disruptions from the Russia-Ukraine conflict, on our business continues to evolve. As a result, many of our estimates and assumptions consider macroeconomic 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 on the potential impact on our business of global economic and business events, our estimates may change materially in future periods. Comprehensive Loss For the periods presented, net loss is equal to comprehensive loss. Cash and Cash Equivalents For purposes of balance sheet presentation and reporting of cash flows, the Company considers cash in bank accounts, money market funds, and highly liquid debt instruments with an original maturity of less than 90 days to be cash and cash equivalents. The carrying amounts of the cash and cash equivalents approximate fair value due to their short-term nature. Accounts Receivable, Net of Allowances The following table presents changes in the allowance for doubtful accounts for the three and nine months ended September 30, 2022: (in thousands) Balance as of December 31 $ 54 Provision for doubtful accounts 51 Write-offs, net of recoveries (1 ) Balance as of March 31 $ 104 Provision for doubtful accounts 1 Write-offs, net of recoveries — Balance as of June 30 $ 105 Provision for doubtful accounts 783 Write-offs, net of recoveries — Balance as of September 30 $ 888 Concentration of Risk Financial instruments that potentially subject the Company to concentration of 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’s federally insured limits. Accounts receivable include amounts due from customers with principal operations primarily in the United States. As of September 30, 2022, no individual customer accounted for 10.0% or greater of consolidated accounts receivable. As of December 31, 2021, two individual customers accounted for 13.2% and 12.3% of consolidated accounts receivable. As of September 30, 2022, one individual supplier accounted for 15.3 % of consolidated accounts payable and accrued liabilities. As of December 31, 2021, one individual supplier accounted for 16.8% of consolidated accounts payable and accrued liabilities. The following table provides the Company’s concentrations of risk with respect to advertising agency holding companies as a percentage of the Company’s total revenues. There was no individual customer that accounted for 10.0% or more of the Company’s total revenues in any of the periods reported below. Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Advertising Agency Holding Company A 20.3 % 16.3 % 13.9 % 10.2 % B <10.0 % <10.0 % <10.0 % 11.8 % Operating Leases See Note 5—Leases. JOBS Act Election as an Emerging Growth Company 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 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 condensed 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. Recently Issued Accounting Pronouncements Measurement of Credit Losses on Financial Instruments In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Measurement of Credit Losses on Financial Instruments Codification Improvements In October 2020, the FASB issued ASU No. 2020-10, Codification Improvements 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 its condensed consolidated financial statements. Recently Adopted Accounting Pronouncements Leases In February 2016, the FASB issued ASU No. 2016-02, Leases —Leases for additional information. Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity-Classified Written Call Options In May 2021, the FASB issued ASU No. 2021-04, Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity-Classified Written Call Options

Revenue

Revenue	9 Months Ended
	Sep. 30, 2022
Revenue From Contract With Customer [Abstract]
Revenue	3. Revenue The disaggregation of revenue was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Over-time revenue $ 133 $ 1,136 $ 494 $ 3,344 Point-in-time revenue 48,697 49,721 142,165 138,068 Total revenue $ 48,830 $ 50,857 $ 142,659 $ 141,412 Revenue for unsatisfied performance obligations expected to be recognized in the future for contracts with an original expected duration of greater than one year was de minimis as of September 30, 2022 and $6.6 million as of December 31, 2021. These amounts do not include contracts with an original expected duration of less than one year, which is the majority of the Company’s contracts. The decrease from the prior year end was primarily due to an agreement modification whereby the Company agreed to a $ 6.2 Remaining deferred revenue that is anticipated to be recognized during the succeeding 12-month period is recorded in the current portion of deferred

Property, Equipment and Softwar

Property, Equipment and Software, Net	9 Months Ended
	Sep. 30, 2022
Property Plant And Equipment [Abstract]
Property, Equipment and Software, Net	4. Property, Equipment and Software, Net Major classes As of September 30, As of December 31, 2022 2021 Capitalized software development costs $ 69,782 $ 61,490 Computer equipment 1,056 1,823 Purchased software 32 32 Furniture, fixtures and office equipment 1,201 1,159 Leasehold improvements 2,463 2,178 Total property, equipment and software 74,534 66,682 Less: Accumulated depreciation (51,853 ) (44,351 ) Total property, equipment and software, net $ 22,681 $ 22,331 Depreciation recorded in the condensed consolidated statements of operations was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Platform operations $ 2,510 $ 2,080 $ 7,219 $ 5,424 Sales and marketing — — — — Technology and development 432 421 1,250 1,185 General and administrative 147 164 436 494 Total $ 3,089 $ 2,665 $ 8,905 $ 7,103 For the three months ended September 30, 2022 and 2021, total interest cost incurred was $0.1 million and $0.2 million, respectively. For the nine months ended September 30, 2022 and 2021, total interest cost incurred was $ 0.4

Leases

Leases	9 Months Ended
	Sep. 30, 2022
Leases [Abstract]
Leases	5. Leases At the beginning of fiscal 2022, the Company adopted new lease accounting guidance issued by the FASB. The most significant change requires lessees to record the present value of operating lease payments as We adopted the new guidance using the modified retrospective method at the beginning of fiscal 2022. As such, the condensed consolidated balance • our existing arrangements are or contain leases; • our existing arrangements are operating or finance leases; and • to capitalize initial direct costs. The adoption of the new guidance resulted in the recognition of operating lease assets of approximately $ 21.0 22.0 deferred The impact on the Company’s condensed consolidated statements of operations and cash flows was not material. The present value of the lease payments was calculated using the Company’s incremental borrowing rate applicable to the lease, which is determined Lessee Arrangements The Company nine years The Company entered into one lease during the three and nine months ended September 30, 2022, as described below. We determine whether an arrangement is a lease at the contract inception date. Our leases may require us to make fixed rental payments or variable lease payments, which are based on a variety of factors including property values, tax and utility rates, property services fees, and other factors Some of our leases include renewal options to extend the leases for up to five years and/or termination options to terminate the leases within one year. If it is re considered in calculating the term of the lease. As of September 30, 2022, our operating leases had a weighted-average remaining lease term of approximately eight years and a weighted-average incremental borrowing rate of 3.1 %. As of September 30, 2022, the Company had entered into an operating lease for office space in New York with total estimated future lease payments of $5.0 million that had not yet commenced and therefore is not included in the measurement of the operating right-of-use asset and operating lease liability on the condensed consolidated balance sheet. The lease term is expected to commence in the fourth quarter of fiscal 2022. In conjunction with this lease, PNC Bank, National Association (“PNC Bank”) Cash paid for amounts The components of lease expense were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2022 2022 Operating lease cost $ 915 $ 2,542 Short-term lease cost 341 1,045 Variable lease cost 23 113 Total lease cost $ 1,279 $ 3,700 Future minimum lease payments as of September 30, 2022 were as follows: As of September 30, Year 2022 Remainder of 2022 $ 813 2023 4,506 2024 4,334 2025 4,270 2026 4,257 Thereafter 14,992 Total undiscounted future lease payments 33,172 Less: Commitments for leases not yet commenced (5,016 ) Less: Imputed interest (3,376 ) Present value of operating lease liabilities 24,780 Less: Operating lease liabilities, current (2,813 ) Operating lease liabilities, noncurrent $ 21,967 Disclosures related to periods prior to the adoption of ASC 842 Rent expense Future minimum payments under the Company’s non-cancelable operating leases, primarily related to office space, as of December As of December 31, Year 2021 2022 $ 3,039 2023 3,953 2024 3,060 2025 2,991 2026 2,974 Thereafter 13,739 Total minimum payments $ 29,756

