The Second Brain desktop app gets you running in five minutes. No terminal. No git. Just download, set a password, and sign into Cloudflare. Then the real magic starts. Persistent memory across every AI tool you use.
Recall that just got a lot smarter. Surfaces the right memory, not just the newest one. A knowledge graph that builds itself. Your data in your own Cloudflare account, not ours. Mac and Windows. You asked for the app. You asked for better recall. We shipped both.
The more AI tools I used, the stranger their memory systems started to feel.
Claude knew one part of my life. ChatGPT knew another. Cursor understood a project until I switched tools. Every new assistant meant rebuilding context from scratch.
This is a question that does not get asked enough.
Right now, if you use a hosted AI memory tool, your context, your decisions, your preferences, your project history, all of it lives on someone else's servers. Governed by their retention policies. Subject to their pricing changes. Potentially readable by their team.
While building shared memory for teams, I spent a lot of time thinking about what AI should know. The more uncomfortable question was what should never enter the shared layer.
Private notes? Feedback about a teammate? A half-formed strategy?
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.
I want to talk about something that doesn t get discussed enough in product development: what happens when you actually listen to your community instead of your roadmap.
When we launched v1 of Second Brain here on Product Hunt, we had a plan. Then the comments came in. People told us newer isn t always more correct. That conflicting memories needed an authority model. That compression should preserve the through-line.
We're live on Product Hunt today with the Second Brain desktop app. I wanted to share what this journey has actually looked like.
Every feature in this product came from a comment. Not a roadmap. Not a strategy session. A comment from someone in this community who told us what was missing.
Most AI memory tools store your data on their servers. That means your context, decisions, and personal knowledge live in someone else's infrastructure, governed by their retention policies, subject to their pricing changes, and potentially readable by their team.
Second Brain v2 runs entirely on your own Cloudflare account.
