Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Cash flows from operating activities:
Net loss		$ (525,586)	$ (92,393)	$ (519,933)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization		14,705	12,335	8,666
Amortization of deferred contract acquisition costs		39,257	40,997	30,450
Reversal of deferred contract acquisition costs and accrued sales commissions, net		0	(9,229)	0
Net amortization of premium on marketable securities		1,954	263	0
Impairment charges on assets		0	0	1,026
Stock-based compensation expense		515,583	86,167	137,862
Amortization of operating lease right-of-use assets		8,875	7,266	7,019
Deferred income taxes		(5,832)	(7,587)	(1,324)
Other non-cash charges, net	[1]	1,983	1,019	928
Changes in operating assets and liabilities:
Accounts receivable		(86,387)	(76,907)	(52,146)
Contract assets		(43,660)	(21,964)	(5,083)
Deferred contract acquisition costs		(130,186)	(51,058)	(61,037)
Prepaid expenses and other assets		(15,360)	(8,564)	(20,625)
Accounts payable		3,507	1,893	(14,557)
Accrued expenses and other liabilities		45,729	6,122	18,763
Accrued compensation and benefits		24,038	49,924	17,735
Operating lease liabilities, net		(9,064)	(8,080)	(5,064)
Deferred revenue		105,481	98,973	97,884
Net cash (used in) provided by operating activities		(54,963)	29,177	(359,436)
Cash flows from investing activities:
Purchases of marketable securities		(212,512)	(103,108)	0
Sales of marketable securities		89,383	0	0
Maturities of marketable securities		107,745	0	0
Purchases of property and equipment		(8,879)	(1,953)	(15,748)
Payments related to business acquisitions, net of cash acquired		(5,498)	(19,690)	(18,525)
Capitalized software development costs		(2,950)	(1,240)	(5,233)
Purchases of intangible assets		(1,231)	0	0
Purchases of investments		(1,500)	0	0
Net cash used in investing activities		(35,442)	(125,991)	(39,506)
Cash flows from financing activities:
Proceeds from initial public offering, net of underwriting discounts and commissions		692,369	0	0
Payments of initial public offering costs		(3,734)	(732)	0
Proceeds from issuance of convertible preferred stock		750,000	225,903	583,600
Issuance costs related to convertible preferred stock		(164)	(324)	(591)
Proceeds from exercise of stock options		12,197	26,379	3,599
Payments of tax withholdings on net settlement of equity awards		(10,467)	0	0
Net receipts of tax withholdings on sell-to-cover equity award transactions		10,432	0	0
Proceeds from employee stock purchase plan contributions		19,040	0	0
Repurchase and retirement of common stock		0	0	(128,843)
Proceeds from credit agreement		0	78,587	0
Repayment of credit agreement		0	(78,587)	0
Payment of deferred loan costs related to senior secured credit facility		0	(808)	0
Net cash provided by financing activities		1,469,673	250,418	457,765
Effect of exchange rate changes		18,265	(16,545)	3,190
Net increase in cash, cash equivalents and restricted cash		1,397,533	137,059	62,013
Cash, cash equivalents and restricted cash - beginning of period		371,190	234,131	172,118
Cash, cash equivalents and restricted cash - end of period		1,768,723	371,190	234,131
Supplemental disclosures of cash flow information:
Cash paid for interest		691	1,708	96
Cash paid for income taxes		8,454	4,509	3,525
Supplemental disclosures of non-cash investing and financing activity:
Stock-based compensation capitalized for software development		4,487	261	398
Value of shares issued in payment of business acquisition		30,467	0	0
Deferred consideration		0	0	18,591
Reduction in accrued expenses and other liabilities for vesting of early exercised stock options		3,017	1,762	0
Tax withholdings on net settlement of restricted stock units, accrued and unpaid		270	0	0
Property and equipment included in accounts payable		$ 1,863	$ 0	$ 0

[1] (1) Prior period amounts have been combined to conform to current presentation