Create together, in private

A free, open source, developer‑extensible
collaboration tool for everyone.

Try Composer

No servers, no fees

Composer synchronizes data between collaborators directly over secure, peer-to-peer connections.

There is no need for servers or cloud storage providers. This is part of why it's free.

Work offline,
collaborate real-time

Edit content while offline and sync automatically when online.

Watch others type in real-time when online.

Privacy is a human right

No servers or cloud storage providers mediate the encrypted connections with your collaborators.

You own your data entirely and it never leaves the devices you trust.

Completely malleable

Developers can modify and extend any part of Composer.

Users benefit from a growing ecosystem of extensions and integrations.

Sign-up to join the Composer Beta.