Organization and Business Description	12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]
Organization and Business Description	1. Organization and Business Description CarGurus, Inc. (the "Company") is a multinational, online automotive platform for buying and selling vehicles that is building upon its industry-leading listings marketplace with both digital retail solutions and the CarOffer, LLC ("CarOffer") online wholesale platform. The CarGurus platform gives consumers the confidence to purchase and/or sell a vehicle either online or in person, and it gives dealerships the power to accurately price, effectively market, instantly acquire, and quickly sell vehicles, all with a nationwide reach. The Company uses proprietary technology, search algorithms, and data analytics to bring trust, transparency, and competitive pricing to the automotive shopping experience. The Company operates principally in the United States (the “U.S.”). In the U.S., it also operates as independent brands the Autolist online marketplace and the CarOffer online wholesale platform, both of which it wholly owns. In addition to the U.S., the Company operates online marketplaces under the CarGurus brand in Canada and the United Kingdom (the “U.K.”). In the U.K., it also operates as an independent brand the PistonHeads online marketplace, which it wholly owns. The Company has subsidiaries in the U.S., Canada, Ireland, and the U.K. and additionally it has two reportable segments, U.S. Marketplace and Digital Wholesale. See Note 14 of these consolidated financial statements for further segment reporting and geographic information. The Company is subject to a number of risks and uncertainties common to companies in its and similar industries and stages of development including, but not limited to, rapid technological changes, competition from substitute products and services from larger companies, management of international activities, protection of proprietary rights, patent litigation, and dependence on key individuals.

Organization and Business Description

12 Months Ended

Dec. 31, 2023

1. Organization and Business Description

CarGurus, Inc. (the "Company") is a multinational, online automotive platform for buying and selling vehicles that is building upon its industry-leading listings marketplace with both digital retail solutions and the CarOffer, LLC ("CarOffer") online wholesale platform. The CarGurus platform gives consumers the confidence to purchase and/or sell a vehicle either online or in person, and it gives dealerships the power to accurately price, effectively market, instantly acquire, and quickly sell vehicles, all with a nationwide reach. The Company uses proprietary technology, search algorithms, and data analytics to bring trust, transparency, and competitive pricing to the automotive shopping experience.

The Company operates principally in the United States (the “U.S.”). In the U.S., it also operates as independent brands the Autolist online marketplace and the CarOffer online wholesale platform, both of which it wholly owns. In addition to the U.S., the Company operates online marketplaces under the CarGurus brand in Canada and the United Kingdom (the “U.K.”). In the U.K., it also operates as an independent brand the PistonHeads online marketplace, which it wholly owns.

The Company has subsidiaries in the U.S., Canada, Ireland, and the U.K. and additionally it has two reportable segments, U.S. Marketplace and Digital Wholesale. See Note 14 of these consolidated financial statements for further segment reporting and geographic information.

The Company is subject to a number of risks and uncertainties common to companies in its and similar industries and stages of development including, but not limited to, rapid technological changes, competition from substitute products and services from larger companies, management of international activities, protection of proprietary rights, patent litigation, and dependence on key individuals.