Launched this week
Second Brain for AI
Persistent memory for Claude, ChatGPT & Cursor. Free.
440 followers
Persistent memory for Claude, ChatGPT & Cursor. Free.
440 followers
Every AI conversation starts from zero. Your projects, decisions, and preferences disappear as soon as you close the chat. Second Brain fixes that. It is a self-hosted memory layer that works with Claude, ChatGPT, Cursor, and any MCP client. You can store context once and recall it by meaning instead of keywords. It includes duplicate detection, semantic search, and a web UI. Built on Cloudflare, it offers a free tier and your data remains yours. MIT licensed.
@rahilpirani Persistent memory across tools is something I keep running into as a builder. Does it work across different Claude/ChatGPT accounts or is it tied to the browser?
Second Brain for AI
Calling Clones
Second question! ( I separate it so you get more engagement! haha)
Could I connect this to a Raspberry Pi voice "flat mate" and use it as a shared memory layer?
So I can access to all my ChatGPT memory with that home device too?
Second Brain for AI
Is this a shared memory for absolutely everything? In most AI systems there is chat memory and overall account memory. It seems to me that in such a service it should decide itself what to pass from memory and what not to, otherwise it will consume a lot of tokens.
Second Brain for AI
Nice one @rahilpirani !
This can be run on-prem too?
Second Brain for AI
The product is good and very needed for those who want very personalised chats.
But even claude has a good context window not that big but decent
Second Brain for AI
@rahilpirani I might be wrong
Even ChatGPT has personalization
Second Brain for AI
@jay_gangwar It does, but only within ChatGPT. The moment you switch to Claude or Cursor, that memory is gone. Second Brain is the layer that works across all of them… one memory, every tool.
@rahilpirani yeah that is true.
Great solution. 😁👍
Second Brain for AI
Hey Product Hunt, I'm Rahil. I built Second Brain.
I got tired of explaining myself to every AI tool during each session. A new Claude window is a blank slate. A new Cursor project doesn’t know my stack. It adds up quickly.
Second Brain is a self-hosted memory layer that connects to Claude, ChatGPT, Cursor, and any MCP client. You store context once and recall it by meaning across any session. Everything lives in your own Cloudflare account, not on a third-party server. There's a free tier, and you don't need a subscription. You also get a web UI to browse and manage everything visually.
What makes it different:
It works with all your AI tools—not tied to one app.
It uses semantic recall, which finds memories by meaning instead of exact keywords.
It’s self-hosted, so your data stays in your own Cloudflare account.
There’s a free tier, so it costs nothing to run.
The web interface lets you browse, search, and manage memories visually.
II’m really curious: what context do you find yourself re-entering most? That has influenced my roadmap more than anything else.
Ask me anything. Big shout out to @fmerian for his support!
Does it work seamlessly with ChatGPT and Claude together?
Second Brain for AI
@nithin_raju1 Yes! Claude and ChatGPT both connect via MCP and pull from the same Second Brain memory layer. Store something in Claude, recall it in ChatGPT. Same context, same session history, across both.
That's actually one of the core reasons I built it... your memory shouldn't be locked to one tool.