Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue	$ 728,937	$ 629,097	$ 515,657
Cost of revenue	309,598	275,320	236,024
Gross profit	419,339	353,777	279,633
Operating expenses
Sales and marketing	316,738	301,347	227,023
Research and development	120,335	104,556	66,107
General and administrative	93,898	99,064	64,410
Restructuring charges	10,263	0	0
Total operating expenses	541,234	504,967	357,540
Loss from operations	(121,895)	(151,190)	(77,907)
Other income (expense)
Interest income	20,670	5,548	204
Interest expense	(518)	(1,251)	(220)
Other expense, net	(1,898)	(4,696)	(920)
Total other income (expense), net	18,254	(399)	(936)
Net loss before taxes	(103,641)	(151,589)	(78,843)
Income tax provision	(3,653)	(2,286)	(1,183)
Net loss attributable to common stockholders	(107,294)	(153,875)	(80,026)
Net loss attributable to common stockholders	$ (107,294)	$ (153,875)	$ (80,026)
Net loss per share attributable to common stockholders
Basic (in dollars per share)	$ (0.71)	$ (1.09)	$ (1.46)
Diluted (in dollars per share)	$ (0.71)	$ (1.09)	$ (1.46)
Weighted-average shares used in computing net loss per share attributable to common stockholders
Basic (in shares)	150,098,776	140,873,504	54,972,827
Diluted (in shares)	150,098,776	140,873,504	54,972,827