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Document and Entity Information
Jun. 04, 2025
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001494259
Document Type 8-K
Document Period End Date Jun. 04, 2025
Entity Registrant Name CarGurus, Inc.
Entity Incorporation State Country Code DE
Entity File Number 001-38233
Entity Tax Identification Number 04-3843478
Entity Address, Address Line One 1001 Boylston Street
Entity Address, Address Line Two 16th Floor
Entity Address, City or Town Boston
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02115
City Area Code (617)
Local Phone Number 354-0068
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 CARG
Security Exchange Name NASDAQ
Entity Emerging Growth Company false