Intangible Assets, Net

Intangible Assets, Net	9 Months Ended
	Sep. 30, 2022
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets, Net	6. Intangible Assets, Net The balances of intangible assets and accumulated amortization are as follows: As of September 30, 2022 Remaining Weighted-Average Useful Life (years) Gross Amount Accumulated Amortization Net Carrying Amount Developed technology 0.3 $ 4,927 $ (4,693 ) $ 234 Customer relationships 1.3 2,300 (1,862 ) 438 Trademarks/tradenames 3.4 1,400 (1,127 ) 273 Total $ 8,627 $ (7,682 ) $ 945 As of December 31, 2021 Remaining Weighted- Average Useful Life (years) Gross Amount Accumulated Amortization Net Carrying Amount 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 Amortization of intangible assets recorded in the condensed consolidated statements of operations was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Platform operations $ 175 $ 175 $ 525 $ 525 Sales and marketing — — — — Technology and development — — — — General and administrative 102 132 316 396 Total $ 277 $ 307 $ 841 $ 921 Estimated future amortization As of September 30, Year 2022 Remainder of 2022 $ 277 2023 468 2024 107 2025 80 2026 13 Thereafter — Total $ 945

Accrued Liabilities

Accrued Liabilities	9 Months Ended
	Sep. 30, 2022
Payables And Accruals [Abstract]
Accrued Liabilities	7. Accrued Liabilities The Company’s accrued liabilities consisted of the following: As of September 30, As of December 31, 2022 2021 Accrued traffic acquisition costs $ 24,790 $ 30,942 Other accrued liabilities 3,412 3,144 Total accrued liabilities $ 28,202 $ 34,086 The Company had a balance of $0.2 million and $0.3 million as of September 30, 2022 and December 31, 2021, respectively, payable to related parties for expenses they incurred on our behalf, which was recorded within accrued liabilities on the condensed consolidated balance sheets. The related expense incurred by the Company was $0.3 million and $0.8 million for the three and nine months ended September 30, 2022, respectively, and $0.2 million for the nine months ended September 30, 2021. The related expense incurred by the Company was de minimis for the three months ended September 30, 2021.

Revolving Credit Facility and P

Revolving Credit Facility and PPP Loan	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Revolving Credit Facility and PPP Loan	8. Revolving Credit Facility and PPP Loan Revolving Credit Facility On October 31, 2019, we entered into an asset-based revolving credit and security agreement (the “Loan Agreement”) with PNC Bank. 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 nine months ended September 30, 2022 was — The Loan On May 6, 2022, the Company fully paid off the outstanding balance of advances under our revolving credit facility, and the carrying value as of September 30, 2022 was zero. The carrying value as of December 31, 2021 was $17.5 million, which was recorded in “Long-term debt” on the condensed consolidated balance sheet and as the interest rate is variable and approximates prevailing market interest rates for similar debt arrangements. 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. PPP Loan On April 14, 2020, the Company received proceeds from a Paycheck Protection Program Loan (the “ Paycheck Protection Program Proceeds from loans granted under the CARES Act were to be used for payroll, costs to continue employee group health care benefits, rent, utilities the Company received notice of forgiveness of the PPP Loan in whole, including all accrued unpaid interest and recorded the forgiveness of approximately $6.0 million of principal and $0.1 million of accrued interest in “Gain on extinguishment of debt” in the condensed consolidated statements of operations.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2022
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	9. Stock-Based Compensation In connection with the IPO, which occurred on February 12, 2021, the Phantom Unit Plan was replaced by the LTIP. On February 12, 2021, 6.2 million restricted stock units (“RSUs”) were granted under the 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 LTIP. As of September 30, 2022, the Company had only granted RSUs and nonqualified stock options under the LTIP. Under the LTIP, 3.9 Stock-based compensation recorded in the condensed consolidated statements of operations was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Platform operations $ 1,233 $ 3,142 $ 3,622 $ 11,843 Sales and marketing 2,324 4,859 6,929 23,586 Technology and development 1,430 3,015 4,024 10,983 General and administrative 2,724 4,399 7,280 15,780 Total $ 7,711 $ 15,415 $ 21,855 $ 62,192 RSUs The following summarizes RSU activity: Number of Shares (in thousands) Weighted-Average Grant Date Fair Value RSUs outstanding as of December 31, 2021 3,033 $ 24.29 Granted 2,284 6.16 Vested (342 ) 25.02 Canceled/forfeited (117 ) 23.92 RSUs outstanding as of March 31, 2022 4,858 15.72 Granted 365 6.07 Vested (322 ) 24.69 Canceled/forfeited (120 ) 13.64 RSUs outstanding as of June 30, 2022 4,781 14.43 Granted 232 4.81 Vested (350 ) 23.22 Canceled/forfeited (242 ) 10.47 RSUs outstanding as of September 30, 2022 4,421 13.45 As of September 30, 2022, the Company had unrecognized stock-based compensation relating to RSUs of approximately $50.9 million, which is expected to be recognized over a weighted-average period of 2.6 years. Nonqualified Stock Options The following summarizes nonqualified stock option activity: Number of Options (in thousands) Weighted-Average Exercise Price Weighted-Average Remaining Contractual Term (years) Aggregate Intrinsic Value (in thousands) Outstanding as of December 31, 2021 220 $ 15.88 9.7 $ 20 Granted 3,565 6.09 Exercised — — Canceled (14 ) 12.02 Expired — — Outstanding as of March 31, 2022 3,771 6.64 9.9 1,891 Granted 216 6.16 Exercised — — Canceled (89 ) 7.88 Expired — — Outstanding as of June 30, 2022 3,898 6.58 9.7 — Granted 246 4.77 Exercised — — Canceled (242 ) 8.58 Expired — — Outstanding as of September 30, 2022 3,902 6.35 9.4 — Vested and exercisable 42 19.23 6.4 — The weighted-average grant date fair value of the nonqualified stock options granted during the three and nine months ended September 30, 2022 was $2.78 and $3.50, respectively. T he Company had unrecognized stock-based compensation relating to unvested nonqualified stock options of approximately $ million, which is expected to be recognized over a weighted-average period of The following table presents the assumptions used in the Black-Scholes model to determine the fair value of nonqualified stock options for the three and nine months ended September 30, 2022 and 2021. Three and Nine Months Ended September 30, Three and Nine Months Ended September 30, 2022 2021 Risk free interest rate 1.4% - 2.0% 1.2% Expected volatility 61.5% - 62.7% 61.1% Expected term (in years) 5.9 - 6.0 5.9 Expected dividend yield 0.0% 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 Class A 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

