Condensed Consolidated Statements of Operations and Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Revenue	$ 295,885	$ 247,907	$ 849,660	$ 689,969
Cost of revenue	54,954	44,125	148,778	126,631
Gross profit	240,931	203,782	700,882	563,338
Operating expenses
Sales and marketing	141,370	129,672	390,286	372,397
Research and development	80,791	72,708	223,698	225,960
General and administrative	55,267	51,753	157,077	143,324
Total operating expenses	277,428	254,133	771,061	741,681
Loss from operations	(36,497)	(50,351)	(70,179)	(178,343)
Interest income	5,962	4,721	17,714	14,612
Interest expense	(488)	(490)	(1,439)	(1,477)
Accretion income, net	3,816	2,952	10,665	6,615
Other income (expense), net	466	(486)	(26)	(1,009)
Loss before (benefit from) provision for income taxes	(26,741)	(43,654)	(43,265)	(159,602)
(Benefit from) provision for income taxes	(353)	193	400	573
Net loss	$ (26,388)	$ (43,847)	$ (43,665)	$ (160,175)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.18)	$ (0.31)	$ (0.30)	$ (1.13)
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.18)	$ (0.31)	$ (0.30)	$ (1.13)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	148,134,585	142,828,406	146,854,541	141,249,446
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	148,134,585	142,828,406	146,854,541	141,249,446
Other comprehensive income (loss)
Foreign currency translation adjustment, net of tax	$ 509	$ (565)	$ (64)	$ (186)
Unrealized gain on available-for-sale debt and marketable securities, net of tax	1,504	141	1,125	77
Total other comprehensive income (loss)	2,013	(424)	1,061	(109)
Comprehensive loss	$ (24,375)	$ (44,271)	$ (42,604)	$ (160,284)