Segment Information - Financial Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Total revenue	$ 129,561	$ 118,327	$ 392,323	$ 345,823
Cost of revenue	43,681	38,795	138,297	112,377
Sales and marketing	49,448	40,852	167,563	116,427
Amortization of purchased intangibles	920	488	2,742	1,237
Unallocated corporate expenses	84,026	58,971	266,669	163,768
Loss from operations	(48,514)	(20,779)	(182,948)	(47,986)
Corporate
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Cost of revenue	0	0	0	0
Sales and marketing	0	0	0	0
Amortization of purchased intangibles	0	0	0	0
Unallocated corporate expenses	84,026	58,971	266,669	163,768
Loss from operations	(84,026)	(58,971)	(266,669)	(163,768)
Business | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	120,101	109,204	364,612	317,879
Cost of revenue	42,392	37,057	134,229	106,932
Sales and marketing	42,826	34,640	148,370	96,758
Amortization of purchased intangibles	920	488	2,742	1,237
Unallocated corporate expenses	0	0	0	0
Loss from operations	33,963	37,019	79,271	112,952
Consumer | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	9,460	9,123	27,711	27,944
Cost of revenue	1,289	1,738	4,068	5,445
Sales and marketing	6,622	6,212	19,193	19,669
Amortization of purchased intangibles	0	0	0	0
Unallocated corporate expenses	0	0	0	0
Loss from operations	1,549	1,173	4,450	2,830
Hosted Services - Business
Segment Reporting Information [Line Items]
Total revenue	89,491	93,234	290,671	271,966
Hosted Services - Business | Corporate
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Hosted Services - Business | Business | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	89,491	93,234	290,671	271,966
Hosted Services - Business | Consumer | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Hosted Services - Consumer
Segment Reporting Information [Line Items]
Total revenue	9,460	9,123	27,711	27,944
Hosted Services - Consumer | Corporate
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Hosted Services - Consumer | Business | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Hosted Services - Consumer | Consumer | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	9,460	9,123	27,711	27,944
Professional Services
Segment Reporting Information [Line Items]
Total revenue	30,610	15,970	73,941	45,913
Professional Services | Corporate
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Professional Services | Business | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	30,610	15,970	73,941	45,913
Professional Services | Consumer | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	$ 0	$ 0	$ 0	$ 0