Castr on new websites

1. Castr appeared on 2 new sites in the last 30 days.^[1]

The line is the 7-day average share of new sites that use Castr, since 10 September.

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	YouTube	1.8%	59.7%
2	–	Vimeo	1.0%	31.0%
3	–	MediaElement.js	0.2%	7.4%
4	–	Plyr	0.1%	3.4%
5	–	Wistia	0.1%	3.0%
6	–	Video.js	<0.1%	1.6%
7	–	Mux	<0.1%	1.1%
8	–	Cloudflare Stream	<0.1%	1.0%
9	▼2	Twitch	<0.1%	0.8%
10	–	Bunny Stream	<0.1%	0.7%
11	–	Matterport	<0.1%	0.7%
12	▲4	VTurb	<0.1%	0.7%
…
117	▼11	Castr	<0.1%	<0.1%

All-time shares across the new sites we track: of all of them, and of the sites using any Video tool. Among September launches it ranked #107 in Video, down from #96 in August. All 667 in Video

1 of the 10 sites using Castr are product launches we list individually. The other 9 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.

Site	Found	Also detected
PromptSyntax: every prompt deserves a receipt promptsyntax.org · Developer Tools	Aug 8

Watches, exports and the API give you all 10 sites using Castr, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.