This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
Granite
Encrypted second brain your AI tools can actually use
Granite is a Markdown second brain, encrypted with a separate key for every vault and synced across phone, tablet, desktop and web. A built-in MCP server lets Claude, ChatGPT and Cursor search, read and update your notes, only in the vaults you allow, with answers that cite the exact note. Wikilinks, backlinks, graph, offline search, live co-editing, and SSO, SCIM and audit logs for teams. Never used to train AI. Free forever; Pro $3.99/mo, no AI surcharge.
Hi Product Hunt, Julian here 👋
I wanted my notes to be useful to the AI tools I use every day, without pasting my life into a chat window or handing my notes to a company that trains on them.
Granite is the result: plain Markdown, encrypted with a separate key per vault, synced everywhere and fast offline. Its built-in MCP server lets Claude, ChatGPT or Cursor search and cite your notes, but only in the vaults you choose, and you can disconnect any app in one click.
It also works as a company brain, with live co-editing, comments, SSO and audit logs. Happy to answer anything about the security model, and I'd love to hear how you'd use your second brain with AI.
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About Granite on Product Hunt
“Encrypted second brain your AI tools can actually use”
Granite was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #174 on the daily leaderboard. Granite is a Markdown second brain, encrypted with a separate key for every vault and synced across phone, tablet, desktop and web. A built-in MCP server lets Claude, ChatGPT and Cursor search, read and update your notes, only in the vaults you allow, with answers that cite the exact note. Wikilinks, backlinks, graph, offline search, live co-editing, and SSO, SCIM and audit logs for teams. Never used to train AI. Free forever; Pro $3.99/mo, no AI surcharge.
Granite was featured in Android (57.7k followers), Notes (8.4k followers), Privacy (11.4k followers) and Artificial Intelligence (481.7k followers) on Product Hunt. Together, these topics include over 196.6k products, making this a competitive space to launch in.
Who hunted Granite?
Granite was hunted by Julian Lewis. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Granite stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Julian Lewis