GitBook is a tool for building beautiful books using Git and Markdown. It can generate your book into multiple formats:
Cost / License
- Freemium
- Proprietary (Apache-2.0)
Application typeApplication types
Platforms
- Online
United States



Apps similar to Jigsaw (Tighten) include GitBook, which has a free version. Other options are Docusaurus, MkDocs, Archivy and VitePress. There's no shortage of Documentation Generators like Jigsaw (Tighten), with more than 25 alternatives for self-hosting, Linux, Mac, Windows and the web.
GitBook is a tool for building beautiful books using Git and Markdown. It can generate your book into multiple formats:



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


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.

Simple, powerful, and fast. Meet the modern SSG framework you've always wanted.





Sourcey builds modern static documentation sites directly from the source of your project. It turns Markdown guides, OpenAPI specs, MCP server specs, Doxygen XML, Go package docs, changelogs, examples, and other project context into fast, searchable HTML that you own.

The most powerful development environment – now adapted for writing documentation.


A documentation generator that builds HTML output based on Markdown files. Supports Markdown specs and offers a wide set of custom components using Markdown-like syntax. Builds Reference Source documentation for .NET projects (more added soon).

docsify generates your documentation website on the fly. Unlike GitBook, it does not generate static html files. Instead, it smartly loads and parses your Markdown files and displays them as website. All you need to do is create an index.

