CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Cash flows from operating activities:
Net loss	$ (392,939)	$ (171,278)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	10,068	3,762
Non-cash operating lease costs	17,040	16,337
Amortization of deferred commissions	17,157	14,066
Stock-based compensation, net of amounts capitalized	315,005	38,649
Net amortization of premiums on investments	25,351	226
Unrealized gains on strategic investments in privately-held equity securities	(8,060)	0
Other	2,782	4,049
Changes in operating assets and liabilities, net of effect of business combinations:
Accounts receivable	55,896	27,129
Deferred commissions	(33,931)	(14,266)
Prepaid expenses and other assets	(70,088)	(1,452)
Accounts payable	3,722	(2,843)
Accrued expenses and other liabilities	23,720	10,993
Operating lease liabilities	(15,992)	(17,404)
Deferred revenue	66,012	46,755
Net cash provided by (used in) operating activities	15,743	(45,277)
Cash flows from investing activities:
Purchases of property and equipment	(9,927)	(6,748)
Capitalized internal-use software development costs	(4,824)	(3,170)
Cash paid for business combinations, net of cash acquired	0	(6,035)
Purchases of intangible assets	(11,182)	(6,184)
Purchases of investments	(1,988,633)	(612,635)
Sales of investments	392,312	3,510
Maturities and redemptions of investments	1,394,223	189,859
Net cash used in investing activities	(228,031)	(441,403)
Cash flows from financing activities:
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs	0	478,573
Proceeds from early exercised stock options	0	159
Proceeds from exercise of stock options	65,865	20,736
Proceeds from issuance of common stock under the employee stock purchase plan	26,398	0
Proceeds from repayments of a nonrecourse promissory note	0	2,090
Repurchases of early exercised stock options	0	(30)
Payments of deferred offering costs	0	(2,336)
Payment of deferred purchase consideration for a business combination	0	(600)
Net cash provided by financing activities	92,263	498,592
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	215	0
Net increase (decrease) in cash, cash equivalents, and restricted cash	(119,810)	11,912
Cash, cash equivalents, and restricted cash—beginning of period	835,193	141,976
Cash, cash equivalents, and restricted cash—end of period	715,383	153,888
Supplemental disclosures of non-cash investing and financing activities:
Property and equipment included in accounts payable and accrued expenses	1,190	8,349
Stock-based compensation included in capitalized software development costs	13,058	736
Intangible assets included in accrued expenses and other liabilities	4,544	0
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	698,548	138,900
Restricted cash – included in other assets and prepaid expenses and other current assets	16,835	14,988
Total cash, cash equivalents, and restricted cash	$ 715,383	$ 153,888