Income Taxes and Tax Receivable Agreement	9 Months Ended
	Sep. 30, 2022
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 in the current and prior-year periods, as well as a pass-through permanent difference related to the forgiveness of the PPP Loan in the prior-year periods. The Company did not recognize an income tax benefit (expense) on its share of pre-tax book income (loss), exclusive of the noncontrolling interest of 76.5% due to the full valuation allowance against its deferred tax assets, resulting in an effective tax rate of 0.0% for each of the three and nine months ended September 30, 2022 and 2021. As of September 30, 2022, management determined based on applicable accounting standards and the weight of all available evidence, it was not more likely than not (“MLTN”) that the Company will generate sufficient taxable income to realize our deferred tax assets including the difference in our tax basis in excess of the financial reporting value for our investment in Viant Technology LLC. Consequently, we have established a full valuation allowance against our deferred tax assets as of September 30, 2022. In the event that management subsequently determines that it is MLTN that we will realize our deferred tax assets in the future over the recorded amount, a decrease to the valuation allowance will be made, which will reduce the provision for income taxes. The Company has concluded based on applicable accounting standards and the weight of all available evidence, that it was MLTN that its deferred tax assets subject to the Tax Receivable Agreement entered into with Viant Technology LLC, continuing members of Viant Technology LLC and the TRA Representative (as defined in the TRA) on February 9, 2021 (“TRA”) would not be realized as of September 30, 2022. Therefore, the Company has not recorded a liability related to the remaining tax savings it may realize from utilization of such deferred tax assets after concluding it was not probable that such TRA liability would be paid based on its estimates of future taxable income. As of the September 30, 2022, the total unrecorded TRA liability is approximately $10.3 million. If utilization of the deferred tax assets subject to the TRA becomes MLTN in the future, the Company will record a liability related to the TRA, to the extent probable at that time, which will be recognized as an expense within its condensed consolidated statements of operations.

Loss Per Share

Loss Per Share	9 Months Ended
	Sep. 30, 2022
Earnings Per Share [Abstract]
Loss Per Share	1 1. Loss Per Share For the three and nine months ended September 30, 2022 and 2021, basic net loss per share has been calculated by dividing net loss attributable to Class A common stockholders by the weighted-average number of shares of Class A common stock outstanding for the same period. Shares The following Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Numerator Net loss $ (12,426 ) $ (12,160 ) $ (40,081 ) $ (45,127 ) Less: Net loss attributable to noncontrolling interests (9,300 ) (9,623 ) (30,362 ) (35,829 ) Net loss attributable to Viant Technology Inc. $ (3,126 ) $ (2,537 ) $ (9,719 ) $ (9,298 ) Denominator Weighted-average shares of Class A common stock outstanding—basic and diluted 14,306 12,489 14,078 11,894 Loss per share of Class A common stock—basic $ (0.22 ) $ (0.20 ) $ (0.69 ) $ (0.78 ) Loss per share of Class A common stock—diluted $ (0.22 ) $ (0.20 ) $ (0.69 ) $ (0.78 ) Anti-dilutive shares excluded from loss per share of Class A common stock—diluted: Restricted stock units 4,421 3,385 4,421 3,385 Nonqualified stock options 3,902 147 3,902 147 Shares of Class B common stock 47,082 47,137 47,082 47,137 Total shares excluded from loss per share of Class A common stock—diluted 55,405 50,669 55,405 50,669

Noncontrolling Interests

Noncontrolling Interests	9 Months Ended
	Sep. 30, 2022
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. The following table summarizes the ownership of Viant Technology LLC: As of September 30, 2022 As of December 31, 2021 Owner Units Owned Ownership Percentage Units Owned Ownership Percentage Viant Technology Inc. 14,460,084 23.5 % 13,704,638 22.5 % Noncontrolling interests 47,082,260 76.5 % 47,107,130 77.5 % Total 61,542,344 100.0 % 60,811,768 100.0 % During the nine months ended September 30, 2022, noncontrolling interests exchanged 24,870 Class B units of Viant Technology LLC for 24,870 shares of the 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 periods indicated. Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Net loss attributable to Viant Technology Inc. $ (3,126 ) $ (2,537 ) $ (9,719 ) $ (9,298 ) Transfers to noncontrolling interests: Decrease in the additional-paid-in-capital of Viant Technology Inc. resulting from ownership changes in Viant Technology LLC (5,384 ) (40,427 ) (15,115 ) (40,427 ) Change from net loss attributable to Viant Technology Inc. and transfers to noncontrolling interests $ (8,510 ) $ (42,964 ) $ (24,834 ) $ (49,725 )

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2022
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	13. Commitments and Contingencies As of September 30, 2022, the Company had non-cancelable operating lease commitments for office space that have been recorded as operating lease liabilities. Refer to Note 5—Leases for additional information regarding lease commitments. 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 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 condensed consolidated financial statements. Accordingly, no amounts for any obligation have been recorded as of September 30, 2022.

