Cal.com on new websites

1. Cal.com appeared on about 1,500 new sites in the last 30 days.^[1]
2. It is 4.5 times more common among product launches than among other new sites.
3. It is unusually common among marketing launches: 27%, against 8% across new sites.

The line is the 7-day average share of new sites that use Cal.com, day by day for the last 90 days and weekly before that (left of the dashed line). The shaded areas were measured against a different set of sites, so the line can step there without Cal.com itself changing.^[2][3]

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	Calendly	0.2%	35.4%
2	–	Cal.com	0.1%	20.8%
3	–	Acuity Scheduling	<0.1%	8.0%
4	–	Google Calendar	<0.1%	7.4%
5	–	Housecall Pro	<0.1%	4.0%

All-time shares across the new sites we track: of all of them, and of the sites using any Scheduling tool. All 1089 in Scheduling

Tool	Sites with both	vs all new sites	Bar
Vercel	2,083	2.9x

Tools that turn up far more often on Cal.com sites than on new sites in general, and how many times as common each one is there.

1,863 of the 5,545 sites using Cal.com are product launches we list individually. The other 3,682 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. They are included in the StackScope API and in Stackdar alerts.

Site	Found	Also detected
Dispatch Desk | AI Receptionist for the Trades usedispatchdesk.com · United States	Oct 19
Doric: AI agents for small law firms usedoric.com	Oct 19
Recordkite: Slack Connect conversations in Attio recordkite.com · United Kingdom	Oct 19
MindStar Growth — AI Front-Office Systems for Local Businesses mindstargrowth.com · Marketing · United States	Oct 19
AI Консалтинг и Разработка AI-Агентов | teracot teracot.com · AI	Oct 19
iZap izap.ai · Marketing · Brazil	Oct 19
Booky AI booky-ai.com · Productivity · United Kingdom	Oct 19
Turkart — India trip planner turkart.in · India	Oct 19
Consulting Interview Preparation by Seniors · The Shortlist theshortlistprep.com · Hiring & HR	Oct 18
Atomiz — AI products from prototype to production atomiztech.si · AI · Slovenia	Oct 18
Stock & Steel — Free Pokémon Card Vending Placement stockandsteelretail.com	Oct 18
Narrow Tools: managed cold email and sales calls for co-packers narrowtools.com · Marketing	Oct 18

Showing the most recent 12 of 1,863.

The StackScope API serves all 5,545 sites using Cal.com, filterable and exportable, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.
2. Grey: before 8 July 2026, we only tracked launches from launch platforms. From that date we crawl the wider web as well, so the share is measured against a much larger set of sites. For one continuous measure, view launch platforms only.
3. Amber: 8 July to 10 September 2026, before we improved our infrastructure to index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from 10 September. We record each site as it was when we found it.
4. Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. We count a country only where it is stated plainly enough to be sure: a governing-law clause or company registration number on a legal page, a phone country code, or a country domain ending. Sites that publish none are not counted at all.
5. Green hosting is the share whose web host The Green Web Foundation lists as running on green energy, among sites checked since 1 April 2026, against the same share for every new site we checked over that time. Data from The Green Web Foundation.