Segment and geographic information - Summary of Reconciliation from Total Segment Adjusted Gross Profit to Gross Profit and Net Loss Before Taxes (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]
Segment adjusted gross profit	$ 135,794	$ 130,403	$ 411,759	$ 386,998
Sales and marketing	(81,512)	(85,997)	(243,832)	(260,288)
Research and development	(25,581)	(32,976)	(76,900)	(96,607)
General and administrative	(21,937)	(22,266)	(68,776)	(74,299)
Restructuring charges	0	(11,275)	(1,578)	(11,275)
Total other income, net	2,911	5,051	10,039	5,002
Net income (loss) before taxes	2,749	(24,408)	9,313	(72,732)
Reportable Segment
Segment Reporting Information [Line Items]
Segment adjusted gross profit	135,794	130,403	411,759	386,998
Other costs of revenue	(6,926)	(7,348)	(21,399)	(22,263)
Sales and marketing	(81,512)	(85,997)	(243,832)	(260,288)
Research and development	(25,581)	(32,976)	(76,900)	(96,607)
General and administrative	(21,937)	(22,266)	(68,776)	(74,299)
Restructuring charges	0	(11,275)	(1,578)	(11,275)
Total other income, net	2,911	5,051	10,039	5,002
Net income (loss) before taxes	$ 2,749	$ (24,408)	$ 9,313	$ (72,732)