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2022
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation The accompanying condensed consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information which are unaudited and include the operations of the Company, Viant Technology LLC and its wholly owned subsidiaries. Viant Technology LLC is considered a variable interest entity. 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 condensed 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 from January 1, 2021 through February 11, 2021 presented in the condensed consolidated financial statements and notes to condensed consolidated financial statements herein represent the historical operations of Viant Technology LLC. The amounts as of September 30, 2022 and December 31, 2021 and the operations since February 12, 2021 reflect the consolidated operations of the Company. Management believes that the accompanying condensed consolidated financial statements reflect the adjustments necessary for the fair statement of its condensed consolidated balance sheets as of September 30, 2022 and December 31, 2021, statements of operations for the three and nine months ended September 30, 2022 and 2021, and cash flows for the nine months ended September 30, 2022 and 2021. The condensed consolidated balance sheet as of December 31, 2021 was derived from the audited annual financial statements but does not contain all of the footnote disclosures from the annual financial statements. Certain information and disclosures normally included in consolidated financial statements prepared in accordance with GAAP have been omitted. Accordingly, these condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and related notes included in its Annual Report on Form 10-K for the year ended December 31, 2021. The condensed consolidated statements of operations for the three and nine months ended September 30, 2022 are not necessarily indicative of the results to be expected for the year ending December 31, 2022 (“fiscal 2022”), or for any other future annual or interim period. Certain reclassifications have been made within the condensed consolidated financial statements for the prior period to conform with current presentation. There have been no material changes to our significant accounting policies as described in our Annual Report on Form 10-K for the year ended December 31, 2021.
Use of Estimates	Use of Estimates The preparation of our condensed 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 condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. On an ongoing basis, management evaluates its estimates, primarily those related to revenue recognition, operating lease assets and liabilities, 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 September 30, 2022, the impact of widespread macroeconomic uncertainties, including the continuing impact of COVID-19, labor shortages, inflation and monetary supply shifts, rising interest rates, tightening of credit markets, recession risks, and potential disruptions from the Russia-Ukraine conflict, on our business continues to evolve. As a result, many of our estimates and assumptions consider macroeconomic 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 on the potential impact on our business of global economic and business events, our estimates may change materially in future periods.
Comprehensive Loss	Comprehensive Loss For the periods presented, net loss is equal to comprehensive loss.
Cash and Cash Equivalents	Cash and Cash Equivalents For purposes of balance sheet presentation and reporting of cash flows, the Company considers cash in bank accounts, money market funds, and highly liquid debt instruments with an original maturity of less than 90 days to be cash and cash equivalents. The carrying amounts of the cash and cash equivalents approximate fair value due to their short-term nature.
Accounts Receivable, Net of Allowances	Accounts Receivable, Net of Allowances The following table presents changes in the allowance for doubtful accounts for the three and nine months ended September 30, 2022: (in thousands) Balance as of December 31 $ 54 Provision for doubtful accounts 51 Write-offs, net of recoveries (1 ) Balance as of March 31 $ 104 Provision for doubtful accounts 1 Write-offs, net of recoveries — Balance as of June 30 $ 105 Provision for doubtful accounts 783 Write-offs, net of recoveries — Balance as of September 30 $ 888
Concentration of Risk	Concentration of Risk Financial instruments that potentially subject the Company to concentration of 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’s federally insured limits. Accounts receivable include amounts due from customers with principal operations primarily in the United States. As of September 30, 2022, no individual customer accounted for 10.0% or greater of consolidated accounts receivable. As of December 31, 2021, two individual customers accounted for 13.2% and 12.3% of consolidated accounts receivable. As of September 30, 2022, one individual supplier accounted for 15.3 % of consolidated accounts payable and accrued liabilities. As of December 31, 2021, one individual supplier accounted for 16.8% of consolidated accounts payable and accrued liabilities. The following table provides the Company’s concentrations of risk with respect to advertising agency holding companies as a percentage of the Company’s total revenues. There was no individual customer that accounted for 10.0% or more of the Company’s total revenues in any of the periods reported below. Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Advertising Agency Holding Company A 20.3 % 16.3 % 13.9 % 10.2 % B <10.0 % <10.0 % <10.0 % 11.8 %
Operating Leases	Operating Leases See Note 5—Leases.
JOBS Act Election as an Emerging Growth Company	JOBS Act Election as an Emerging Growth Company 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 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 condensed 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.
Recent Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Measurement of Credit Losses on Financial Instruments In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Measurement of Credit Losses on Financial Instruments Codification Improvements In October 2020, the FASB issued ASU No. 2020-10, Codification Improvements 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 its condensed consolidated financial statements.
Recent Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements Leases In February 2016, the FASB issued ASU No. 2016-02, Leases —Leases for additional information. Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity-Classified Written Call Options In May 2021, the FASB issued ASU No. 2021-04, Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity-Classified Written Call Options

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2022
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]
Summary of Changes in Allowance for Doubtful Accounts	The following table presents changes in the allowance for doubtful accounts for the three and nine months ended September 30, 2022: (in thousands) Balance as of December 31 $ 54 Provision for doubtful accounts 51 Write-offs, net of recoveries (1 ) Balance as of March 31 $ 104 Provision for doubtful accounts 1 Write-offs, net of recoveries — Balance as of June 30 $ 105 Provision for doubtful accounts 783 Write-offs, net of recoveries — Balance as of September 30 $ 888
Schedules of Concentrations of Credit Risk	The following table provides the Company’s concentrations of risk with respect to advertising agency holding companies as a percentage of the Company’s total revenues. There was no individual customer that accounted for 10.0% or more of the Company’s total revenues in any of the periods reported below. Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Advertising Agency Holding Company A 20.3 % 16.3 % 13.9 % 10.2 % B <10.0 % <10.0 % <10.0 % 11.8 %

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2022
Revenue From Contract With Customer [Abstract]
Summary of Disaggregation of Revenue	The disaggregation of revenue was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Over-time revenue $ 133 $ 1,136 $ 494 $ 3,344 Point-in-time revenue 48,697 49,721 142,165 138,068 Total revenue $ 48,830 $ 50,857 $ 142,659 $ 141,412

Property, Equipment and Softw_2

Property, Equipment and Software, Net (Tables)	9 Months Ended
	Sep. 30, 2022
Property Plant And Equipment [Abstract]
Schedule of Major Classes of Property, Equipment and Software	Major classes As of September 30, As of December 31, 2022 2021 Capitalized software development costs $ 69,782 $ 61,490 Computer equipment 1,056 1,823 Purchased software 32 32 Furniture, fixtures and office equipment 1,201 1,159 Leasehold improvements 2,463 2,178 Total property, equipment and software 74,534 66,682 Less: Accumulated depreciation (51,853 ) (44,351 ) Total property, equipment and software, net $ 22,681 $ 22,331
Schedule of Depreciation	Depreciation recorded in the condensed consolidated statements of operations was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Platform operations $ 2,510 $ 2,080 $ 7,219 $ 5,424 Sales and marketing — — — — Technology and development 432 421 1,250 1,185 General and administrative 147 164 436 494 Total $ 3,089 $ 2,665 $ 8,905 $ 7,103

