Ask your own brain, and get an answer with citations

My Brain is a personal knowledge store you write to from the sources you already use, and read back by asking a question. Every answer cites the notes it came from, so you can check it rather than trust it.

What goes in

You capture directly (a typed note, a voice memo, a photo of a whiteboard), and you connect sources that keep capturing on their own. Web captures and connector imports arrive as proposals you accept or reject, so nothing from outside lands in your brain without you.

• Capture: type, speak, or photograph a note and it lands as a proposal.
• Connectors: Gmail, Google Drive and Calendar, Notion, Readwise, Slack, X, Hacker News and a topic-steered web search.
• Review: the queue of proposals waiting on you. Every web capture and connector import goes through it. Your own writes from the desktop app or the CLI land straight in.

What comes out

Ask a question and the answer is synthesized from your own notes, with numbered citations back to the files it used. When nothing in your brain answers the question, it says so instead of inventing one.

• Search across everything you have captured.
• Share a curated slice of your brain as an installable pack, and revoke it later. The ask box publishes a single cited answer the same way, as a link you can revoke.

Whose data it is

Yours. Answers run on a model key you supply, so the request goes to your provider on your key and your provider bills you for it. The notes themselves live in our hosted database, because the search that retrieves them runs on our servers. The details are in the Privacy Policy and at Your model key. You can export or delete everything at any time.

Getting started

Sign in and the first run walks you through your first capture. There is nothing to install: the desktop app is separate and optional, and My Brain works on its own.