Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue	$ 276,284	$ 238,067	$ 167,261
Cost of revenue	71,923	70,442	51,764
Gross profit	204,361	167,625	115,497
Operating expenses:
Research and development	90,138	80,589	48,251
Sales and marketing	153,714	129,962	86,025
General and administrative	54,887	53,636	55,370
Restructuring and other related charges	8,142	0	0
Total operating expenses	306,881	264,187	189,646
Other income (expense), net	13,426	3,981	195
Worldwide pre-tax loss	(89,094)	(92,581)	(73,954)
Provision for (benefit from) income taxes	1,269	796	1,029
Net loss	$ (90,363)	$ (93,377)	$ (74,983)
Net loss per share attributable to Class A and Class B common stockholders:
Net loss per share attributable to Class A and Class B common stockholders, basic	$ (0.77)	$ (0.84)	$ (1.46)
Net loss per share attributable to Class A and Class B common stockholders, diluted	$ (0.77)	$ (0.84)	$ (1.46)
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders:
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic	116,938	111,437	51,360
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted	116,938	111,437	51,360
Net unrealized losses on marketable securities	$ 573	$ 754	$ 0
Comprehensive loss	$ (89,790)	$ (94,131)	$ (74,983)