One memory for all your AIs. Claude, ChatGPT, Cursor, Claude Code — they all forget you between sessions. SecondBrain fixes that.
The infrastructure layer for your thinking. One database, one AI gateway, one protocol.
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You explain yourself to Claude. Then again to ChatGPT. Then again to Cursor. Every conversation starts from zero. Your context, preferences, decisions, history — scattered across a dozen tools that don't talk to each other.
SecondBrain is different.
Connect once, remember everything. Every AI you use shares the same persistent memory of you — your preferences, your context, your accumulated knowledge. No more re-explaining.
Not a notes app. A managed database with vector search and an open protocol — built so that every AI tool you use shares the same brain.
Not locked to Claude, or ChatGPT, or whatever's winning this week. Any MCP-compatible client can plug in — Claude Desktop, Claude Code, ChatGPT, Cursor, VS Code Copilot. New model drops on a Tuesday? Plug it in. Your entire context is already there. Zero switching cost.
Your thoughts live in a Postgres database managed by Kealani. Not someone else's proprietary format. Not a SaaS that could shut down, change pricing, or get acquired. A database — the most boring, reliable, battle-tested technology in software.
Every thought gets converted into a vector embedding — a mathematical representation of what it means. Ask "what was I thinking about career changes?" and it finds your note about Sarah considering consulting, even though you never used the word "career." Semantic search.
Experiment with every new AI model without sacrificing a single piece of your accumulated knowledge.
You sign up, you get your brain, you connect your AIs. Kealani handles the Postgres, the vector embeddings, the MCP gateway.
Built on MCP — backed by Anthropic, OpenAI, Google DeepMind, Microsoft, and the Linux Foundation. Infrastructure, not a bet on one company.
MCP (Model Context Protocol) started as Anthropic's open-source experiment in November 2024. It's now backed by OpenAI, Google DeepMind, Microsoft, and the Linux Foundation.
It's not a bet on one company. It's infrastructure — like HTTP, like USB-C. One protocol. Every AI. Your data stays in one place, and every tool that speaks MCP can read it.
SecondBrain gives every AI you use a shared, persistent memory. Connect once, remember everything.