Best Documentation As A Service & Tools in 2025

Modern Publishing, Simply taking your books from ideas to finished, polished books.

Key GitBook features:

User-Friendly Interface Collaborative Tools Integration with Git Customizable Templates

Open Source

Create in-app experiences with the most straightforward product adoption platform — quick implementation, lasting user engagement.

Key UserGuiding features:

User Onboarding Guides Hotspots Onboarding Checklists Knowledge Base

Try for free paid Free Trial $69.0 / Monthly (Basic; Guides & Checklists, Knowledge Base, In-app Surveys)

Easy to maintain open source documentation websites.

Key Docusaurus features:

Easy Setup Customizable React-Based Versioning

Open Source

Generate documentation from source code.

Key Doxygen features:

Comprehensive Documentation Automatic Code Parsing Customizable Output Integration with Other Tools

A collaborative developer hub for your API or code.

Key ReadMe features:

User-friendly Interface Interactive API Documentation Customizability Analytics

Project documentation with Markdown.

Key MkDocs features:

User-Friendly Static Site Generation Customizable Themes Built-in Search

Open Source

Archbee is a developer-focused product docs tool for your team. Build beautiful product documentation sites or internal wikis/knowledge bases to get your team and product knowledge in one place.

Key Archbee.io features:

CDN & Image Optimization on your custom domains Custom JavaScript Custom CSS Search Analytics for team and customer queries

freemium $30.0 / Monthly (5 users)

Swagger is an open source RESTapi Documentation Tool.

Key swagger.io features:

Comprehensive Documentation Interactive API Exploration Automated Code Generation Standardization

Open Source

An API documentation generator for JavaScript.

Key JSDoc features:

Improved Documentation Enhanced Code Understanding Autocomplete and Type Checking Consistency

Open Source

A documentation generator for TypeScript projects.

Key TypeDoc features:

TypeScript Support API Docs Generation Customization Markdown Support

Open Source

Spend your time on writing high quality documentation, not on the tools to make your documentation work.

Key ReadTheDocs features:

Ease of Use Automatic Builds Search Functionality Custom Themability

Create beautiful, intelligent, responsive API documentation.

Key Slate API Docs Generator features:

Clean and Modern Design Easy Setup Interactive Documentation Version Control

A documentation generation tool for API reference and Markdown files!

Key DocFX features:

Open Source Multi-platform Support Comprehensive Documentation Customization and Extensibility

Open Source

Gitbook alternative in Rust.

Key mdbook features:

Easy to Use Customization Lightweight and Fast Open Source