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