Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (230,618)	$ (132,696)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	3,060	1,543
Net amortization of premiums or discounts on marketable securities	236	964
Amortization of debt issuance costs	1,883	0
Amortization of deferred contract acquisition costs	17,395	11,583
Non-cash operating lease costs	4,475	5,604
Common stock charitable donation expense	0	13,290
Stock-based compensation, net of amounts capitalized	126,235	47,869
Deferred income taxes	26	1,730
Other	559	648
Changes in operating assets and liabilities:
Accounts receivable	(12,462)	(11,853)
Deferred contract acquisition costs	(22,723)	(26,348)
Prepaid expenses and other assets	(20,121)	(14,723)
Accounts payable	7,452	371
Accrued expenses and other liabilities	1,756	12,893
Operating lease liabilities	(4,910)	(5,382)
Deferred revenue	39,254	31,352
Net cash used in operating activities	(88,503)	(63,155)
CASH FLOWS FROM INVESTING ACTIVITIES
Capitalization of internal-use software costs	(4,765)	(1,811)
Purchases of marketable securities	(1,167,362)	(55,971)
Maturities of marketable securities	370,659	122,974
Purchases of property and equipment	(2,071)	(1,673)
Other	0	9
Net cash (used in) provided by investing activities	(803,539)	63,528
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from initial public offering, net of underwriting discounts and commissions		786,600
Proceeds from issuance of common stock upon exercise of vested options	24,383	18,705
Proceeds from issuance of common stock upon early exercise of unvested options	416	18,756
Repurchases of unvested options	(695)	(213)
Payments of deferred offering costs	0	(920)
Payments of debt issuance costs for convertible senior notes	(786)	0
Proceeds from issuance of common stock under the ESPP	22,485	0
Net cash provided by financing activities	45,803	822,928
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(26)	(10)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(846,265)	823,291
Cash, cash equivalents, and restricted cash at beginning of period	1,376,682	37,806
Cash, cash equivalents, and restricted cash at end of period	530,417	861,097
Reconciliation of cash, cash equivalents, and restricted cash within the consolidated balance sheets to the amounts shown above:
Cash and cash equivalents	529,667	860,347
Restricted cash included in other assets, current and non-current	750	750
Total cash, cash equivalents, and restricted cash	530,417	861,097
Cash paid for:
Income taxes	2,225	954
Non-cash investing and financing activities:
Stock-based compensation capitalized as internal-use software costs	3,125	494
Issuance of common stock upon exercise of vested options included in prepaid expenses and other current assets	0	432
Vesting of early exercised stock options	8,794	4,182
Unpaid deferred offering costs	$ 0	$ 2,411