How to share a private brain by email

A private brain is yours alone by default. With KBrain Pro you can open it to a few specific people: a client, a colleague, a contractor. You invite them by email, they accept, and from then on they can ask the brain questions from their own AI assistant. Nobody else can add it.

Share a brain in four steps

• Go to My Brains, open the private brain you want to share and click Edit.
• In Share privately, type the person's email address. Add a short personal note if you like, so they know why they are getting it.
• Click Send invite. KBrain emails them from no-reply@kbrain.io with an Accept invite button.
• They sign in to KBrain with that address and click Add to my connections. The brain is now available in Claude, ChatGPT or any MCP client they have connected to KBrain.

What the people you invite get

• They can ask the brain questions from their AI assistant, with answers grounded in your sources.
• They see the brain's name, description and sample questions.
• Their assistant can read the text of the brain's files, so only share content you are happy for them to read.
• They cannot edit the brain, download your original files, or share it with anyone else.
• Their questions count toward their own KBrain plan: 300 MCP calls a month on Free, unlimited on Pro.

Who can accept an invite

Only the address you invited. The invite link works once, expires after 14 days, and only for someone signed in with that email address, so a forwarded email is not enough to get in. People without a KBrain account create one simply by signing in with the invited address. KBrain never tells you whether an address already had an account.

Managing access

• Invited means the email went out and is waiting to be accepted. You can resend it once a day.
• Has access means the person accepted. Revoke removes the brain from their assistant on their next question.
• If you cancel Pro, sharing is paused rather than deleted, and comes back when you upgrade again.
• If you make the brain public or share it with your organization, email sharing stops, since the brain is no longer private.
• On Business and Enterprise, the organization owner can turn sharing by email off for the whole organization. Existing shares are paused while it is off.