GitBook

GitBook is a platform for creating, publishing, and maintaining technical documentation, including product docs, API references, changelogs, and internal knowledge bases. The core problem it addresses is documentation drift: when a product changes, its docs rarely change with it, and outdated pages then produce wrong answers for both human readers and AI agents that consume them. GitBook positions itself not just as a writing tool but as a system for keeping published documentation accurate over time.

The product combines a block-based visual editor with docs-as-code workflows. Teams can sync content with GitHub or GitLab and treat documentation changes like pull requests, with branching, review, and merging. On top of that, GitBook adds an AI layer: an assistant that answers reader questions directly from the docs, AI insights that reveal where users get stuck, and a quality-monitoring feature that flags content that no longer matches the product. Every published site also automatically generates an MCP server, a Markdown version of each page, and an llms.txt index so AI coding agents such as Claude, ChatGPT, and Cursor can read the documentation reliably.