Second Brain for AI

In plain words

Second Brain for AI is a self-hosted memory layer that persists context across conversations with Claude, ChatGPT, Cursor, and other MCP clients. It allows users to store project details, decisions, and preferences that would normally disappear after each chat session, then retrieve them through semantic search rather than keyword matching. The tool includes duplicate detection and a web interface, runs on Cloudflare's infrastructure, offers a free tier with user-owned data, and is MIT licensed for developers who want continuous context across their AI interactions.

written from the facts on this page · September 2026

From the sources

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.

One memory layer, every AI tool. Store anything once — recall it in Claude, ChatGPT, Cursor, or any MCP client. Self-hosted on Cloudflare's free tier. - rahilp/second-brain-cloudflare

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  Second Brain2025 · second-brain-lac-ten.vercel.app · ▲302

  Hi HN, I'm Dom, a solo founder. I built Second Brain to solve a common issue I had with AI chats: the knowledge disappears. There’s no structure, no memory, and no way to reuse or build on them. So I built a tool that combines AI chat with a visual, interconnected knowledge system. Key features: - Save AI responses into editable docs (Notion-style Pages). - AI Visual board with multiple content & chat nodes (like Miro meets ChatGPT). - Add and chat with YouTubes, TikToks, Audio, PDFs, GitHub repos, Looms, websites, etc. - Organize using Projects and Smart Tags — then chat with full contexts.…

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