CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenue	$ 497,999	$ 371,022	$ 249,659
Cost of revenue	95,772	78,030	52,492
Gross profit	402,227	292,992	197,167
Operating expense:
Research and development	135,543	120,407	69,210
Sales and marketing	343,207	260,345	133,277
General and administrative	156,849	117,022	50,792
Total operating expenses	635,599	497,774	253,279
Loss from operations	(233,372)	(204,782)	(56,112)
Interest and other income, net	12,582	23,303	2,833
Loss before income taxes	(220,790)	(181,479)	(53,279)
Provision for income taxes	11,342	10,516	4,015
Net loss	(232,132)	(191,995)	(57,294)
Accretion of redeemable convertible preferred stock	0	(2,646,662)	(1,560,524)
Net loss attributable to common stockholders - basic and diluted
Net loss attributable to common stockholders - basic	(232,132)	(2,838,657)	(1,617,818)
Net loss attributable to common stockholders - diluted	$ (232,132)	$ (2,838,657)	$ (1,617,818)
Net loss attributable to common stockholders - basic and diluted
Net loss per share attributable to Class A and Class B common stockholders - basic (in dollars per share)	$ (0.82)	$ (21.73)	$ (21.03)
Net loss per share attributable to Class A and Class B common stockholders - diluted (in dollars per share)	$ (0.82)	$ (21.73)	$ (21.03)
Weighted average shares used in computing net loss per share attributable to common stockholders - basic and diluted
Weighted-average shares used in computing net loss per share attributable to common stockholders - diluted (in shares)	284,587	130,652	76,945
Weighted-average shares used in computing net loss per share attributable to common stockholders - basic (in shares)	284,587	130,652	76,945