You own the data
Plain Markdown files in your repo. No proprietary format, no vendor lock-in, no rug-pull. If Synapse ever disappears, your knowledge doesn't.
A family of apps for your second brain
Your knowledge.
Connected. Owned. Alive.
Synapse is a growing family of beautiful, GitHub-backed apps that turn your notes, meetings, and ideas into a living second brain — readable by you, your tools, and your AI agents.
The Synapse Philosophy
GitHub at the heart. Always.
Your second brain shouldn't be locked in someone else's database. Synapse apps write plain Markdown straight to a private GitHub repository you own — versioned, portable, and instantly readable by every AI tool on the planet.
Sync is just Git
Every device pulls and pushes the same repo. No bespoke sync engine, no mystery conflicts — just the most battle-tested versioning system on Earth.
Agent-ready by default
Because your knowledge is in a GitHub repo, every AI agent — Claude, Cursor, ChatGPT, your own — can read it, search it, and contribute back.
Built for the long haul
Markdown files are still readable in 50 years. Your second brain should outlive whatever app you happen to use today.
Built in the open
Open source. Always.
Every node in the Synapse family — Notes, Meetings, and the apps still to come — is open source, and will always stay that way. Read the code, file an issue, send a PR, fork it for your team. Your second brain shouldn't depend on a black box.
Synapse Cloud, coming soon, will offer an optional membership that unlocks advanced scheduled automations on your note vaults. The apps stay free and open. The membership is opt-in — for when you want a tireless agent tending your vault while you sleep.
The Family
Three apps. One brain.
Each Synapse app does one thing brilliantly — and they all sync through the same private GitHub vault.
The Synapse Family is always growing.
New apps are in the works. Each one will join the same ecosystem — your repo, your data, your brain. Want to be first to hear? Star Synapse Notes on GitHub.