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Outline vs XWiki: catalog facts
Outline	XWiki
Freemium Hosted plans are paid. Self-hosting is possible under the source-available Business Source…	Free Free and open source under the LGPL-2.1 licence; professional support is available.
Web, Self-hosted	Self-hosted
Fast collaborative editor with slash commands and nested collections	Extension-based architecture for adding applications WYSIWYG editor with real-time collaboration
Source-available under the Business Source License, not open source The hosted plan is paid and self-hosting needs Postgres, Redis and object storage	Heavier to install and run than lightweight wikis Breadth of features takes time to learn
Self-hosted, Web application, Hosted service	Self-hosted
Closed source	Open source
License not stated	License: LGPL-2.1
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 October 2, 2026

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