The best open source alternative to Gitbook is Fumadocs. If that doesn't suit you, we've compiled a ranked list of other open source Gitbook alternatives to help you find a suitable replacement. Other interesting open source alternatives to Gitbook are: Vrite and xyd.
Gitbook alternatives are mainly Documentation & Knowledge Base Tools but may also be Collaborative Notes & Wikis or Technical Writing Platforms. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Gitbook.
A flexible Next.js framework for creating stunning documentation sites with MDX support, built-in search, and customizable components.

Fumadocs is a comprehensive documentation framework built specifically for Next.js that eliminates the need to rebuild documentation sites from scratch for every project. Trusted by creators of popular tools like Shadcn UI, Million.js, and Arktype, it provides all the essential building blocks you need to compose beautiful documentation sites.
Key features include:
The framework offers instant setup with a single command, allowing you to initialize, write content with type-safe validation, and deploy easily on Next.js-compatible hosting platforms. With beautiful syntax highlighting, full-text search capabilities, and a comprehensive component library, Fumadocs provides everything needed to create professional documentation sites that both developers and users will love.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
A powerful platform for technical writing, offering real-time collaboration, version control, and seamless integrations.

Vrite revolutionizes technical content creation with its innovative approach to collaborative writing. This powerful platform is designed to meet the unique needs of technical teams, offering a seamless blend of features that enhance productivity and quality.
Key benefits of Vrite include:
Vrite empowers technical teams to create, manage, and publish high-quality content more efficiently than ever before. Whether you're working on API documentation, technical guides, or product manuals, Vrite provides the tools you need to streamline your workflow and deliver exceptional results.
Create powerful, interactive documentation with hot reloading, TypeScript support, custom components, and built-in API docs generation.

xyd redefines the documentation experience by combining simplicity with powerful features that developers actually want to use. Built on five core principles, this platform delivers everything needed to create engaging, scalable documentation.
Developer Experience comes first with intuitive workflows, hot reloading, TypeScript support, and a powerful CLI that makes common tasks effortless. The familiar development environment ensures you can focus on content rather than fighting with tools.
Complete customization is possible through the modular architecture. Modify layouts, create specialized content types, add unique integrations, or build entirely new components to match your exact needs.
Rich, interactive content goes beyond static text with live code examples, dynamic components, and engaging elements that make documentation more effective and enjoyable to read.
Everything included for enterprise-scale documentation:
Open source foundation ensures accessibility and community-driven improvements, with a growing ecosystem of developers shaping the future of documentation together.