Consolidated Statements of Convertible Preferred Stock and Stockholders Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Class A Common Stock	Class B Common Stock	Common stock Class A Common Stock	Common stock Class B Common Stock	Treasury stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Accumulated deficit
Beginning Balance (in shares) at Jan. 31, 2021	294,257
Beginning Balance at Jan. 31, 2021	$ 1,221,968
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of convertible preferred stock, net of issuance costs (in shares)	12,043
Issuance of convertible preferred stock, net of issuance costs	$ 749,836
Conversion of convertible preferred stock to common stock upon initial public offering (in shares)	(306,300)
Conversion of convertible preferred stock to common stock upon initial public offering	$ (1,971,804)
Ending Balance (in shares) at Jan. 31, 2022	0
Ending Balance at Jan. 31, 2022	$ 0
Beginning Balance (in shares) at Jan. 31, 2021				75,177	110,653
Beginning balance at Jan. 31, 2021	(803,704)			$ 1	$ 1		$ 179,175	$ (12,521)	$ (970,360)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of convertible preferred stock to common stock upon initial public offering (in shares)				306,300
Conversion of convertible preferred stock to common stock upon initial public offering	1,971,804			$ 3			1,971,801
Issuance of common stock upon initial public offering, net of underwriting discounts and commissions and other issuance costs (in shares)				13,000
Issuance of common stock upon initial public offering, net of underwriting discounts and commissions and other issuance costs	687,903						687,903
Conversion of shares of Class B common stock into shares of Class A common stock (in shares)				28,200	28,200
Shares issued in connection with business acquisition (in shares)				543
Shares issued in connection with business acquisition	30,467						30,467
Issuance of common stock upon exercise of stock options (in shares)				10,048
Issuance of common stock upon exercise of stock options	12,345						12,345
Vesting of early exercised stock options	3,017						3,017
Issuance of common stock under the employee stock purchase plan (in shares)				411
Issuance of common stock under the employee stock purchase plan	14,462						14,462
Issuance of common stock upon settlement of restricted stock units (in shares)				25,280
Tax withholdings on settlement of restricted stock units (in shares)				(186)
Tax withholdings on settlement of restricted stock units	(10,591)						(10,591)
Stock-based compensation	518,380						518,380
Other comprehensive income (loss), net of tax	23,420							23,420
Net loss	(525,586)	$ (423,296)	$ (102,290)						(525,586)
Ending Balance (in shares) at Jan. 31, 2022				458,773	82,453
Ending balance at Jan. 31, 2022	1,921,917			$ 4	$ 1		3,406,959	10,899	(1,495,946)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued in connection with business acquisition (in shares)				570
Shares issued in connection with business acquisition	2,965						2,965
Issuance of common stock upon exercise of stock options (in shares)				4,770
Issuance of common stock upon exercise of stock options	8,245						8,245
Vesting of early exercised stock options	1,357						1,357
Issuance of common stock under the employee stock purchase plan (in shares)				1,190
Issuance of common stock under the employee stock purchase plan	15,804						15,804
Issuance of common stock upon settlement of restricted stock units (in shares)				13,644
Issuance of common stock upon settlement of restricted stock units	1			$ 1
Tax withholdings on settlement of restricted stock units (in shares)				(4,646)
Tax withholdings on settlement of restricted stock units	(75,181)						(75,181)
Charitable donation of Class A common stock (in shares)				300
Charitable donation of Class A common stock	5,499						5,499
Repurchase of unvested early exercised stock options (in shares)				(441)
Stock-based compensation	371,190						371,190
Other comprehensive income (loss), net of tax	(3,287)							(3,287)
Net loss	(328,352)	$ (278,950)	$ (49,402)						(328,352)
Ending Balance (in shares) at Jan. 31, 2023		474,160	82,453	474,160	82,453	0
Ending balance at Jan. 31, 2023	$ 1,920,158			$ 5	$ 1	$ 0	3,736,838	7,612	(1,824,298)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	5,221			5,221
Issuance of common stock upon exercise of stock options	$ 6,728						6,728
Vesting of early exercised stock options	2						2
Issuance of common stock under the employee stock purchase plan (in shares)				1,364
Issuance of common stock under the employee stock purchase plan	17,313						17,313
Issuance of common stock upon settlement of restricted stock units (in shares)				17,695
Issuance of common stock upon settlement of restricted stock units				$ 0
Tax withholdings on settlement of restricted stock units (in shares)				(6,061)
Tax withholdings on settlement of restricted stock units	(113,162)						(113,162)
Charitable donation of Class A common stock (in shares)				281
Charitable donation of Class A common stock	4,215						4,215
Repurchase of Class A common stock (in shares)				(5,800)		(5,840)
Repurchase of Class A common stock	(102,615)					$ (102,615)
Stock-based compensation	372,145						372,145
Other comprehensive income (loss), net of tax	1,213							1,213
Net loss	(89,883)	$ (76,739)	$ (13,144)						(89,883)
Ending Balance (in shares) at Jan. 31, 2024		492,660	82,453	492,660	82,453	(5,840)
Ending balance at Jan. 31, 2024	$ 2,016,114			$ 5	$ 1	$ (102,615)	$ 4,024,079	$ 8,825	$ (1,914,181)