CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Cash flows from operating activities:
Net loss	$ (165,794)	$ (203,220)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	9,941	4,684
Non-cash operating lease costs	10,091	8,509
Amortization of deferred commissions	13,201	8,316
Stock-based compensation, net of amounts capitalized	172,493	151,014
Net amortization of premiums on investments	8,198	13,019
Net unrealized losses on strategic investments in marketable equity securities	8,859	0
Deferred income tax	(26,664)	0
Other	1,761	1,214
Changes in operating assets and liabilities, net of effects of a business combination:
Accounts receivable	266,656	127,179
Deferred commissions	(16,718)	(14,749)
Prepaid expenses and other assets	(57,535)	(54,357)
Accounts payable	4,158	(1,245)
Accrued expenses and other liabilities	(14,217)	(6,567)
Operating lease liabilities	(8,376)	(7,833)
Deferred revenue	(21,441)	(4,110)
Net cash provided by operating activities	184,613	21,854
Cash flows from investing activities:
Purchases of property and equipment	(7,413)	(6,430)
Capitalized internal-use software development costs	(4,804)	(2,480)
Cash paid for a business combination, net of cash and cash equivalents acquired	(177,925)	0
Purchases of intangible assets	0	(10,460)
Purchases of investments	(897,291)	(1,145,670)
Sales of investments	10,974	384,383
Maturities and redemptions of investments	886,667	516,588
Net cash used in investing activities	(189,792)	(264,069)
Cash flows from financing activities:
Proceeds from exercise of stock options	15,276	41,402
Proceeds from issuance of common stock under employee stock purchase plan	26,094	26,398
Taxes paid related to net share settlement of equity awards	(53,216)	0
Net cash provided by (used in) financing activities	(11,846)	67,800
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(5,098)	19
Net decrease in cash, cash equivalents, and restricted cash	(22,123)	(174,396)
Cash, cash equivalents, and restricted cash—beginning of period	1,102,534	835,193
Cash, cash equivalents, and restricted cash—end of period	1,080,411	660,797
Supplemental disclosures of non-cash investing and financing activities
Property and equipment included in accounts payable and accrued expenses	4,782	3,469
Stock-based compensation included in capitalized software development costs	6,291	6,210
Issuance of common stock in connection with a business combination	438,916	0
Purchases of intangible assets included in accrued expenses and other liabilities	0	5,039
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	1,063,401	644,674
Restricted cash—included in other assets and prepaid expenses and other current assets	17,010	16,123
Total cash, cash equivalents, and restricted cash	$ 1,080,411	$ 660,797