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.
This is the 2nd launch from Second Brain for AI. View more
Second Brain for AI v2
Launched this week
Second Brain remembers your projects, people, decisions, and preferences across Claude, ChatGPT, Cursor, Codex, and any MCP client. V2 automatically links related memories, follows those connections during recall, and distinguishes settled decisions from drafts and stale context. Open source and self-hosted in your Cloudflare account.
Free
Launch Team / Built With
Finally something that solves the most frustrating part of using AI. Plugged it into Claude and Cursor and the recall by meaning actually works, way better than digging through old chats. Love that it's self-hosted too.
Second Brain for AI
@phardinghy4670 The recall-by-meaning piece was the hardest to get right. Glad it's landing as actually useful rather than just technically interesting.
Second Brain for AI
I don't just build Second Brain. I use it every day.
Today I stored every comment, every piece of feedback you all left on the launch. Then asked it to tell me what v3 should focus on. That screenshot is the answer.
Top 5 on Product Hunt. Honestly didn't see that coming.
Thank you. Every comment, every upvote, every share, it's what makes building this worth it. You're not just users, you're shaping what this becomes.
v3 is already taking shape because of you.
I often work across multiple agents, but messages and memory are not shared between them, which means I need to frequently copy context back and forth. The appearance of Second Brain is truly a lifesaver!
Second Brain for AI
@1251912798 That context-copying tax is the exact problem Second Brain was built to eliminate. Really glad it's working for you!