GitBook

Modern documentation platform for teams to collaborate, write, and publish developer and API guides.

About GitBook

GitBook is a collaborative documentation platform designed to help teams capture and publish technical knowledge. While initially known for internal wikis and standard product manuals, GitBook has evolved to natively support API documentation, providing specific blocks and integrations for OpenAPI specifications and API endpoint design.

GitBook offers a WYSIWYG editor that feels similar to Notion, making it accessible to non-technical team members while maintaining a Git-sync functionality in the background for developers. It is highly favored by engineering teams who want a unified platform for internal engineering docs, public user manuals, and API references.

Key Features

Collaborative Editor: Notion-style block editor for easy, real-time collaboration.
Git Sync: Two-way sync with GitHub and GitLab to maintain docs-as-code workflows.
API Blocks: Native editor blocks for documenting HTTP requests, parameters, and responses.
OpenAPI Import: Generates API documentation pages directly from OpenAPI files.
Visitor Authentication: Secure public documentation with SSO for specific customers.
AI Lens: AI-powered search that answers questions based on the documentation content.

Pricing

Free Plan: $0 / month
Limited to 1 user only (no team collaboration).
Includes public publishing, basic customization, and preview deployments.
Note: Does not include custom domains (docs stay on gitbook.io).
Essential Plan: $65 / site / month (billed annually) + $12 / user / month
Includes $20 of AI credits (2,000 credits) per month.
Adds custom domains, custom logos/themes, AI Assistant "Ask," site analytics, and user feedback capabilities.
Ultimate Plan: $249 / site / month (billed annually) + $12 / user / month
Includes $100 of AI credits (10,000 credits) per month.
Adds the advanced AI Assistant Chat, GitBook Agent (for writing/editing docs), visitor authentication (Azure, Okta, etc.), adaptive content, and Slack/Linear integrations.
Enterprise Plan: Custom Pricing
Includes SAML SSO, dedicated account manager, white-glove migration, custom integrations, and custom contract/SLA terms.

AI Credit Add-ons

For teams that heavily utilize GitBook's AI search and drafting agents, they offer recurring AI credit packs:

5,000 credits: $47.50 / month
10,000 credits: $90 / month
15,000 credits: $127.50 / month
40,000 credits: $300 / month

Pricing last updated: November 3, 2026 at 12:00 AM

Use Cases

Writing public API documentation and tutorials
Maintaining internal engineering wikis
Collaborating on technical documentation across departments
Publishing secure, gated documentation for enterprise clients

Pros & Cons

Pros:

Very user-friendly, collaborative block editor
Excellent two-way Git synchronization
Unified platform for both internal knowledge and public docs

Cons:

API reference capabilities are less robust than dedicated OpenAPI tools (like ReadMe or Redocly)
UI customization options are somewhat limited

Integrations

GitHub, GitLab, Slack, Linear, OpenAPI, Jira

FAQ

Does GitBook support API documentation?

Yes, GitBook includes specific 'Method blocks' designed to format HTTP methods, endpoints, parameters, and code examples cleanly.

Can I import an OpenAPI specification?

Yes, GitBook allows you to import OpenAPI files to automatically generate API endpoint blocks within your documentation.

What is GitBook's Git Sync?

Git Sync provides a two-way synchronization between GitBook and GitHub/GitLab. Edits made in the GitBook UI generate commits in Git, and Markdown commits in Git update the GitBook UI.