Companies Using MkDocs

MkDocs is free, so this page counts documentation sites, not customers. A domain counts when a page's generator meta tag starts with "mkdocs-" and a version number, and that detail matters more than it sounds. Material for MkDocs, a third-party theme, writes the tag on every page. MkDocs' built-in themes don't, and mkdocs.org, which uses one of them, carries no tag at all. So our October 2026 count of 2,405 domains is in practice a count of Material for MkDocs sites. I opened 40 random domains from it: 38 loaded, and all 38 ran Material. Of the other two, one forwarded to a lander page and one sat behind a bot check.

Docs hosts, not company sites

1,025 of the 2,427 live domains (42.2%) carry MkDocs on a docs. or doc. hostname, close to the 45.1% that Docusaurus' profile reports. 117 more use a help. or support. host and 66 a wiki. host, and several hundred run it on the bare domain, often for an open-source project or a personal site. The 1,091 domains we matched to a company are mostly small software firms: 57.08% of those with a known size have 1 to 10 staff, and Software Development, IT Services and Technology, Information and Internet add up to 53.16%. The bigger names run it on one documentation property: SailPoint, DataRobot, Percona, Matillion, Jitterbit and KX.

Sales signal: treat each row as a docs team's site, not a company website. The buyer is a technical writer or a developer-experience lead, and the docs hostname tells you which product they document.

Version 1.6.1 almost everywhere

The usage chart reads 1,080 domains in June 2026 and 2,405 in October, but that rise isn't adoption: the set of domains we crawl turns over every month, with dead sites dropping out and new ones added, and our crawl covered more of the web while our detection widened. The version tag is more telling. Of 2,373 live domains with a reading, 1,913 (80.6%) run a 1.6 release and 1,783 (75.1%) run 1.6.1, published on PyPI on 30 August 2024 and still the latest release when I checked on 13 October 2026. 185 run 1.5 and 275 something older, 10 of them pre-1.0. The Material team wrote in November 2025 that MkDocs had been unmaintained since August 2024, and its post on MkDocs 2.0 says the planned rewrite, still in pre-release, drops plugins, moves configuration to TOML and won't run Material.

"Three in four MkDocs sites we can read run the same release, 1.6.1, and it's more than two years old. That's an installed base waiting for a decision." - Sophie Clarke, Product Marketing Manager at TechnologyChecker.io

Sales signal: every team on this list has to choose between an unmaintained 1.x, a breaking 2.0, Zensical or another generator. Migration services and hosted docs platforms have a dated reason to call.

Material in maintenance mode

Material for MkDocs entered maintenance mode with version 9.7.0 in November 2025: critical bugs and security issues get fixed for at least 12 months, and no features are added. The same release made the paid Insiders features free, and the team now builds Zensical, an MIT-licence generator that reads mkdocs.yml. In my random sample, 16 of the 38 Material sites were on 9.7 and 22 on older lines, two still on 7.x. Insiders builds still show on DataRobot's, KX's and Jitterbit's docs and on 2 of the 38 random sites, although the Insiders repository was due to be deleted on 1 May 2026.

Sales signal: sites still running an Insiders build belonged to paying sponsors. They've shown they will pay for documentation tooling, which makes them the best first calls for a supported alternative.

Where the leavers went

Since we began tracking MkDocs on 16 March 2026, 147 domains have dropped it from a hostname. 12 still run it on another one, so 135 left entirely. I opened 30 of those 135. 12 now carry Zensical's generator tag, among them msys2.org, concourse-ci.org, docs.hyva.io and docs.pgedge.com. Five build with ProperDocs, a fork of MkDocs 1.x first published in March 2026 whose tag our MkDocs rule doesn't match, so they're still MkDocs sites in all but name. Two moved to Astro and two to Hugo, one still runs MkDocs, and the other eight are gone, forward elsewhere or show no generator.

"Zensical took 12 of the 30 MkDocs leavers I opened. None of them went to Docusaurus or GitBook." - Sophie Clarke, Product Marketing Manager at TechnologyChecker.io

Sales signal: so far, MkDocs churn looks like an upgrade path inside the Material ecosystem, not losses to rivals. Docusaurus and GitBook sellers should pitch on the cost of MkDocs 2.0's breaking changes, not on features.

The rival table

MkDocs is 11th of 70 tools in Documentation & Knowledge Base with 1.29%. Docusaurus (6,424 domains) is the like-for-like rival. GitBook (6,309) is hosted, MediaWiki (6,487) runs wikis and Swagger UI (3,094) renders API references. Overlaps are small: 11 domains run MkDocs and Docusaurus today, 5 GitBook, 4 MediaWiki and 26 Swagger UI, and none of these pairs passes our switching tests.

Sales signal: the 26 domains that also run Swagger UI publish both written guides and an API reference. They're the warmest list for an API documentation platform.

The stack around it

These percentages are of the 2,427 live domains. GitHub Pages is on 38.15%, and Fastly shows on 38.11% because GitHub Pages serves through Fastly. Amazon Web Services (18.09%), Vercel (5.77%) and Netlify (5.6%) follow, and Cloudflare fronts 47.42%. jsDelivr (20.89%), cdnjs (15.57%) and unpkg (11.87%) supply scripts. Google Analytics is on 46.85%, Cloudflare Browser Insights on 18.79% and Plausible on 3.42%.

Sales signal: these sites build in CI and deploy static files to free hosting. Paid hosting, search or analytics has to beat a price of zero, so sell what the free stack can't do.

Key takeaways

1. 2,405 domains, 11th of 70, and in practice a count of Material for MkDocs sites.

2. 75.1% of readable domains run MkDocs 1.6.1, the August 2024 release.

3. 86.8% of matched companies with a known size have 50 or fewer staff.

4. 12 of the 30 leavers I opened moved to Zensical, and 5 to ProperDocs.

5. GitHub Pages is on 38.15% of live domains.

How to use this list

Filter by docs hostname and company size, then check each site's generator tag before you pitch: a site on Material 9.7 is a different conversation from one on 7.x. For the full list of 2,405 MkDocs domains with company, size and stack data, explore TechnologyChecker.io.