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2022
Leases [Abstract]
Components of Lease Expense	The components of lease expense were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2022 2022 Operating lease cost $ 915 $ 2,542 Short-term lease cost 341 1,045 Variable lease cost 23 113 Total lease cost $ 1,279 $ 3,700
Summary of Future Minimum Lease Payments	Future minimum lease payments as of September 30, 2022 were as follows: As of September 30, Year 2022 Remainder of 2022 $ 813 2023 4,506 2024 4,334 2025 4,270 2026 4,257 Thereafter 14,992 Total undiscounted future lease payments 33,172 Less: Commitments for leases not yet commenced (5,016 ) Less: Imputed interest (3,376 ) Present value of operating lease liabilities 24,780 Less: Operating lease liabilities, current (2,813 ) Operating lease liabilities, noncurrent $ 21,967
Summary of Future Minimum Payments Under Non-Cancelable Operating Leases	Future minimum payments under the Company’s non-cancelable operating leases, primarily related to office space, as of December As of December 31, Year 2021 2022 $ 3,039 2023 3,953 2024 3,060 2025 2,991 2026 2,974 Thereafter 13,739 Total minimum payments $ 29,756

Intangible Assets, Net (Tables)

Intangible Assets, Net (Tables)	9 Months Ended
	Sep. 30, 2022
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Balances of Intangible Assets and Accumulated Amortization	The balances of intangible assets and accumulated amortization are as follows: As of September 30, 2022 Remaining Weighted-Average Useful Life (years) Gross Amount Accumulated Amortization Net Carrying Amount Developed technology 0.3 $ 4,927 $ (4,693 ) $ 234 Customer relationships 1.3 2,300 (1,862 ) 438 Trademarks/tradenames 3.4 1,400 (1,127 ) 273 Total $ 8,627 $ (7,682 ) $ 945 As of December 31, 2021 Remaining Weighted- Average Useful Life (years) Gross Amount Accumulated Amortization Net Carrying Amount 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
Summary of Amortization of Intangible Assets Recorded in Consolidated Statements of Operations	Amortization of intangible assets recorded in the condensed consolidated statements of operations was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Platform operations $ 175 $ 175 $ 525 $ 525 Sales and marketing — — — — Technology and development — — — — General and administrative 102 132 316 396 Total $ 277 $ 307 $ 841 $ 921
Summary of Estimated Future Amortization of Intangible Assets	Estimated future amortization As of September 30, Year 2022 Remainder of 2022 $ 277 2023 468 2024 107 2025 80 2026 13 Thereafter — Total $ 945

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	9 Months Ended
	Sep. 30, 2022
Payables And Accruals [Abstract]
Summary of Accrued Liabilities	The Company’s accrued liabilities consisted of the following: As of September 30, As of December 31, 2022 2021 Accrued traffic acquisition costs $ 24,790 $ 30,942 Other accrued liabilities 3,412 3,144 Total accrued liabilities $ 28,202 $ 34,086

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2022
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Stock-based Compensation	Stock-based compensation recorded in the condensed consolidated statements of operations was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Platform operations $ 1,233 $ 3,142 $ 3,622 $ 11,843 Sales and marketing 2,324 4,859 6,929 23,586 Technology and development 1,430 3,015 4,024 10,983 General and administrative 2,724 4,399 7,280 15,780 Total $ 7,711 $ 15,415 $ 21,855 $ 62,192
Summary of RSU Activity	The following summarizes RSU activity: Number of Shares (in thousands) Weighted-Average Grant Date Fair Value RSUs outstanding as of December 31, 2021 3,033 $ 24.29 Granted 2,284 6.16 Vested (342 ) 25.02 Canceled/forfeited (117 ) 23.92 RSUs outstanding as of March 31, 2022 4,858 15.72 Granted 365 6.07 Vested (322 ) 24.69 Canceled/forfeited (120 ) 13.64 RSUs outstanding as of June 30, 2022 4,781 14.43 Granted 232 4.81 Vested (350 ) 23.22 Canceled/forfeited (242 ) 10.47 RSUs outstanding as of September 30, 2022 4,421 13.45
Summary of Nonqualified Stock Option Activity	The following summarizes nonqualified stock option activity: Number of Options (in thousands) Weighted-Average Exercise Price Weighted-Average Remaining Contractual Term (years) Aggregate Intrinsic Value (in thousands) Outstanding as of December 31, 2021 220 $ 15.88 9.7 $ 20 Granted 3,565 6.09 Exercised — — Canceled (14 ) 12.02 Expired — — Outstanding as of March 31, 2022 3,771 6.64 9.9 1,891 Granted 216 6.16 Exercised — — Canceled (89 ) 7.88 Expired — — Outstanding as of June 30, 2022 3,898 6.58 9.7 — Granted 246 4.77 Exercised — — Canceled (242 ) 8.58 Expired — — Outstanding as of September 30, 2022 3,902 6.35 9.4 — Vested and exercisable 42 19.23 6.4 —
Summary of Assumptions used in Black-Scholes Model to Determine Fair Value of Nonqualified Stock Options Granted	The following table presents the assumptions used in the Black-Scholes model to determine the fair value of nonqualified stock options for the three and nine months ended September 30, 2022 and 2021. Three and Nine Months Ended September 30, Three and Nine Months Ended September 30, 2022 2021 Risk free interest rate 1.4% - 2.0% 1.2% Expected volatility 61.5% - 62.7% 61.1% Expected term (in years) 5.9 - 6.0 5.9 Expected dividend yield 0.0% 0.0%

Loss Per Share (Tables)

Loss Per Share (Tables)	9 Months Ended
	Sep. 30, 2022
Earnings Per Share [Abstract]
Calculation of Basic and Diluted Net Loss Per Share	The following Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Numerator Net loss $ (12,426 ) $ (12,160 ) $ (40,081 ) $ (45,127 ) Less: Net loss attributable to noncontrolling interests (9,300 ) (9,623 ) (30,362 ) (35,829 ) Net loss attributable to Viant Technology Inc. $ (3,126 ) $ (2,537 ) $ (9,719 ) $ (9,298 ) Denominator Weighted-average shares of Class A common stock outstanding—basic and diluted 14,306 12,489 14,078 11,894 Loss per share of Class A common stock—basic $ (0.22 ) $ (0.20 ) $ (0.69 ) $ (0.78 ) Loss per share of Class A common stock—diluted $ (0.22 ) $ (0.20 ) $ (0.69 ) $ (0.78 ) Anti-dilutive shares excluded from loss per share of Class A common stock—diluted: Restricted stock units 4,421 3,385 4,421 3,385 Nonqualified stock options 3,902 147 3,902 147 Shares of Class B common stock 47,082 47,137 47,082 47,137 Total shares excluded from loss per share of Class A common stock—diluted 55,405 50,669 55,405 50,669

