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Outline vs Wiki.js: catalog facts
Outline	Wiki.js
Freemium Hosted plans are paid. Self-hosting is possible under the source-available Business Source…	Free The open-source software is available without a license fee. Hosting, hardware and…
Web, Self-hosted	Web, Self-hosted
Fast collaborative editor with slash commands and nested collections	Optional Git storage keeps every page as a plain file in a repository Many authentication providers and fine-grained page permissions
Source-available under the Business Source License, not open source The hosted plan is paid and self-hosting needs Postgres, Redis and object storage	Version 3 has been in development for years while 2.x remains the stable line
Self-hosted, Web application, Hosted service	Self-hosted, Web application
Closed source	Open source
License not stated	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.