Companies Using MediaWiki

I spent years around crawlers before we built TechnologyChecker, and wiki software is one of the few categories where the crawl argues with its own headline. Our October 2026 crawl finds MediaWiki serving the home page of 6,487 domains. A domain counts when the page carries MediaWiki's body class, its JavaScript configuration or a generator tag naming MediaWiki, and that test is clean: in a random sample of 260 live domains, every page that loaded was MediaWiki apart from five bot checks. The hard part is who sits behind each domain. 1,167 match a company, 18.0%, which is low for a business tool and normal for a wiki engine.

What the 6,487 is made of

Before reading any chart, I sorted the 6,611 live domains we analysed. 317 are Fandom wikis, each on its own fandom.com subdomain, and wiki.gg (32) and Miraheze (18) add more of the same shape. 177 are Wikimedia's own projects. Then come 402 domains that aren't anyone's wiki: 163 redirect to a Wikipedia or Wikimedia page, 28 serve a copy of Wikipedia, and 211 belong to two spam-wiki networks built from identical templates. That leaves about 5,665 domains, roughly 86%, that look like independent installs by companies, universities, agencies, communities and individuals.

Sales signal: strip out fandom.com, wiki.gg, miraheze.org and the Wikimedia domains before you build a prospect list. What's left is self-hosted, and those are the wikis that need outside help to upgrade.

A flat line once coverage settled

The chart reads 3,359 in June, 5,165 in July, 6,097 in August, 6,428 in September and 6,487 in October. Most of that climb is ours. The set of domains we crawl turns over every month as dead sites drop out and newly found ones come in, and our detection widened over the summer. October added 59 domains. On the other side, 432 domains dropped MediaWiki on at least one hostname since we began tracking it in March 2026, and an October re-check found 57 of them still running it on another hostname.

"MediaWiki barely grows and barely shrinks. A wiki gets installed for a project, fills up with pages, and then sits on a server for a decade." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker.io

Sales signal: this is a stable installed base, not a growth market. The opening is the age of what's installed, not new adoption.

Old wikis, old versions

mediawiki.org's Version lifecycle page lists three supported branches in October 2026: 1.43, the long-term release, until December 2027, 1.45 until December 2026 and 1.46 until July 2027. Everything else gets no security fixes. In our 260-domain sample, 183 pages stated a version in their generator tag, and 113 ran an unsupported release: 81 between 1.35 and 1.44, and 32 on 1.34 or older. Only 60 ran a supported branch; 10 ran Wikimedia's own build. Across the whole crawl, 1,163 domains expose a version of 1.34 or older through a legacy JavaScript variable that later releases dropped, so that figure counts the oldest installs directly rather than estimating them.

Named examples aren't hard to find. Hurricane Electric's FAQ wiki states MediaWiki 1.23.9, the São Paulo state planning department's clipping wiki 1.16.0, and BSH Home Appliances' wiki 1.39.3, a long-term branch that is now out of support.

"Six in ten MediaWiki installs that tell you their version run one nobody patches any more. For a security or hosting seller, that's the pitch." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker.io

Sales signal: upgrade work is the clearest service to sell. mediawiki.org's own example is that a wiki on 1.38 or earlier must stop at 1.39 or 1.43 before it can reach 1.46, so old installs need staged upgrades. That's billable work, and an opening for managed hosting, security reviews or a move to another platform.

Who runs it

59.04% of matched companies with a known size have 1 to 10 employees and 24.39% have 11 to 50. Only 29 have more than 1,000. Founding years point the same way as the versions: 36% in the 2010s, 27.41% in the 2000s and just 11.41% in the 2020s. The large names are usually one team's wiki. BSH Home Appliances runs its wiki on wiki.bsh-group.com, the City of Vienna its history wiki, Delaware's Department of Transportation a materials and research site, and Germany's Federal Waterways Engineering and Research Institute (BAW) a reference wiki.

Sales signal: the buyer owns one knowledge base, often in engineering, IT or documentation. At a large company, ask for the team that runs the wiki, not the web team.

Tech-heavy, and German

Software Development (11.12%), IT Services and IT Consulting (8.04%) and Technology, Information and Internet (6.65%) add up to 25.81% of matched companies, and non-profits and civic organisations add 8.84%. The country table has a tilt. The United States leads with 298 matched companies, but Germany has 174, and with Austria and Switzerland (21 each) German-speaking countries reach 216. Several German rows are product help wikis, such as Securepoint's wiki and RA-MICRO's online help.

Sales signal: for German-language documentation tools, translation services or MediaWiki consultancies, the DACH countries are a dense pocket, and a German MediaWiki owner is often a software vendor with a help wiki.

The stack around it

Across the 6,611 domains, Cloudflare fronts 41.76%, PHP shows on 31.75% and Google Analytics runs on 30.15%. Matomo is on 6.84%, another sign of owners who run their own servers. Hosting is fragmented: GoDaddy (4.19%), Namecheap (2.87%), DreamHost (1.98%) and OVHcloud (1.94%) lead a long list. Quantcast (3.18%) and comScore (3.09%) mostly come from Fandom; about seven in ten domains carrying them are fandom.com wikis.

Sales signal: no host owns this base, so a managed MediaWiki offer wins site by site. With Cloudflare already on 41.76%, a CDN won't be the selling point.

Against other wiki engines

The competitor table on this page pairs MediaWiki with documentation tools, not wikis: Docusaurus (6,424 domains), Postman API Documentation (6,366), GitBook (6,309) and Open Journal Systems (6,138). The wiki engines we track in the same category are smaller. DokuWiki is on 1,705 domains, Wiki.js on 745, BookStack on 405, Atlassian Confluence on 186 and XWiki on 73. Together that's 3,114, under half of MediaWiki's 6,487.

Sales signal: if you sell a newer wiki or knowledge base, MediaWiki's ageing installs are the largest pool of potential switchers in this category. Lead with the upgrade burden the version data shows.

Key takeaways

1. 6,487 domains, 3rd of 70 in Documentation & Knowledge Base, 63 ahead of Docusaurus.

2. About 86% of analysed domains look like independent installs. Fandom (317), Wikimedia (177) and 402 redirects, copies and spam wikis make up most of the rest.

3. 113 of the 183 sampled pages that stated a version run an unsupported release.

4. Small, established, tech-heavy companies: 59.04% have 1 to 10 staff and 25.81% work in software or IT.

5. Germany's 174 matched companies put it second only to the United States (298).

How to use this list

Drop the hosted farms and Wikimedia domains first, then filter by country and company size. For the full list of 6,487 MediaWiki domains with company and stack data, explore TechnologyChecker.io.