Noncontrolling Interests (Table

Noncontrolling Interests (Tables)	9 Months Ended
	Sep. 30, 2022
Noncontrolling Interest [Abstract]
Summary Ownership of Viant Technology LLC	The following table summarizes the ownership of Viant Technology LLC: As of September 30, 2022 As of December 31, 2021 Owner Units Owned Ownership Percentage Units Owned Ownership Percentage Viant Technology Inc. 14,460,084 23.5 % 13,704,638 22.5 % Noncontrolling interests 47,082,260 76.5 % 47,107,130 77.5 % Total 61,542,344 100.0 % 60,811,768 100.0 %
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 periods indicated. Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Net loss attributable to Viant Technology Inc. $ (3,126 ) $ (2,537 ) $ (9,719 ) $ (9,298 ) Transfers to noncontrolling interests: Decrease in the additional-paid-in-capital of Viant Technology Inc. resulting from ownership changes in Viant Technology LLC (5,384 ) (40,427 ) (15,115 ) (40,427 ) Change from net loss attributable to Viant Technology Inc. and transfers to noncontrolling interests $ (8,510 ) $ (42,964 ) $ (24,834 ) $ (49,725 )

Nature of Operations - Addition

Nature of Operations - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
	Feb. 12, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Nature Of Operations [Line Items]
Preferred stock, shares authorized	10,000,000	10,000,000		10,000,000
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
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		450,000,000
Common stock shares issued to continuing members		24,870
Underwrites options exercised shares issued	1,500,000
Common stock voting rights percentage	19.50%
Percentage of voting rights of outstanding common stock	100%
Class B Common Stock
Nature Of Operations [Line Items]
Common stock, shares authorized	150,000,000	150,000,000		150,000,000
Common stock shares issued to continuing members		(24,870)
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
Continuing members, membership units	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 Sum_4

Basis of Presentation and Summary of Significant Accounting Policies - Summary of Changes in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2022	Sep. 30, 2021
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]
Beginning balance	$ 105	$ 104	$ 54	$ 54
Provision for doubtful accounts	783	1	51	834	$ (161)
Write-offs, net of recoveries			(1)
Ending balance	$ 888	$ 105	$ 104	$ 888

Basis of Presentation and Sum_5

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022 Customer Supplier	Sep. 30, 2021 Customer	Sep. 30, 2022 Customer Supplier	Sep. 30, 2021 Customer	Dec. 31, 2021 Customer Supplier
ASU 2021-04
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true		true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2022		Jan. 01, 2022
Change in accounting principle, accounting standards update, immaterial effect [true false]	true		true
Credit Concentration Risk | Accounts Receivable
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of customer			0		2
Concentration risk, percentage			10%
Credit Concentration Risk | Customer One | Accounts Receivable
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage					13.20%
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		1		1
Supplier Concentration Risk | Accounts Payable and Accrued Liabilities | Supplier One
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			15.30%		16.80%
Credit Concentration Risk | Individual Customer | Total Revenues
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of customer	0	0	0	0
Concentration risk, percentage	10%	10%	10%	10%

Basis of Presentation and Sum_6

Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Concentrations of Credit Risk (Details) - Advertisings Agency Risk - Consolidated Revenue	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Advertising Agency A
Basis Of Presentations And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	20.30%	16.30%	13.90%	10.20%
Advertising Agency B
Basis Of Presentations And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage				11.80%
Advertising Agency B | Maximum
Basis Of Presentations And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	10%	10%	10%

Revenue - Summary of Disaggrega

Revenue - Summary of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Revenue	$ 48,830	$ 50,857	$ 142,659	$ 141,412
Over-Time Revenue
Disaggregation Of Revenue [Line Items]
Revenue	133	1,136	494	3,344
Point-in-Time Revenue
Disaggregation Of Revenue [Line Items]
Revenue	$ 48,697	$ 49,721	$ 142,165	$ 138,068

Revenue - Additional Informatio

Revenue - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Decrease in revenue recognition due to cash settlement for termination of deferred revenue liabilities	$ 6.2
Expected Duration of Greater Than One Year
Disaggregation Of Revenue [Line Items]
Revenue for unsatisfied performance obligation expected to be recognized in the future, amount		$ 6.6

Property, Equipment and Softw_3

Property, Equipment and Software, Net - Schedule of Major Classes of Property, Equipment and Software (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Total property, equipment and software	$ 74,534	$ 66,682
Less: Accumulated depreciation	(51,853)	(44,351)
Total property, equipment and software, net	22,681	22,331
Capitalized Software Development Costs
Property Plant And Equipment [Line Items]
Total property, equipment and software	69,782	61,490
Computer Equipment
Property Plant And Equipment [Line Items]
Total property, equipment and software	1,056	1,823
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	1,201	1,159
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property, equipment and software	$ 2,463	$ 2,178

Property, Equipment and Softw_4

Property, Equipment and Software, Net - Schedule of Depreciation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Property Plant And Equipment [Line Items]
Depreciation	$ 3,089	$ 2,665	$ 8,905	$ 7,103
Platform Operations
Property Plant And Equipment [Line Items]
Depreciation	2,510	2,080	7,219	5,424
Technology and Development
Property Plant And Equipment [Line Items]
Depreciation	432	421	1,250	1,185
General and Administrative
Property Plant And Equipment [Line Items]
Depreciation	$ 147	$ 164	$ 436	$ 494

Property, Equipment and Softw_5

Property, Equipment and Software, Net - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Property Plant And Equipment [Abstract]
Interest cost incurred	$ 0.1	$ 0.2	$ 0.4	$ 0.7

Leases - Additional Information

Leases - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) Lease	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Lease	Sep. 30, 2021 USD ($)	Jan. 01, 2022 USD ($)
Lessee Lease Description [Line Items]
Operating lease assets	$ 22,816		$ 22,816		$ 21,000
Operating lease liabilities	$ 24,780		$ 24,780		22,000
Reclassification of deferred rent to operating lease liability					$ 1,000
Operating leases for office space remaining lease terms	9 years		9 years
Number of lease | Lease	1		1
Lessee operating lease existence of option to extend			true
Lessee operating lease existence of option to terminate			true
Lessee operating lease option to terminate description			termination options to terminate the leases within one year
Operating lease weighted average remaining lease term	8 years		8 years
Operating lease weighted average incremental borrowing rate	3.10%		3.10%
Operating lease not yet commenced total estimated future lease payments	$ 5,000		$ 5,000
Cash paid for amounts included in operating lease liabilities	300		1,500
Rent expense on operating leases		$ 1,200		$ 3,200
Standby Letters of Credit
Lessee Lease Description [Line Items]
Security deposit	$ 400		$ 400
Maximum
Lessee Lease Description [Line Items]
Lessee operating lease renewal term	5 years		5 years

