Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Revenue	$ 1,151,708	$ 950,010	$ 720,203
Cost of revenue	205,612	174,462	148,416
Gross profit	946,096	775,548	571,787
Operating expenses
Sales and marketing	552,019	494,908	424,976
Research and development	312,987	300,571	270,982
General and administrative	217,513	195,746	166,283
Total operating expenses	1,082,519	991,225	862,241
Loss from operations	(136,423)	(215,677)	(290,454)
Interest income	23,694	19,779	5,826
Interest expense	1,899	1,957	2,135
Accretion income, net	13,583	9,794	2,035
Other expense, net	(3,136)	(360)	(1,737)
Loss before provision for income taxes	(104,181)	(188,421)	(286,465)
Provision for income taxes	1,775	1,273	466
Net loss	$ (105,956)	$ (189,694)	$ (286,931)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.72)	$ (1.34)	$ (2.10)
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.72)	$ (1.34)	$ (2.10)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	147,444,772	141,961,467	136,525,728
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	147,444,772	141,961,467	136,525,728
Other comprehensive (loss) income
Foreign currency translation adjustment, net of tax	$ (1,787)	$ 437	$ (1,355)
Unrealized income (loss) on available-for-sale debt and marketable securities, net of tax	425	504	(378)
Total other comprehensive (loss) income	(1,362)	941	(1,733)
Comprehensive loss	$ (107,318)	$ (188,753)	$ (288,664)