GitBook vs Stack Internal
GitBook
gitbook.com
Stack Internal
stackoverflow.coSide by side
| Figure | GitBook | Stack Internal |
|---|---|---|
| Price from | $65/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 4 | 3 |
| Spec score · Knowledge base software | 9.1 (#5) | 8.7 (#23) |
| Spec score · AI Knowledge Base Software | 8.8 (#4) | 8.0 (#20) |
| AI access | GitBook publishes llms.txt, llms-full.txt, Markdown versions, and an MCP connection for compatible AI tools and coding agents. | Its MCP server connects AI assistants and coding agents, including Claude and Cursor, to Stack Internal knowledge. |
| Data protection | GitBook states that customer data is encrypted at rest and in transit and stored in U.S. data centers, with some cached assets served through a CDN. | The service requires HTTPS, encrypts data in transit and at rest, uses SQL Transparent Data Encryption and AES-256, and says customer data is not used to train models. |
| Free plan | Yes | Yes |
| Integrations | Built-in integrations include GitHub, GitLab, Slack, Intercom, analytics services, authentication providers, feature-flag tools, and support tools. | Listed integrations include ChatGPT, Claude Code, Confluence, Cursor, Gemini, GitHub, Jira, Notion, OpenAI, ServiceNow, Slack, Microsoft Teams and Google Docs. |
| Security certifications | GitBook states that it is SOC 2, ISO 27001, and GDPR compliant. | Business and Enterprise plans have SOC 2 Type II reports; Enterprise is ISO 27001 and ISO 27701 certified, with GDPR and SCC coverage stated. |
| SSO support | Yes | Yes |
| Support | GitBook provides product support through [email protected] and offers sales contact and demos. | Starter includes standard self-service support, while Organization includes dedicated enterprise account management. |
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.
Stack Internal
Stack Internal is a cloud knowledge product that delivers verified information to people, teams, and AI agents. It captures and synthesizes material from AI tools, chat threads, and wikis into knowledge units carrying authorship, recency, usage, provenance, and conflict signals. Teams arrange content in spaces and assign permissions to people, teams, and agents. Listed connectors cover Google Docs, Slack, Microsoft Teams, and Stack Internal Community, with an ingestion API for other tools. An MCP server connects AI assistants and coding agents, including Claude and Cursor, to the stored knowledge. AI search or answers and single sign-on are supported. The Free plan costs nothing for up to 50 teammates. Starter is also free, with up to three collaborators, 1,000 credits monthly, four connectors, a custom ingestion API, and unlimited ingestion. Organization pricing is based on required Knowledge Flow Credits and requires contacting sales. Security listings include ISO 27001/27701, SOC 2 Type II, SCIM, GDPR and SCC.