0docs vs Documentation.AI

0docs is a free, open-source documentation platform that teams can self-host to create, style, version, and publish documentation. Its MIT-licensed editor arranges content into pages, sections, and blocks such as callouts, steps, code tabs, cards, accordions, and API endpoints. Users can change colors, fonts, sidebar presentation, and individual block styles, then publish documentation snapshots using a custom domain. The “Ask docs” feature answers questions from published documentation and requires an OpenAI API key; an OpenAI-compatible base URL override is documented. AI clients can use a built-in MCP endpoint to read and edit documentation with project tokens or anonymous read-only access. The platform requires PostgreSQL, storing uploaded media there by default or in optional S3-compatible storage. Local installation calls for Node.js 20+ and pnpm, plus Docker Compose or PostgreSQL 14+. The default upload maximum is 20 MB per upload. SMTP is optional, but without it password-reset and invitation links appear in server logs. The self-hosting guide recommends HTTPS, database backups, and production configuration.

Documentation.AI combines an AI documentation agent, review workflows, publishing, and AI access for technical documentation. Teams can write in a visual web editor or use Markdown and MDX in Git repositories with pull-request previews. OpenAPI specifications generate API reference pages with request and response examples plus a live playground. Agent and workflow changes arrive as drafts or commits for review instead of publishing automatically. The platform includes an in-document assistant with cited answers, a Reader MCP server, and generated llms.txt. GitHub, GitLab, Jira, and Confluence can supply context, while analytics and chat integrations include Google Analytics 4, PostHog, Intercom, and Crisp. Documentation may be public, password-protected, or private with JWT or OAuth 2.0; SAML/OIDC SSO and SCIM are Enterprise features. AI work pauses when credits run out until the next cycle or a top-up, with no overage billing stated. Starter is free; Standard costs $55 a month billed yearly, and Pro costs $159 a month billed yearly.