I built Second Brain because I kept hitting the same wall.
I'd have a really productive session with Claude, talk through an architecture decision, get to a clear conclusion, close the tab. Next day I'd open a new chat and have to explain everything from scratch. Same thing with Cursor. Same thing with ChatGPT. Every tool starts fresh, every time.
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.
