Blume

What is Blume?

Blume is a free, open-source docs framework built on Astro and Vite. Drop Markdown or MDX files into a folder and it ships a fast docs site with search, API references, and theming. It also prepares every page for AI agents through llms.txt files, Markdown mirrors, and an MCP server.

Top Features:

• Zero-config setup: routing and navigation are inferred straight from your folder of Markdown files.
• API references: generate reference pages from OpenAPI, AsyncAPI, and GraphQL schemas automatically.
• Agent-ready output: every page gets a Markdown twin, plus llms.txt and an MCP server.

Use Cases:

• Product docs: publish guides, quickstarts, and changelogs for an API or developer product.
• Platform migration: move existing docs off a paid hosted platform and run them yourself.
• Multilingual docs: fill in other languages with AI translation and keep separate versions per release.

Who Can Use Blume?

• Developers: spin up documentation for open-source libraries without writing any app code.
• Startups: ship polished product docs without paying monthly fees for a hosted platform.
• Developer relations teams: keep docs readable for both human visitors and AI coding agents.

Pricing

• Open source ($0): every feature under the MIT license, with unlimited editors, pages, and traffic.
• AI usage (provider rates): the assistant and narration cost only what your model provider charges.

Pros and Cons

Pros:

• No platform fees: there are no seats, credits, or usage caps to buy.
• Built for agents: llms.txt, Markdown mirrors, and MCP support help coding agents read docs.
• Fast pages: static HTML output with no client framework keeps sites quick and cheap.

Cons:

• Developer focused: setup uses a command line and Git, which may slow nontechnical writers.
• Self-hosted: you manage hosting, private access, and analytics with your own providers.
• Young project: it launched in mid 2026, so the ecosystem is still growing.

FAQs:

1) Is it really free?

Yes, it is MIT licensed with every feature included, and you only pay your host.

2) Which content sources can it read?

Markdown and MDX, plus Obsidian, Notion, Sanity, Contentful, Strapi, and GitHub Releases.

3) Does it include search?

Yes, local search needs no API keys, and adapters connect Algolia and others.

4) Can I migrate from Mintlify?

Yes, there is a migration guide, and one customer switched in an afternoon.

5) Does it have an AI assistant?

Yes, an in-page assistant answers questions from your docs using the model you pick.