CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenue	$ 234,517	$ 152,428	$ 446,684	$ 290,483
Cost of revenue	55,804	35,029	102,855	67,113
Gross profit	178,713	117,399	343,829	223,370
Operating expenses:
Sales and marketing	117,622	75,995	217,679	145,969
Research and development	75,114	41,349	142,168	80,876
General and administrative	50,518	28,927	88,547	56,651
Total operating expenses	243,254	146,271	448,394	283,496
Loss from operations	(64,541)	(28,872)	(104,565)	(60,126)
Non-operating income (expense):
Interest income	1,641	373	2,702	917
Interest expense	(1,040)	(10,444)	(2,597)	(20,678)
Other income (expense), net	233	(877)	(254)	(729)
Total non-operating income (expense), net	834	(10,948)	(149)	(20,490)
Loss before income taxes	(63,707)	(39,820)	(104,714)	(80,616)
Provision for (benefit from) income taxes	(170)	(4,310)	204	(5,143)
Net loss	$ (63,537)	$ (35,510)	$ (104,918)	$ (75,473)
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.20)	$ (0.12)	$ (0.32)	$ (0.25)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.20)	$ (0.12)	$ (0.32)	$ (0.25)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	325,197	308,263	324,574	307,115
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	325,197	308,263	324,574	307,115