GitBook ranks #2 in Documentation & Developer Portals AI search.

GitBook is a cloud-based documentation and knowledge management platform designed for technical teams. Founded in 2014 and used by more than two million people across over 30,000 teams—including Zoom, FedEx, Nvidia, Snyk, and Google—GitBook enables organizations to create, publish, and maintain product documentation, API references, help centers, and internal knowledge bases from a single platform. Its WYSIWYG block editor syncs bidirectionally with GitHub and GitLab, supporting both visual and code-based editing workflows. GitBook's AI layer includes an embeddable GitBook Assistant, a proactive GitBook Agent for suggesting doc improvements, and a built-in MCP server that makes documentation natively discoverable by LLM agents. The platform is SOC 2 and ISO 27001 certified, supports SAML SSO, and offers enterprise access controls.