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022
Leases [Abstract]
Operating lease cost	$ 915	$ 2,542
Short-term lease cost	341	1,045
Variable lease cost	23	113
Total lease cost	$ 1,279	$ 3,700

Leases - Summary of Future Mini

Leases - Summary of Future Minimum Lease Payments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jan. 01, 2022
Leases [Abstract]
Remainder of 2022	$ 813
2023	4,506
2024	4,334
2025	4,270
2026	4,257
Thereafter	14,992
Total undiscounted future lease payments	33,172
Less: Commitments for leases not yet commenced	(5,016)
Less: Imputed interest	(3,376)
Present value of operating lease liabilities	24,780	$ 22,000
Less: Operating lease liabilities, current	(2,813)
Long-term portion of operating lease liabilities	$ 21,967

Leases - Summary of Future Mi_2

Leases - Summary of Future Minimum Payments Under Non-Cancelable Operating Leases (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Leases [Abstract]
2022	$ 3,039
2023	3,953
2024	3,060
2025	2,991
2026	2,974
Thereafter	13,739
Total minimum payments	$ 29,756

Intangible Assets, Net - Summar

Intangible Assets, Net - Summary of Balances of Intangibles Assets and Accumulated Amortization (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Finite Lived Intangible Assets [Line Items]
Gross Amount	$ 8,627	$ 8,627
Accumulated Amortization	(7,682)	(6,841)
Net Carrying Amount	$ 945	$ 1,786
Developed Technology
Finite Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (years)	3 months 18 days	1 year 1 month 6 days
Gross Amount	$ 4,927	$ 4,927
Accumulated Amortization	(4,693)	(4,169)
Net Carrying Amount	$ 234	$ 758
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (years)	1 year 3 months 18 days	2 years 1 month 6 days
Gross Amount	$ 2,300	$ 2,300
Accumulated Amortization	(1,862)	(1,615)
Net Carrying Amount	$ 438	$ 685
Trademarks/Tradenames
Finite Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (years)	3 years 4 months 24 days	4 years
Gross Amount	$ 1,400	$ 1,400
Accumulated Amortization	(1,127)	(1,057)
Net Carrying Amount	$ 273	$ 343

Intangible Assets, Net - Summ_2

Intangible Assets, Net - Summary of Amortization of Intangible Assets Recorded in Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 277	$ 307	$ 841	$ 921
Platform Operations
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	175	175	525	525
General and Administrative
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 102	$ 132	$ 316	$ 396

Intangible Assets, Net - Summ_3

Intangible Assets, Net - Summary of Estimated Future Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Remainder of 2022	$ 277
2023	468
2024	107
2025	80
2026	13
Net Carrying Amount	$ 945	$ 1,786

Accrued Liabilities - Summary o

Accrued Liabilities - Summary of Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Payables And Accruals [Abstract]
Accrued traffic acquisition costs	$ 24,790	$ 30,942
Other accrued liabilities	3,412	3,144
Total accrued liabilities	$ 28,202	$ 34,086

Accrued Liabilities - Additiona

Accrued Liabilities - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Payables And Accruals [Abstract]
Expenses incurred	$ 0.3	$ 0.8	$ 0.2
Payable to related parties	$ 0.2	$ 0.2		$ 0.3

Revolving Credit Facility and_2

Revolving Credit Facility and PPP Loan - Additional Information (Details) - USD ($)			3 Months Ended	9 Months Ended
	Oct. 15, 2021	Apr. 14, 2020	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Line Of Credit Facility [Line Items]
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
Bears interest at an annual rate		1%
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		$ 6,000,000
Paycheck Protection Program Loan | Accrued Interest Forgiveness
Line Of Credit Facility [Line Items]
Debt instrument forgiveness			$ 100,000		$ 100,000
Revolving Credit Facility
Line Of Credit Facility [Line Items]
Line of credit facility, maximum amount outstanding and carrying value				$ 0
Carrying value of revolving credit facility						$ 17,500,000
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
Senior secured revolving credit facility maturity date				Oct. 31, 2024
Weighted average interest rate				0.92%
Outstanding balance				$ 0
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 [Member]
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%
Loan Agreement | Revolving Credit Facility | PNC Bank | LIBOR Rate Loans | Minimum [Member]
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%

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended				9 Months Ended
	Feb. 12, 2021	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected dividend yield assumption		0%			0%	0%	0%
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		232	365	2,284
Unrecognized stock-based compensation expected to be recognized		$ 50.9				$ 50.9
Unrecognized stock-based compensation expected to be recognized over a weighted-average period						2 years 7 months 6 days
Nonqualified Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation expected to be recognized		$ 12.2				$ 12.2
Unrecognized stock-based compensation expected to be recognized over a weighted-average period						3 years 6 months
Weighted-average grant-date fair value of stock options granted		$ 2.78				$ 3.50
LTIP | Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares remained available for grant		3,900				3,900
LTIP | 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	6,200

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Stock-based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-Based Compensation expense	$ 7,711	$ 15,415	$ 21,855	$ 62,192
Platform Operations
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-Based Compensation expense	1,233	3,142	3,622	11,843
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-Based Compensation expense	2,324	4,859	6,929	23,586
Technology and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-Based Compensation expense	1,430	3,015	4,024	10,983
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-Based Compensation expense	$ 2,724	$ 4,399	$ 7,280	$ 15,780

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of RSU Activity (Details) - Restricted Stock Units - $ / shares shares in Thousands	3 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs outstanding, beginning balance	4,781	4,858	3,033
Number of Shares, Granted	232	365	2,284
Number of Shares, Vested	(350)	(322)	(342)
Number of Shares, Canceled/forfeited	(242)	(120)	(117)
RSUs outstanding, ending balance	4,421	4,781	4,858
Weighted-Average Grant-Date Fair Value of RSUs outstanding, beginning balance	$ 14.43	$ 15.72	$ 24.29
Weighted-Average Grant-Date Fair Value of RSUs, Granted	4.81	6.07	6.16
Weighted-Average Grant-Date Fair Value of RSUs, Vested	23.22	24.69	25.02
Weighted-Average Grant-Date Fair Value of RSUs, Canceled/forfeited	10.47	13.64	23.92
Weighted-Average Grant-Date Fair Value of RSUs outstanding, ending balance	$ 13.45	$ 14.43	$ 15.72

