Consolidated Statements of Convertible Preferred Stock and Stockholders Equity (Deficit) - USD ($) shares in Thousands	Total	Class A Common Stock	Class B Common Stock	Common stock Class A Common Stock	Common stock Class B Common Stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Accumulated deficit
Beginning Balance (in shares) at Jan. 31, 2020	282,108
Beginning Balance at Jan. 31, 2020	$ 996,389,000
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of convertible preferred stock, net of issuance costs (in shares)	12,149
Issuance of convertible preferred stock, net of issuance costs	$ 225,579,000
Ending Balance (in shares) at Jan. 31, 2021	294,257
Ending Balance at Jan. 31, 2021	$ 1,221,968,000
Beginning Balance (in shares) at Jan. 31, 2020				41,883	115,741
Beginning Balance at Jan. 31, 2020	(799,511,000)			$ 0	$ 1,000	$ 72,229,000	$ 6,226,000	$ (877,967,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options and restricted stock awards (in shares)				28,196
Issuance of common stock upon exercise of stock options and restricted stock awards	20,519,000			$ 1,000		20,518,000
Issuance of common stock upon vesting/settlement of restricted stock (in shares)				10
Issuance of common stock upon vesting/settlement of restricted stock	373,000					373,000
Stock-based compensation expense related to common stock secondary transactions (in shares)				5,088	(5,088)
Stock-based compensation expense related to common stock secondary transactions	4,983,000					4,983,000
Stock-based compensation	81,072,000					81,072,000
Other comprehensive (loss) income, net of tax	(18,747,000)						(18,747,000)
Net loss	(92,393,000)	$ (29,243,000)	$ (63,150,000)					(92,393,000)
Ending Balance (in shares) at Jan. 31, 2021				75,177	110,653
Ending Balance at Jan. 31, 2021	$ (803,704,000)			$ 1,000	$ 1,000	179,175,000	(12,521,000)	(970,360,000)
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	$ 749,836,000
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	$ (1,971,804,000)
Ending Balance (in shares) at Jan. 31, 2022	0
Ending Balance at Jan. 31, 2022	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon vesting/settlement of restricted stock (in shares)				25,280
Issuance of common stock upon exercise of stock options (in shares)				10,048
Issuance of common stock upon exercise of stock options	12,345,000					12,345,000
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	1,971,804,000			$ 3,000		1,971,801,000
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	687,903,000					687,903,000
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	30,467,000					30,467,000
Vesting of early exercised stock options	3,017,000					3,017,000
Issuance of common stock under the employee stock purchase plan (in shares)				411
Issuance of common stock under the employee stock purchase plan	14,462,000					14,462,000
Tax withholdings on settlement of restricted stock units (in shares)				(186)
Tax withholdings on settlement of restricted stock units	(10,591,000)					(10,591,000)
Stock-based compensation	518,380,000					518,380,000
Other comprehensive (loss) income, net of tax	23,420,000						23,420,000
Net loss	(525,586,000)	$ (423,296,000)	$ (102,290,000)					(525,586,000)
Ending Balance (in shares) at Jan. 31, 2022		458,773	82,453	458,773	82,453
Ending Balance at Jan. 31, 2022	1,921,917,000			$ 4,000	$ 1,000	3,406,959,000	10,899,000	(1,495,946,000)
Ending Balance at Jan. 31, 2023	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon vesting/settlement of restricted stock (in shares)				13,644
Issuance of common stock upon vesting/settlement of restricted stock	$ 1,000			$ 1,000
Issuance of common stock upon exercise of stock options (in shares)	4,770			4,770
Issuance of common stock upon exercise of stock options	$ 8,245,000					8,245,000
Shares issued in connection with business acquisition (in shares)				570
Shares issued in connection with business acquisition	2,965,000					2,965,000
Vesting of early exercised stock options	1,357,000					1,357,000
Issuance of common stock under the employee stock purchase plan (in shares)				1,190
Issuance of common stock under the employee stock purchase plan	15,804,000					15,804,000
Tax withholdings on settlement of restricted stock units (in shares)				(4,646)
Tax withholdings on settlement of restricted stock units	(75,181,000)					(75,181,000)
Charitable donation of Class A common stock (in shares)				300
Charitable donation of Class A common stock	5,499,000					5,499,000
Repurchase of unvested early exercised stock options (in shares)				(441)
Stock-based compensation	371,190,000					371,190,000
Other comprehensive (loss) income, net of tax	(3,287,000)						(3,287,000)
Net loss	(328,352,000)	$ (278,950,000)	$ (49,402,000)					(328,352,000)
Ending Balance (in shares) at Jan. 31, 2023		474,160	82,453	474,160	82,453
Ending Balance at Jan. 31, 2023	$ 1,920,158,000			$ 5,000	$ 1,000	$ 3,736,838,000	$ 7,612,000	$ (1,824,298,000)