Condensed 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, 2021	294,257
Beginning balance at Jan. 31, 2021	$ 1,221,968,000
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)
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
Ending balance (in shares) at Apr. 30, 2021	0
Ending balance at Apr. 30, 2021	$ 0
Beginning balance (in shares) at Jan. 31, 2021				75,177	110,653
Beginning balance at Jan. 31, 2021	(803,704,000)			$ 1,000	$ 1,000	179,175,000	$ (12,521,000)	$ (970,360,000)
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	1,971,804,000			$ 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)
Issuance of common stock upon exercise of stock options (in shares)				1,881
Issuance of common stock upon exercise of stock options	3,114,000					3,114,000
Vesting of early exercised stock options	1,646,000					1,646,000
Issuance of common stock upon settlement of restricted stock units (in shares)				389
Tax withholdings on settlement of restricted stock units (in shares)				(164)
Tax withholdings on settlement of restricted stock units	(9,218,000)					(9,218,000)
Shares issued as consideration for business acquisition (in shares)				543
Shares issued as consideration for business acquisition	30,446,000					30,446,000
Stock-based compensation	252,986,000					252,986,000
Other comprehensive income (loss), net of tax	4,227,000						4,227,000
Net loss	(239,663,000)							(239,663,000)
Ending balance (in shares) at Apr. 30, 2021				425,326	82,453
Ending balance at Apr. 30, 2021	$ 1,899,541,000			$ 4,000	$ 1,000	3,117,853,000	(8,294,000)	(1,210,023,000)
Beginning balance (in shares) at Jan. 31, 2021	294,257
Beginning balance at Jan. 31, 2021	$ 1,221,968,000
Beginning balance (in shares) at Jan. 31, 2021				75,177	110,653
Beginning balance at Jan. 31, 2021	(803,704,000)			$ 1,000	$ 1,000	179,175,000	(12,521,000)	(970,360,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss), net of tax	16,352,000
Net loss	(462,476,000)	$ (364,403,000)	$ (98,073,000)
Ending balance (in shares) at Oct. 31, 2021				442,357	82,453
Ending balance at Oct. 31, 2021	$ 1,883,405,000			$ 4,000	$ 1,000	3,312,405,000	3,831,000	(1,432,836,000)
Beginning balance (in shares) at Apr. 30, 2021	0
Beginning balance at Apr. 30, 2021	$ 0
Beginning balance (in shares) at Apr. 30, 2021				425,326	82,453
Beginning balance at Apr. 30, 2021	1,899,541,000			$ 4,000	$ 1,000	3,117,853,000	(8,294,000)	(1,210,023,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				2,993
Issuance of common stock upon exercise of stock options	3,537,000					3,537,000
Vesting of early exercised stock options	615,000					615,000
Issuance of common stock upon settlement of restricted stock units (in shares)				2,492
Tax withholdings on settlement of restricted stock units (in shares)				(18)
Tax withholdings on settlement of restricted stock units	(1,175,000)					(1,175,000)
Shares issued as consideration for business acquisition	21,000					21,000
Stock-based compensation	92,744,000					92,744,000
Other comprehensive income (loss), net of tax	3,696,000						3,696,000
Net loss	(100,026,000)							(100,026,000)
Ending balance (in shares) at Jul. 31, 2021				430,793	82,453
Ending balance at Jul. 31, 2021	1,898,953,000			$ 4,000	$ 1,000	3,213,595,000	(4,598,000)	(1,310,049,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				2,848
Issuance of common stock upon exercise of stock options	3,209,000					3,209,000
Vesting of early exercised stock options	462,000					462,000
Issuance of common stock upon settlement of restricted stock units (in shares)				8,720
Tax withholdings on settlement of restricted stock units (in shares)				(4)
Tax withholdings on settlement of restricted stock units	(199,000)					(199,000)
Stock-based compensation	95,338,000					95,338,000
Other comprehensive income (loss), net of tax	8,429,000						8,429,000
Net loss	(122,787,000)	$ (103,747,000)	$ (19,040,000)					(122,787,000)
Ending balance (in shares) at Oct. 31, 2021				442,357	82,453
Ending balance at Oct. 31, 2021	1,883,405,000			$ 4,000	$ 1,000	3,312,405,000	3,831,000	(1,432,836,000)
