An instrument for people who think faster than they can be tracked.
A private AI across your whole digital life — messages, mail, notes, photos, browsing — gathered in one place on your Mac.
↓ Download for Mac
v0.2.3 · updated July 1, 2026 · release notes
runs on your own machine · your corpus is stored locally, not on our servers · no account needed to start
- Open the downloaded .dmg
- Drag commissure into your Applications folder
- Open it from Applications — macOS asks once on first launch, click Open. commissure is notarized by Apple.
or try it live — ask it anything about commissure · 10/day free
guest
no account, free · 10 questions/day
verified
email + passkey · 50 questions/day · $2 free AI credits
power
$9/mo · 200 questions/day + 25 AI calls · upgrade
your data
corpus stored on your machine · cloud AI is opt-in — BYO-key, credits, or a fully-local model