Segment and geographic information - Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 515,657	$ 429,899	$ 276,327
Segment cost of revenue	236,024	209,253	143,510
Gross profit	279,633	220,646	132,817
Reconciliation of segment gross profit to gross profit
Amortization of capitalized software	9,300	6,900	4,900
Amortization of intangible assets	1,500
Depreciation	4,500	4,200	3,800
Stock-based compensation	34,680	31,618	8,963
Gross profit	279,633	220,646	132,817
Operating Segments
Segment Reporting Information [Line Items]
Revenue	515,657	429,899	276,327
Segment cost of revenue	223,326	201,323	137,575
Gross profit	292,331	228,576	138,752
Reconciliation of segment gross profit to gross profit
Gross profit	292,331	228,576	138,752
Segment Reconciling Items
Segment Reporting Information [Line Items]
Gross profit	12,698	7,930	5,935
Reconciliation of segment gross profit to gross profit
Amortization of capitalized software	9,293	6,894	4,909
Amortization of intangible assets	1,022	0	0
Depreciation	760	618	727
Stock-based compensation	1,623	418	299
Gross profit	12,698	7,930	5,935
Consumer | Operating Segments
Segment Reporting Information [Line Items]
Revenue	328,703	326,454	225,500
Segment cost of revenue	159,342	165,804	118,669
Gross profit	169,361	160,650	106,831
Reconciliation of segment gross profit to gross profit
Gross profit	169,361	160,650	106,831
Enterprise | Operating Segments
Segment Reporting Information [Line Items]
Revenue	186,954	103,445	50,827
Segment cost of revenue	63,984	35,519	18,906
Gross profit	122,970	67,926	31,921
Reconciliation of segment gross profit to gross profit
Gross profit	$ 122,970	$ 67,926	$ 31,921