Open-source Trainual alternatives

Outline is a knowledge base for teams, built with React and Node.js. It focuses on fast, collaborative writing: documents are edited together in realtime, stay compatible with Markdown, and are organized into collections so a growing team can find what it has written down.

The maintainers offer a hosted version at getoutline.com, and the repository contains the source that runs Outline and its associated services. If you only want to use Outline you do not need to run the code yourself, while teams that want their own copy can follow the documentation for a production configuration and use the published container images. Topics also mention a Slack integration.

The repository license is listed as 'Other', so review it before commercial redistribution. Outline suits teams looking for a wiki or internal documentation tool with a clean editor, as an alternative to products such as Confluence or Notion for company knowledge. The project does not accept AI-generated pull requests.

Wiki.js is a next-generation open-source wiki platform built on Node.js with a Vue front end. This repository contains the upcoming 3.0 release in beta, and the README is explicit that it is not for production use. The current stable 2.x release is published at js.wiki and in a separate repository.

The project is aimed at documentation and knowledge sharing for teams. Topics list Markdown editing, Git, cross-platform operation and documentation, and the beta is accompanied by installation requirements, a changelog and a feature request channel. Contributors can help with translations, and the project is supported by sponsors, patrons and donations from the community.

Wiki.js is AGPL-3.0 licensed. It is software you run on your own server, so it suits teams that want a self-hosted wiki they control. Anyone who needs a dependable wiki today should look at the 2.x stable version rather than this beta, and treat the 3.0 code as a preview of what is coming.

Docmost is a collaborative wiki and documentation tool, open source and presented as an alternative to Confluence and Notion with a focus on secure, on-premise use. Teams write and organize knowledge together in real time, and the project emphasizes that its self-hosted deployment fits organizations with strict compliance requirements.

Its feature list covers real-time collaboration, diagrams through Draw.io, Excalidraw and Mermaid, spaces for organizing content, permission management with groups, comments, page history, search, file attachments and embeds for tools such as Airtable, Loom and Miro. The interface is translated into more than ten languages. Topics mention an AI feature, real-time collaboration and drop-in migration from other wikis.

The Docmost core is licensed under AGPL-3.0, while enterprise features sit in specific directories under a separate enterprise license. You can follow the documentation to self-host it or try the cloud version. It suits teams looking for an internal knowledge base or documentation hub with a lighter footprint than Confluence.

BookStack is a platform for storing and organizing information and documentation, built with PHP and the Laravel framework. It is deliberately opinionated: the aim is a pleasant, intuitive experience out of the box where only basic word-processing skills are needed to create content, so non-technical colleagues can contribute.

Content is organized in a book metaphor, with shelves, books, chapters and pages. Advanced capabilities are available for those who want them, but the project says they should never get in the way of the simple core experience, and it is not intended as a general extensible platform for unrelated purposes. Development is relaxed and positive, evolving slowly while keeping upgrades stable and easy. There is a demo instance, installation instructions, documentation and a blog.

BookStack is licensed under MIT and is now managed on Codeberg, which is where the primary repository and issue list live. You host it on your own server with PHP and a database. It suits teams, schools and small organizations that want an approachable internal wiki rather than a highly configurable knowledge system.

Matterwiki is a deliberately simple wiki for teams. It was created for small companies that find full wiki software too complicated and that see knowledge getting lost in chat channels. Articles are filed under topics so content stays organized across departments, and the change history shows who edited which document and when.

The README suggests using it for documentation, notes, culture guidelines and employee onboarding content. It is a Node.js and React application. Setup requires Node version 7 or later and npm: you clone the repository, install dependencies, and edit the configuration file to set a secret phrase used to encode and decode access tokens.

The project is MIT licensed. The README carries a warning that some features may be broken while a stable 0.3.0 release is being prepared, with the master branch expected to work but a preview of the next version on separate branches. It suits people comfortable running their own Node application, and the project invites contributors to pick up issues.