Tool profile
GitBook: cost, fit and limits
GitBook is a documentation platform made by GitBook INC. with a block-based editor, Git Sync and auto-generated API docs, plus an AI Assistant for readers and an Agent that flags stale content, used by product, support and developer teams.
What to know first
GitBook has a free plan for one user, Essential at $65 a month per site plus $12 per user, Ultimate at $249 per site plus $12 per user, and a custom Enterprise tier, all assuming annual billing. Even Free includes Git Sync and an auto-generated MCP server. The privacy statement says data is stored in the United States and mentions GDPR, but not SOC 2.
GitBook at a glance
| Maker | GitBook INC., United States |
|---|---|
| Free plan | Yes |
| Entry price | $0 on Free, $65 per site per month plus $12 per user on Essential |
| API access | Yes |
| Category | Best AI API Documentation Tools in 2026, rank 5 of 11 |
| Website | gitbook.com |
Who GitBook is best for
Mixed product and API docs teams
One editor handles guides and auto-generated API docs, and Free includes Git Sync with GitHub or GitLab, so writers and engineers share a workspace.
Teams that watch reader behavior
AI Insights on Ultimate show where readers and agents get stuck, and content gap and broken link detection point writers at pages that need work.
Teams that share docs in chat tools
Ultimate adds channels for Slack, Linear and GitHub, and the pages list Claude, ChatGPT, Codex and Cursor among connected tools.
GitBook plans and pricing
| Plan | Price | What it includes |
|---|---|---|
| Free | $0 per month | One free user and 10 GitBook Agent messages per week; block editor, Git Sync with GitHub or GitLab, auto-generated API docs, preview deployments and an auto-generated MCP server. |
| Essential | $65 per month per site, plus $12 per user per month | Everything in Free plus the AI Assistant (Ask), team collaboration, custom domain, analytics and user feedback, site redirects and reusable content. |
| Ultimate | $249 per month per site, plus $12 per user per month | Everything in Essential plus AI Assistant (Chat), AI insights, GitBook Agent, adaptive content, authenticated access, site sections, Slack, Linear and GitHub channels and content gap detection. |
| Enterprise | Custom | Everything in Ultimate plus SAML SSO, a dedicated account manager, custom integrations, migration support, custom contracts and invoicing, and Git Sync IP allowlisting. |
Checked November 2026.
What GitBook does
- GitBook Agent
- Detects stale content and flags it for review on Ultimate. Free includes 10 agent messages a week, so a team can try the idea on a small space.
- AI Assistant
- Essential adds Ask, which lets readers question the docs, and Ultimate upgrades to Chat. Credits pause usage when exhausted, with packs from 5,000 credits for $47.50 up to 40,000 for $300.
- Git Sync
- Syncs a space with a GitHub or GitLab repository, and the pages show this on every plan, so docs can follow the same branches and reviews as code.
- Auto-generated API docs and MCP
- Generates API documentation and an MCP server from the content on the Free plan, so assistants can read the docs, and a GitBook MCP offers a programmatic interface to the platform.
- Authenticated access
- Ultimate adds authenticated access and adaptive content, so partner or customer-only pages can be shown to signed-in readers. Essential does not include it. Essential has no authenticated access, and Enterprise adds SAML SSO for the team.
How GitBook handles your data
GitBook's privacy statement says data is stored and processed in the United States and that subprocessors may store and process data outside the United States. Profile data is kept while the account is active or as needed, and a full profile is deleted within 90 days of account deletion, subject to legal requirements. Inactive accounts are not deleted automatically. The statement says GitBook is compliant with the GDPR, does not mention SOC 2 or ISO 27001, and says nothing we found about AI training.
Where GitBook falls short in practice
- Per-site plus per-user pricing. Essential is $65 a month per site plus $12 for every user, and Ultimate is $249 plus $12, with no user cap stated, so a large writing team on several sites pays quickly.
- AI is metered in credits. Usage pauses when credits run out. Packs run from 5,000 credits for $47.50 to 40,000 for $300, and Free allows only 10 agent messages a week.
- Feature gates by tier. The custom domain is missing from Free and authenticated access from Essential, so a private customer portal needs the $249 Ultimate plan for each site.
Works with
Alternatives to GitBook
GitBook: common questions
What does GitBook's free plan include?
Free is for individuals with one user. It includes AI-ready docs with an auto-generated MCP server, the block editor, Git Sync with GitHub or GitLab, auto-generated API docs, preview deployments and 10 GitBook Agent messages a week. The custom domain is not on Free.
How is GitBook priced for a team?
Essential is $65 a month per site plus $12 per user, and Ultimate is $249 a month per site plus $12 per user, assuming annual billing. A team of ten on one Essential site would pay $65 plus $120 a month before AI credit packs.
Which GitBook plan has the AI Assistant?
Essential includes the AI Assistant (Ask), and Ultimate includes AI Assistant (Chat), AI insights and the GitBook Agent. Free only gives 10 Agent messages per week. Credit packs start at 5,000 credits for $47.50 when included usage runs out. Ultimate costs $249 a month per site plus $12 per user.
Does GitBook state SOC 2 certification?
The privacy statement we read says GitBook is compliant with the GDPR, and it does not mention SOC 2 or ISO 27001. Buyers who need those attestations should ask for a current report, because the pages we opened do not show one.
Can GitBook docs be limited to signed-in readers?
Yes, on Ultimate. Authenticated access is listed there and not on Essential, together with adaptive content and site sections. Enterprise adds SAML SSO for the team itself, so check which sign-in method your readers will use before choosing. Authenticated access is not on Free or Essential.