Granite
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What is Granite?

A secure second brain and knowledge base: plain Markdown notes, encrypted, synced, and shared with the AI tools you choose.

Granite is a place for everything you know: meeting notes, plans, research, how-tos, and decisions. It works for one person keeping a second brain, and for a company building a shared knowledge base.

What makes it different

  • Plain Markdown files. Every note is a normal .md file. You can open it in any editor, export it at any time, and never get locked in.
  • Encrypted at rest. Each vault has its own encryption key. A deleted workspace has its key destroyed, so nothing it held can be read again.
  • Synced everywhere. Your notes reach your other devices within seconds, work offline, and keep a full version history.
  • Made for teams. Edit a note together live, comment, and give teams access to exactly the vaults and folders they need.
  • Ready for AI. Claude, ChatGPT, Cursor, and other tools can search your notes through Granite's MCP server, but only the vaults and folders you allow.

New here? Read How do I create an account and my first vault? next, and you'll be writing in two minutes.