Stock-Based Compensation - Su_3

Stock-Based Compensation - Summary of Nonqualified Stock Option Activity (Details) - Nonqualified Stock Options - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended			12 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options outstanding, beginning balance	3,898	3,771	220
Number of Options, Granted	246	216	3,565
Number of Options, Canceled	(242)	(89)	(14)
Number of Options outstanding, ending balance	3,902	3,898	3,771	220
Number of Options outstanding, Vested and exercisable	42
Weighted-Average Exercise Price of outstanding, beginning balance	$ 6.58	$ 6.64	$ 15.88
Weighted-Average Exercise Price, Granted	4.77	6.16	6.09
Weighted-Average Exercise Price, Canceled	8.58	7.88	12.02
Weighted-Average Exercise Price of outstanding, ending balance	6.35	$ 6.58	$ 6.64	$ 15.88
Weighted-Average Exercise Price of outstanding, Vested and exercisable	$ 19.23
Weighted-Average Remaining Contractual Term of outstanding	9 years 4 months 24 days	9 years 8 months 12 days	9 years 10 months 24 days	9 years 8 months 12 days
Weighted-Average Remaining Contractual Term of Options, Vested and exercisable	6 years 4 months 24 days
Aggregate Intrinsic Value of outstanding			$ 1,891	$ 20

Stock-Based Compensation - Su_4

Stock-Based Compensation - Summary of Assumptions used in Black-Scholes Model to Determine Fair Value of Nonqualified Stock Options Granted (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Risk free interest rate		1.20%		1.20%
Risk free interest rate, Minimum	1.40%		1.40%
Risk free interest rate, Maximum	2%		2%
Expected volatility		61.10%		61.10%
Expected volatility, Minimum	61.50%		61.50%
Expected volatility, Maximum	62.70%		62.70%
Expected term (in years)		5 years 10 months 24 days		5 years 10 months 24 days
Expected dividend yield	0%	0%	0%	0%
Minimum [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Expected term (in years)	5 years 10 months 24 days		5 years 10 months 24 days
Maximum
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Expected term (in years)	6 years		6 years

Income Taxes and Tax Receivab_2

Income Taxes and Tax Receivable Agreement - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
U.S. statutory federal income tax rate			21%
Percentage of exclusive of non-controlling interest due to income tax expense/(benefit) not recognize on share of pre-tax book income (loss)			76.50%
Effective tax rate	0%	0%	0%	0%
TRA liability			$ 10.3

Loss Per Share - Calculation of

Loss Per Share - Calculation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended					9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator
Net loss	$ (12,426)	$ (14,092)	$ (13,563)	$ (12,160)	$ (18,095)	$ (40,081)	$ (45,127)
Less: Net loss attributable to noncontrolling interests	(9,300)			(9,623)		(30,362)	(35,829)
Net loss attributable to Viant Technology Inc.	$ (3,126)			$ (2,537)		$ (9,719)	$ (9,298)
Weighted-average shares of Class A common stock outstanding:
Weighted-average shares of Class A common stock outstanding—basic	14,306			12,489		14,078	11,894
Weighted-average shares of Class A common stock outstanding—diluted	14,306			12,489		14,078	11,894
Basic	$ (0.22)			$ (0.20)		$ (0.69)	$ (0.78)
Diluted	$ (0.22)			$ (0.20)		$ (0.69)	$ (0.78)
Anti-dilutive shares excluded from loss per share of Class A common stock—diluted:
Total shares excluded from loss per share of Class A common stock—diluted	55,405			50,669		55,405	50,669
Class A Common Stock
Weighted-average shares of Class A common stock outstanding:
Weighted-average shares of Class A common stock outstanding—basic	14,306			12,489		14,078	11,894
Weighted-average shares of Class A common stock outstanding—diluted	14,306			12,489		14,078	11,894
Class B Common Stock
Anti-dilutive shares excluded from loss per share of Class A common stock—diluted:
Total shares excluded from loss per share of Class A common stock—diluted	47,082			47,137		47,082	47,137
Restricted Stock Units
Anti-dilutive shares excluded from loss per share of Class A common stock—diluted:
Total shares excluded from loss per share of Class A common stock—diluted	4,421			3,385		4,421	3,385
Nonqualified Stock Options
Anti-dilutive shares excluded from loss per share of Class A common stock—diluted:
Total shares excluded from loss per share of Class A common stock—diluted	3,902			147		3,902	147

Noncontrolling Interests - Addi

Noncontrolling Interests - Additional Information (Details) - shares		9 Months Ended
	Feb. 12, 2021	Sep. 30, 2022
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		24,870
Class B Units | Viant Technology LLC
Minority Interest [Line Items]
Exchange of noncontrolling interests, shares		24,870
Class B Common Stock
Minority Interest [Line Items]
Exchange (cancellation) of shares		(24,870)
Class B Common Stock | Viant Technology LLC
Minority Interest [Line Items]
Exchange (cancellation) of shares	48,935,559

Noncontrolling Interests - Summ

Noncontrolling Interests - Summary Ownership of Viant Technology LLC (Details) - Viant Technology LLC - shares	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Minority Interest [Line Items]
Units Owned	61,542,344	60,811,768
Ownership Percentage	100%	100%
Viant Technology Inc.
Minority Interest [Line Items]
Units Owned	14,460,084	13,704,638
Ownership percentage by Viant Technology Inc.	23.50%	22.50%
Non-controlling Interest
Minority Interest [Line Items]
Units Owned	47,082,260	47,107,130
Ownership percentage by non-controlling interests	76.50%	77.50%

Noncontrolling Interests - Su_2

Noncontrolling Interests - Summary of Effect of Changes in Ownership Interest in Viant Technology LLC on Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Noncontrolling Interest [Abstract]
Net loss attributable to Viant Technology Inc.	$ (3,126)	$ (2,537)	$ (9,719)	$ (9,298)
Transfers to noncontrolling interests:
Decrease in the additional-paid-in-capital of Viant Technology Inc. resulting from ownership changes in Viant Technology LLC	(5,384)	(40,427)	(15,115)	(40,427)
Change from net loss attributable to Viant Technology Inc. and transfers to noncontrolling interests	$ (8,510)	$ (42,964)	$ (24,834)	$ (49,725)

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details)	Sep. 30, 2022 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Contractual obligation amount	$ 0