Sigil is a multi-platform ebook editor. It is designed to edit books in ePub format.



The best free alternative to GitBook is Sigil, which is also Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to GitBook and loads of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to GitBook are BookStack, Nuclino, Foam and DokuWiki.
Sigil is a multi-platform ebook editor. It is designed to edit books in ePub format.



BookStack is a free and open source knowledge management platform built on PHP. The system has been built around simplicity to ensure that adding information to it is not a chore. The content structure is built on the metaphors of Books, Chapters & Pages.




BookStack is a knowledge base, it's dynamic. Gitbook is a static website generator for books and documentation.


Nuclino is a unified workspace where teams can bring all their knowledge, docs, and projects together in one place. It’s a modern, simple, and blazingly fast way to collaborate, without the chaos of files and folders, context switching, or silos.



Foam is a personal knowledge management and sharing system inspired by Roam Research, built on Visual Studio Code and GitHub.

DokuWiki is a standards compliant, simple to use Wiki, mainly aimed at creating documentation of any kind. It is targeted at developer teams, workgroups and small companies. It has a simple but powerful syntax which makes sure the datafiles remain readable outside the Wiki and...


Docusaurus is a project for easily building, deploying, and maintaining open source project websites.


its Open Source and not Freemium like gitbook with pay plans and limitations, is mainteined for Facebook inc, Opensource projects.

Write your content in the widely used and simple Markdown format, using the built-in visual editor. Unlike other wiki software that save content in a database with a difficult to extract format, Wiki.js saves all your content directly into Markdown (.


The Gitbook CLI application is no longer maintained, since they moved to a commercial solution. mdBook is a new and currently maintained implementation which is easy to install and is (for the most part) compatible with gitbook.


Designed for remote teams, it streamlines workflows by unifying documentation, discussion, and task execution. Features include a powerful editor, video explainers, sketch tools, integrations with Slack, Google Drive, project management tools, and advanced search capabilities.




MkDocs is static site generator that's geared towards building project documentation. Documentation source files are written in Markdown, and configured with a single YAML configuration file.

Read the Docs hosts documentation for the open source community. It supports Sphinx docs written with reStructuredText, and can pull from your Subversion, Bazaar, Git, and Mercurial repositories. The code is open source, and available on github.




Dropbox Paper is more than a doc—it’s a workspace that brings creation and coordination together in one place.




is not like gitbook,is more another php site generate for a online book if you're a writter.