CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue	$ 1,296,745	$ 975,241	$ 656,426
Cost of revenue	307,005	232,610	147,134
Gross profit	989,740	742,631	509,292
Operating expenses:
Sales and marketing	599,117	465,762	328,065
Research and development	358,143	298,303	189,408
General and administrative	217,965	179,769	119,503
Total operating expenses	1,175,225	943,834	636,976
Loss from operations	(185,485)	(201,203)	(127,684)
Non-operating income (expense):
Interest income	68,167	14,877	1,970
Interest expense	(5,872)	(4,984)	(49,234)
Loss on extinguishment of debt	(50,300)	0	(72,234)
Other income (expense), net	(4,372)	577	(794)
Total non-operating income (expense), net	7,623	10,470	(120,292)
Loss before income taxes	(177,862)	(190,733)	(247,976)
Provision for income taxes	6,087	2,648	12,333
Net loss	$ (183,949)	$ (193,381)	$ (260,309)
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.55)	$ (0.59)	$ (0.83)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.55)	$ (0.59)	$ (0.83)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	333,656	326,332	312,321
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	333,656	326,332	312,321