Beginning balance at Jan. 31, 2022	0
Beginning balance (in shares) at Jan. 31, 2022		458,773	82,453	458,773	82,453
Beginning balance at Jan. 31, 2022	1,921,917,000			$ 4,000	$ 1,000	3,406,959,000	10,899,000	(1,495,946,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				1,283
Issuance of common stock upon exercise of stock options	2,683,000					2,683,000
Vesting of early exercised stock options	1,355,000					1,355,000
Issuance of common stock upon settlement of restricted stock units (in shares)				3,499
Tax withholdings on settlement of restricted stock units (in shares)				(1,125)
Tax withholdings on settlement of restricted stock units	(24,827,000)					(24,827,000)
Stock-based compensation	102,085,000					102,085,000
Other comprehensive income (loss), net of tax	(458,000)						(458,000)
Net loss	(122,561,000)							(122,561,000)
Ending balance (in shares) at Apr. 30, 2022				462,430	82,453
Ending balance at Apr. 30, 2022	1,880,194,000			$ 4,000	$ 1,000	3,488,255,000	10,441,000	(1,618,507,000)
Beginning balance at Jan. 31, 2022	0
Ending balance at Oct. 31, 2022	0
Beginning balance (in shares) at Jan. 31, 2022		458,773	82,453	458,773	82,453
Beginning balance at Jan. 31, 2022	$ 1,921,917,000			$ 4,000	$ 1,000	3,406,959,000	10,899,000	(1,495,946,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	3,788
Charitable donation of Class A common stock (in shares)				300
Repurchase of unvested early exercised stock options (in shares)				(400)
Other comprehensive income (loss), net of tax	$ (3,946,000)
Net loss	(300,663,000)	$ (255,266,000)	$ (45,397,000)
Ending balance (in shares) at Oct. 31, 2022		469,924	82,453	469,924	82,453
Ending balance at Oct. 31, 2022	1,859,824,000			$ 5,000	$ 1,000	3,649,474,000	6,953,000	(1,796,609,000)
Beginning balance (in shares) at Apr. 30, 2022				462,430	82,453
Beginning balance at Apr. 30, 2022	1,880,194,000			$ 4,000	$ 1,000	3,488,255,000	10,441,000	(1,618,507,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				1,418
Issuance of common stock upon exercise of stock options	1,878,000					1,878,000
Issuance of common stock upon settlement of restricted stock units (in shares)				3,183
Issuance of common stock upon settlement of restricted stock units	1,000			$ 1,000
Tax withholdings on settlement of restricted stock units (in shares)				(1,040)
Tax withholdings on settlement of restricted stock units	(18,922,000)					(18,922,000)
Charitable donation of Class A common stock (in shares)				300
Charitable donation of Class A common stock	5,499,000					5,499,000
Shares issued as consideration for business acquisition (in shares)				570
Shares issued as consideration for business acquisition	2,965,000					2,965,000
Issuance of common stock under employee stock purchase plan (in shares)				578
Issuance of common stock under employee stock purchase plan	9,070,000					9,070,000
Repurchase of unvested early exercised stock options (in shares)				(441)
Stock-based compensation	88,533,000					88,533,000
Other comprehensive income (loss), net of tax	709,000						709,000
Net loss	(120,378,000)							(120,378,000)
Ending balance (in shares) at Jul. 31, 2022				466,998	82,453
Ending balance at Jul. 31, 2022	1,849,549,000			$ 5,000	$ 1,000	3,577,278,000	11,150,000	(1,738,885,000)
Ending balance at Oct. 31, 2022	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				1,087
Issuance of common stock upon exercise of stock options	2,889,000					2,889,000
Issuance of common stock upon settlement of restricted stock units (in shares)				2,790
Tax withholdings on settlement of restricted stock units (in shares)				(951)
Tax withholdings on settlement of restricted stock units	(11,998,000)					(11,998,000)
Stock-based compensation	81,305,000					81,305,000
Other comprehensive income (loss), net of tax	(4,197,000)						(4,197,000)
Net loss	(57,724,000)	$ (49,073,000)	$ (8,651,000)					(57,724,000)
Ending balance (in shares) at Oct. 31, 2022		469,924	82,453	469,924	82,453
Ending balance at Oct. 31, 2022	$ 1,859,824,000			$ 5,000	$ 1,000	$ 3,649,474,000	$ 6,953,000	$ (1,796,609,000)