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Segment and Geographic Information - Company's Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Revenue	$ 265,196	$ 191,476	$ 700,755	$ 537,202
Cost of revenue	93,587	74,489	249,515	212,206
Net loss	(92,725)	(107,754)	(287,783)	(325,367)
Reportable Segment
Segment Reporting Information [Line Items]
Revenue	265,196	191,476	700,755	537,202
Cost of revenue	90,872	70,421	241,353	203,988
Research and development expense	75,790	68,366	223,234	214,720
Sales and marketing expense	115,924	84,593	317,883	232,298
General and administrative expense	37,136	34,381	102,626	95,581
Other segment items	38,199	41,469	103,442	115,982
Net loss	$ (92,725)	$ (107,754)	$ (287,783)	$ (325,367)

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