Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Class A and Class B Common Stock Class A and Class B Common Stock
Shares, beginning of period (in shares) at Jan. 31, 2023					286,763,857
Balance, beginning of period at Jan. 31, 2023	$ 1,656,705	$ 2,663,394	$ (6,367)	$ (1,000,351)	$ 29
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)					3,701,792
Issuance of common stock upon exercise of stock options	9,762	9,762
Vesting of restricted stock units (in shares)					759,416
Repurchase of common stock	49	49
Stock-based compensation	56,773	56,773
Other comprehensive loss	754		754
Net loss	(106,869)			(106,869)
Shares, end of period (in shares) at Apr. 30, 2023					291,225,065
Balance, end of period at Apr. 30, 2023	1,617,174	2,729,978	(5,613)	(1,107,220)	$ 29
Shares, beginning of period (in shares) at Jan. 31, 2024					304,691,722
Balance, beginning of period at Jan. 31, 2024	1,594,043	2,934,607	(1,550)	(1,339,044)	$ 30
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)					2,345,516
Issuance of common stock upon exercise of stock options	6,555	6,554			$ 1
Stock Issued During Period, Value, Acquisitions	$ 23,739	23,738			$ 1
Issuance of common stock in connection with acquisition (in shares)					2,354,607
Vesting of restricted stock units (in shares)					2,183,744
Repurchase of common stock (shares)	(19,300)
Stock-based compensation	$ 62,631	62,631
Other comprehensive loss	(1,243)		(1,243)
Net loss	(70,105)			(70,105)
Shares, end of period (in shares) at Apr. 30, 2024					311,556,289
Balance, end of period at Apr. 30, 2024	$ 1,615,620	$ 3,027,530	$ (2,793)	$ (1,409,149)	$ 32