Granite is an encrypted second brain and AI knowledge base for individuals and teams. Write in plain Markdown with wikilinks, tags, backlinks and a graph view; everything is encrypted with a separate key for every vault, synced across phone, tablet, desktop and web, and available offline. A built-in MCP server (local and remote) lets Claude, ChatGPT, Cursor and other AI agents search, read and update your notes, only in the vaults you allow, with answers that cite the exact note and heading. Teams get live co-editing, comments and @mentions, shared vaults, publishing to the web, and on Business: SSO (SAML, OpenID Connect), SCIM, audit logs and security policies. Notes are never used to train AI. Free forever for one vault; Pro $3.99 per month; Business $14.99 per seat per month.
