CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	Common Stock		Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance (in shares) at Jan. 31, 2021	[1]		287,918
Beginning balance at Jan. 31, 2021		$ 4,936,471	$ 28	[1]	$ 6,175,425	$ 439	$ (1,239,421)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	[1]		7,082
Issuance of common stock upon exercise of stock options		41,217	$ 2	[1]	41,215
Issuance of common stock under employee stock purchase plan (in shares)	[1]		259
Issuance of common stock under employee stock purchase plan		26,398			26,398
Vesting of early exercised stock options		215			215
Vesting of restricted stock units (in shares)	[1]		531
Stock-based compensation		157,313			157,313
Other comprehensive loss		(73)				(73)
Net loss		(203,220)					(203,220)
Ending balance (in shares) at Apr. 30, 2021	[1]		295,790
Ending balance at Apr. 30, 2021		4,958,321	$ 30	[1]	6,400,566	366	(1,442,641)
Beginning balance (in shares) at Jan. 31, 2022			312,377
Beginning balance at Jan. 31, 2022		$ 5,049,045	$ 31		6,984,669	(16,286)	(1,919,369)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		2,448	2,448
Issuance of common stock upon exercise of stock options		$ 15,130	$ 1		15,129
Issuance of common stock under employee stock purchase plan (in shares)			184
Issuance of common stock under employee stock purchase plan		26,094			26,094
Issuance of common stock in connection with a business combination (in shares)			1,840
Issuance of common stock in connection with a business combination		438,916			438,916
Issuance of common stock in connection with a business combination subject to future vesting (in shares)			409
Vesting of early exercised stock options		61			61
Vesting of restricted stock units (in shares)			848
Shares withheld related to net share settlement of equity awards (in shares)			(292)
Shares withheld related to net share settlement of equity awards		(54,145)			(54,145)
Stock-based compensation		178,988			178,988
Other comprehensive loss		(30,301)				(30,301)
Net loss		(165,794)					(165,794)
Ending balance (in shares) at Apr. 30, 2022			317,814
Ending balance at Apr. 30, 2022		$ 5,457,994	$ 32		$ 7,589,712	$ (46,587)	$ (2,085,163)

[1] On March 1, 2021, all shares of the Company’s then-outstanding Class B common stock were automatically converted into the same number of shares of Class A common stock, pursuant to the terms of the Company’s amended and restated certificate of incorporation. No additional shares of Class B common stock will be issued following such conversion. See Note 10 for further details.