Second Brain: A Self-Hosted Persistent Memory Layer for AI Chat Tools
By
Rahil Pirani
Pale, doughy, and a touch sad. Eat if peckish.
Summary
Second Brain is a self-hosted, open-source memory layer for AI tools like Claude, ChatGPT, and Cursor. It solves the problem of AI sessions starting from scratch by allowing users to store context once and retrieve it semantically across sessions. Built on Cloudflare, it offers a free tier, MIT license, and ensures user data remains private. Features include duplicate detection, semantic search, and a web UI for managing stored context.
Key quotes
· 5 pulledI 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.
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.
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