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Document and Entity Information
Aug. 24, 2021
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001637873
Document Type 8-K
Document Period End Date Aug. 24, 2021
Entity Registrant Name ACV Auctions Inc.
Entity Incorporation State Country Code DE
Entity File Number 001-40256
Entity Tax Identification Number 47-2415221
Entity Address, Address Line One 640 Ellicott Street
Entity Address, Address Line Two #321
Entity Address, City or Town Buffalo
Entity Address, State or Province NY
Entity Address, Postal Zip Code 14203
City Area Code (800)
Local Phone Number 553-4070
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Class A common stock, par value $0.001 per share
Trading Symbol ACVA
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Entity Ex Transition Period false