Wiki.js

Overview

Wiki.js is an AGPL-licensed knowledge base for teams that want to write and share documentation on infrastructure they control. It is a strong fit for technical and internal documentation that needs flexible publishing and granular access rules, provided the team is prepared to operate a self-hosted service.

Its free price and broad authoring tools make it an appealing option for organizations comfortable with open-source software. The important caveat is that some capabilities belong to the 3.0 beta, whose requirements differ from those of the stable release.

Key features

Rich documentation authoring

The Markdown editor combines live preview with tables, tabsets, diagrams, math, and syntax highlighting for more than 180 languages. That range suits technical teams who need code examples and structured explanations alongside prose, rather than a basic text-only wiki.

Access and authentication

Authentication supports OIDC, LDAP, SAML 2.0, and local accounts. Administrators can grant, deny, or inherit permissions across groups and page rules, while custom-domain support and single sign-on help accommodate both public-facing and internal knowledge bases. These controls are useful for mixed audiences, though they require someone to design and maintain the permission structure.

Revision control and collaboration

Edits are diffed and attributed, and previous versions can be restored in one click. That makes review and recovery more practical than relying on manual backups. Real-time collaboration with live cursors, presence, and conflict-free merges is described for the 3.0 beta, not as a general stable-release capability.

Integrations, API, and content storage

Wiki.js lists more than 50 integrations spanning authentication, logging, rendering, search, and storage. Content can synchronize with Git or be pushed to local disk and cloud storage such as S3, Azure, and GCP. In 3.0 beta, every user-interface action is exposed through a REST endpoint documented with OpenAPI, a useful foundation for teams building connected workflows.

The stable release requires Node.js 18.x or later and supports PostgreSQL, MySQL, MariaDB, MSSQL, or SQLite3. The 3.0 beta runs on Node.js with PostgreSQL, so operators should confirm which release they intend to deploy before planning infrastructure.

Pricing

Wiki.js is free forever at no cost under the AGPL license, with self-hosting. There are no paid tiers described; the tradeoff is that the organization supplies and operates the hosting environment rather than paying for a hosted plan. The AGPL license should also be considered when evaluating how the software will be used or distributed.

Platforms

Wiki.js is available for web use and can be self-hosted on Linux, macOS, or Windows. Deployment can use Docker, Kubernetes, or bare metal. This gives infrastructure teams several ways to fit it into their environment, but it is not a turnkey hosted service.

Who it's for

Wiki.js is best for technical teams, organizations, and communities that want a free, self-hosted documentation platform with public or internal publishing, SSO, revision history, and control over content storage. It is less suitable for readers who want a managed service or do not want to take responsibility for application and database operations.

Pros and cons

• Pro: The Markdown editor covers diagrams, math, tables, tabsets, and more than 180 syntax-highlighted languages, which supports detailed technical documentation.
• Pro: OIDC, LDAP, SAML 2.0, local authentication, and inherited page and group rules offer a broad access-control toolkit.
• Pro: Git synchronization and local or cloud storage destinations give teams options for keeping content portable and integrated with existing workflows.
• Con: Self-hosting is required, so teams must provision and maintain the service and its database.
• Con: Real-time collaboration and the OpenAPI-described REST interface are identified as 3.0 beta capabilities; stable-release operators should not assume they are available there.
• Con: The stable release needs Node.js 18.x or later plus a supported database, adding operational dependencies for smaller teams.

Alternatives

CompassDocs is worth considering for teams seeking a similar self-hosted, AGPL community option with unlimited users and documents, or a cloud plan starting at 8.00 USD.

BookStack is another free, MIT-licensed self-hosted choice if its simpler no-cost-to-download-and-install model is a better fit.

KBPublisher may suit organizations that want a free on-premise community edition with unlimited staff users, end users, articles, and files.

XWiki offers a free on-premises community edition with community support that comes without guarantees.

Slite is a paid alternative for teams preferring a hosted product; its Basic plan costs $10 a month when billed yearly and includes unlimited docs and 5GB storage per user.

Happy HR, HRDocket Employee Self-Service, and Vivantio are also alternatives to compare.

Browse Knowledge base software, Knowledge Management Software, Wiki Software, and HR Knowledge Base Software for more options.

Verdict

Choose Wiki.js if you want a free, self-hosted knowledge base with capable Markdown authoring, flexible authentication, and control over revisions and storage. Look elsewhere if you need managed hosting or rely on real-time collaboration and API features without adopting the 3.0 beta.