GitBook vs Nucleus
GitBook
gitbook.comNucleus
nucleus.aeSide by side
| Figure | GitBook | Nucleus |
|---|---|---|
| Price from | $65/mo | — |
| Free plan | Yes | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 4 | 0 |
| Spec score · AI Knowledge Base Software | 8.8 (#4) | 6.5 (#33) |
| Access control | Tiered roles and permissions control who can view and edit content. | The knowledge base page lists workspace-level, role-based permissions and document version tracking with a full audit trail. |
| Product | GitBook is a collaborative, AI-native documentation platform for creating, reviewing, and publishing branded documentation websites. | Nucleus describes itself as a knowledge infrastructure layer that lets users add information once and make it available across AI tools. |
| Support | GitBook provides product support through [email protected] and offers sales contact and demos. | For Enterprise, the terms list response targets of 1 hour for critical, 4 hours for high, 24 hours for medium, and 72 hours for low priority issues. |
Plans
In their own words
GitBook
GitBook is a documentation platform for teams creating, reviewing, and publishing branded documentation websites. Content can be written in a block-based visual editor or Markdown, organized through branch-based review, or synchronized with GitHub and GitLab. Published sites support custom domains, responsive layouts, SEO, preview deployments, and site variants. GitBook Agent can surface documentation gaps, draft updates, and review changes, while GitBook Assistant answers questions using documentation and connected sources. Teams can set tiered permissions and restrict documentation to authenticated users. The Free plan is free, includes one user, and limits GitBook Agent to 10 messages per week. Premium is $65 a month billed per site annually, plus $12 per user/month; Ultimate is $249 a month billed per site annually, plus $12 per user/month. Annual billing includes two months free, and a 14-day trial is available. Published documentation traffic is not limited.