Read the Docs Sphinx Theme on new websites

1. Read the Docs Sphinx Theme appeared on 6 new sites in the last 30 days.^[1]

The line is the 7-day average share of new sites that use Read the Docs Sphinx Theme, since 15 September. It starts at our first detection.

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	Starlight	<0.1%	66.6%
2	–	Mintlify	<0.1%	12.0%
3	–	mdBook	<0.1%	4.5%
4	–	Redocly	<0.1%	3.4%
5	▲2	MDN Web Docs	<0.1%	1.8%
6	▼5	Read the Docs Sphinx Theme	<0.1%	1.7%

All-time shares across the new sites we track: of all of them, and of the sites using any Documentation tool. Among September launches it ranked #10 in Documentation, down from #5 in August. All 32 in Documentation

2 of the 19 sites using Read the Docs Sphinx Theme are product launches we list individually. The other 17 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
qc: A tool for qualitative data analysis designed to support computational thinking — Qualitative Coding 1.7.8 documentation qualitativecoding.net	Aug 23
krypteia — Cryptography Workspace — krypteia — Cryptography Workspace krypteia-rs.dev	Aug 2

Watches, exports and the API give you all 19 sites using Read the Docs Sphinx Theme, from £15 a month.

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