MemoryBrain
Did I say it, read it, or did the AI make it up?
An AI memory with sources answers that question. Every memory keeps where it came from: something you read, one of your chats, or something you said. If it comes from something you read, it also keeps the author's original wording. Your own opinion is kept apart. MemoryBrain is a memory like that: it is yours, it works inside ChatGPT and Claude, and it is the same in both.
How it differs from ChatGPT's or Claude's memory
Each assistant's built-in memory is useful and free. MemoryBrain does not replace it; it works alongside it. This is what changes:
| Each assistant's memory | MemoryBrain | |
|---|---|---|
| Where it lives | Inside that assistant | Outside, in your MemoryBrain account |
| Across assistants | Each one on its own | The same in ChatGPT and Claude |
| Which memories it used in an answer | ChatGPT shows them with the Sources icon (since May 2026). Claude links the chats when it searches them | The AI tells you which note it used and opens it |
| Where each saved memory came from | Not shown in the memory list, and deleting the chat does not delete the memory | Every note keeps its source |
| What you read outside the chat | Not kept with its author or quote | Ideas one by one, with the author and the original wording. Your Kindle highlights too |
| Your opinion vs the author's | Mixed | Kept in separate fields |
| Taking it with you | Depends on the assistant | Download everything in one file |
| Installing anything | No | No: you add it with a URL |
| Price | Included | Private beta, no published price |
When you don't need it: if you use a single assistant and only need it to remember a handful of preferences, its built-in memory already does that.
What about Notion, Hjarni and the rest?
Other memories also work across ChatGPT and Claude through MCP. Notion launched one on November 4, 2026, including its free plan, and Hjarni is a hosted Markdown notes app with a connector (MemoryBrain vs Hjarni). If what you want is for your assistants to share what they learn about you, any of them will do.
What MemoryBrain does that those don't is start from what you read: give it an article, a book, your highlights or your chats, and it pulls out the ideas one by one with the original wording and the author, and keeps your own take apart.
Why the original wording matters
A memory without sources mixes what you said, what you read and what the AI inferred. With the source and the original wording:
- You can ask "where did you get that?" and get an answer you can check.
- When writing in your voice, the AI can check that figures, dates and links come from your own material.
- When something is wrong or out of date, you know which note to fix.
How it works
- Add MemoryBrain as a connector in ChatGPT or Claude with a URL. Nothing to install.
- Sign in with your email and a 6-digit code.
- Ask things like "Save this to my brain", "Import my Kindle highlights" or "Where was I with the pilot?".
- It lives in the cloud: your computer does not need to be on, and it also works on your phone.
https://app.memorybrain.ai/mcpStep-by-step guide: Same memory in ChatGPT and Claude.
What is tested and what is not
- Tested: ChatGPT (web; in our tests it took a Plus or Pro plan) and Claude (web and iPhone app).
- Not tested: Claude Code, Cursor, VS Code, Gemini, Le Chat, Perplexity and Copilot. We don't say it works until we have tested it.
The method behind it
MemoryBrain is built on Open Brain, an open method for building a second brain an AI can use: how notes are drawn from a source, how they are linked, and how each one keeps where it came from.
Frequently asked questions
Does it replace ChatGPT's memory?
No. It works alongside it, and it is the same in ChatGPT and in Claude.
Who can see my notes?
You. In your account you see all your notes, download them in one file and revoke access per app. Details in the privacy policy.
Do I need to code?
No. You add it from the ChatGPT or Claude settings by pasting a URL.
How much does it cost?
It is in private beta and has no published price.
Is it the same as memorybrain.in?
No. It is a different product, not related to this one.
Try it
See how it works without an account, or join the beta waitlist.
Sources
- OpenAI, ChatGPT release notes and Memory FAQ. Accessed November 8, 2026.
- Anthropic, Use Claude's chat search and memory. Accessed November 8, 2026.
- Notion, shared memory announcement, November 4, 2026.