Description of Business - Additional Information (Details) - USD ($)			12 Months Ended
	Sep. 25, 2020	Sep. 24, 2020	Dec. 31, 2020	Dec. 31, 2018	Sep. 13, 2020	Dec. 31, 2019	Dec. 31, 2017	Oct. 07, 2015
Description Of Business [Line Items]
Entity incorporation month and year			2015-09
Offering price per share			$ 5.94
Proceeds from issuance of common stock in initial public offering, net of underwriting discounts and commissions			$ 891,793,000
Redeemable convertible preferred stock carrying value						$ 737,009,000
Preferred stock, shares authorized		50,000,000	50,000			0
Preferred stock, par value		$ 0.0001	$ 0.0001			$ 0.0001
Percentage of aggregate outstanding shares of common stock to be cease			10.00%
Common stock conversion term			Each share of Class B Common Stock is convertible into one share of Class A Common Stock at any time at the option of the holder and will automatically convert to Class A Common Stock upon any transfer, except for certain permitted transfers. All Class B Common Stock will convert automatically into an equivalent number of Class A Common Stock upon the earlier of (i) September 25, 2027; and (ii) the first date the aggregate number of shares of Class B Common Stock cease to represent at least 10% of the aggregate outstanding shares of common stock.
Common Class A
Description Of Business [Line Items]
Common stock, par value		$ 0.0001	$ 0.0001			$ 0.0001
Common stock, shares authorized		2,000,000,000	2,000,000,000			0
Conversion of stock, shares converted		10,098,121
Common stock voting rights			one vote per share
Redeemable Convertible Preferred Stock
Description Of Business [Line Items]
Redeemable convertible preferred stock converted into common stock		126,045,531		5,654,000
Redeemable convertible preferred stock carrying value		$ 737,000,000		$ 737,009,000		$ 737,009,000	$ 166,777,000
Common Class B
Description Of Business [Line Items]
Common stock, par value		$ 0.0001	$ 0.0001			$ 0.0001
Common stock, shares authorized		1,000,000,000	1,000,000,000			0
Conversion of stock, shares converted		357,265,256
Common stock voting rights			10 votes per share
Initial Public Offering
Description Of Business [Line Items]
Sale of stock, description of transaction			The Company’s registration statement on Form S-1 (“IPO Registration Statement”) related to its initial public offering (“IPO”) was declared effective on September 22, 2020, and the Company’s Class A common stock began trading on the Nasdaq Global Select Market on September 23, 2020.
Sale of stock, transaction date			Sep. 25, 2020
Number of aggregate shares sold by existing stockholders	11,192,657
Proceeds from issuance of common stock in initial public offering, net of underwriting discounts and commissions	$ 886,900,000
Underwriting discounts and commissions	52,500,000
Other offering expenses	$ 4,900,000
Initial Public Offering | Common Class A
Description Of Business [Line Items]
Stock issued during period	39,807,691		28,615,000
Common stock, par value	$ 0.0001
Offering price per share	$ 33.00
Initial Public Offering | Class A and Class B Common Stock
Description Of Business [Line Items]
Stock issued during period	28,615,034
Initial Public Offering | Redeemable Convertible Preferred Stock
Description Of Business [Line Items]
Redeemable convertible preferred stock converted into common stock			126,046,000
Underwriters’ Option to Purchase Additional Shares
Description Of Business [Line Items]
Stock issued during period	5,192,307
Private Placement | Common Class A
Description Of Business [Line Items]
Stock issued during period			3,030,000
Private Placement | Common Class A | Related Party
Description Of Business [Line Items]
Stock issued during period	3,030,303
Stock purchase agreement, authorized amount					$ 100,000,000
GoodRx, Inc.
Description Of Business [Line Items]
Percentage of outstanding shares acquired								100.00%