Open-source Confluence alternatives

AppFlowy is an open-source workspace that brings documents, wikis, project and task management and team collaboration into one app. It is presented as an alternative to Notion, and its topics also tag it as a Confluence alternative, with the emphasis on keeping control of your own data.

The client is built with Flutter and a Rust core, giving apps for macOS, Windows and Linux plus iOS and Android versions. Desktop builds can be downloaded directly or from channels such as Flathub and Snapcraft. AI features are part of the workspace, and a public roadmap and active forum let users propose features. Translations are contributed through JSON files and tools such as inlang.

The project is AGPL-3.0 licensed and has documentation for self-hosting the server side, so organizations can keep content on their own infrastructure. A hosted version is available through appflowy.com for people who do not want to run servers. It suits teams looking for a Notion-style workspace with a privacy-first stance.

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.

MediaWiki is free, open-source wiki software written in PHP. It was created for and still runs Wikipedia and the other Wikimedia projects, which gives it a long record at very large scale. Anyone can install it to host a knowledge base, documentation site or community encyclopedia.

The README describes it as extensible, with hundreds of extensions for both the on-wiki experience and the back end, and as scalable enough for small and large sites alike. It is simple to install on most hardware and software combinations and is localized in more than 350 languages, with a large community of third-party users and developers around it. System requirements and installation steps are documented on the project site.

The GitHub repository is a mirror of the code reviewed on Wikimedia's Gerrit server, and contributors are directed to the developer access page. MediaWiki is released under the GNU General Public License, which GitHub reports as 'Other'. You host it yourself, or use one of the many third-party wiki hosting providers.

DokuWiki is an open-source wiki engine written in PHP. It is commonly used for documentation, internal knowledge bases and project wikis, and is known for storing pages as plain text files rather than requiring a separate database, which keeps installation and backups simple.

The homepage could not be fetched when this entry was prepared, so the details here come from the repository description, topics and widely known project traits. The project is licensed under GPL-2.0, publishes dated releases and is extended with plugins and templates maintained by its community.

MrDoc is an online document and knowledge management system you host yourself. It covers capturing and storing content, organizing it into collections, AI-assisted question answering, writing, and sharing, so individuals and small teams can keep personal notes, internal wikis, product documentation, and tutorials in one place. Its own description compares it to a self-hosted Yuque or an online-editable GitBook.

Content is written in Markdown, and the project provides several ways in: the web application, browser extensions for web clipping and quick notes, desktop clients for Windows, macOS, and Linux, a mobile client for Android, and an Obsidian plugin for two-way sync. The web app comes in an open-source edition and a professional edition, so some features are reserved for the paid tier.

MrDoc is written in Python with the Django framework and released under the GPL-3.0 license, with documentation in both Chinese and English and a demo site. It suits teams that want full ownership of their knowledge base data and a simple self-hosted alternative to cloud documentation tools.

Alexandrie is an open-source, self-hosted wiki and knowledge management platform for individuals and teams. It combines an extended Markdown editor with offline support, collaboration tools, and fine-grained permissions, and is pitched as an alternative to Notion, Obsidian, and Confluence. It is released under the MIT license.

The Markdown engine supports LaTeX, custom containers, interactive checkboxes, frames, snippets, and integrated diagrams. Content is organized in a multi-tenant structure of teams, workspaces, categories, and nested documents. It works as an offline-first progressive web app that can be installed on devices, and it supports OIDC single sign-on and local S3 backups. The topics also mention kanban boards.

The whole stack comes up with one Docker command. It uses a Go backend and a Nuxt and Vue front end. Alexandrie suits teams and individuals who want a private knowledge base with enterprise-style permissions and who prefer to keep their notes on their own infrastructure.

Gollum is a wiki system built on top of Git. A Gollum wiki is simply a Git repository of text or markup files that humans can edit, organized into directories however you like, and it can also hold images, PDFs and page headers and footers. Pages can be written in a variety of markups and edited with your own editor or with the built-in web interface.

Because it is Git, every page keeps its history, can be displayed in all versions and can be reverted. Gollum aims to stay compatible with GitHub and GitLab wikis, so you can clone one of those wikis and view or edit it locally. Advanced features include diagrams with Mermaid or PlantUML, BibTeX and citation support, annotations with CriticMarkup, mathematics via KaTeX or MathJax, macros, redirects and an RSS feed of recent changes.

It is written in Ruby and released under the MIT license. It runs on Unix-like systems and Windows using either standard Ruby or JRuby, though on Windows only JRuby is supported. You can install it as a Ruby gem, run it with Docker or deploy it as a Java web application resource. It also supports Rack, authentication servers and running as a service.