Wikimedia Foundation (US 501c3) open-source wiki software powering Wikipedia.
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Ordered by feature parity and migration friction, which is weighted higher than feature breadth.
Figure 1Closest matches to MediaWiki
UK solo-dev MIT-licensed self-hosted wiki + documentation platform (Dan Brown, 2015); no SaaS, no vendor counterparty risk.
AGPLv3 open-source Node.js wiki by Nicolas Giard (Canada, 2016); 100M+ downloads; multiple DB backends; 40+ languages; self-host only.
US-incorporated open-source-style wiki (Outline, NYC) under BSL licence; self-hostable for EU sovereignty, but hosted cloud is US.
All 3 alternatives, benchmarked against MediaWiki.
UK solo-dev MIT-licensed self-hosted wiki + documentation platform (Dan Brown, 2015); no SaaS, no vendor counterparty risk.
AGPLv3 open-source Node.js wiki by Nicolas Giard (Canada, 2016); 100M+ downloads; multiple DB backends; 40+ languages; self-host only.
US-incorporated open-source-style wiki (Outline, NYC) under BSL licence; self-hostable for EU sovereignty, but hosted cloud is US.
Beyond compliance: how these alternatives compare on the capabilities you actually use day to day.
| Feature | BookStack | Wiki.js | Outline |
|---|---|---|---|
| Self-hostable | Yes | Yes | Yes |
| Real-time collaboration | No | No | Yes |
| Databases / tables | No | No | No |
| Public publishing | Yes | Yes | Yes |
| Version history | Yes | Yes | Yes |
| Granular permissions | Yes | Yes | Yes |
| Offline mode | No | No | No |
| AI assist | No | No | Yes |
Source: vendor documentation, as of Aug 2026.
Listed for transparency. Every product on this page is benchmarked against this baseline.
Listed for transparency. Every product on this page is benchmarked against this baseline.
Wikimedia Foundation (US 501c3) open-source wiki software powering Wikipedia.
For every product we read the public DPA, sub-processors document, hosting region declaration, and corporate ownership records. Each is timestamped. Signals are editorial, re-verified quarterly. We never accept self-attestation.
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