End-to-end encrypted messaging for iOS and Android

Your conversations are yours.

Messages and photos are encrypted on your device, before anything leaves it.

View on the App Store Android: coming to Google Play.

Privacy model

Built to keep secrets.

The hard technology stays out of your way.

Past stays private: Encryption keys keep changing, so one exposed key cannot decrypt earlier messages.
Photo attachments: Photo content is encrypted before the service stores or routes it.
Necessary metadata: The service still processes account identifiers, room membership, delivery state, and attachment transfer metadata to operate.

Under the hood: MLS · QUIC

One bar of signal

One bar of signal is the whole requirement.

Messages and photos still go out on connections slow enough that most apps give up.

Elevators
The doors close, the bars fall to one, and what you just sent still leaves.
Subways
Signal vanishes in the tunnel. Sending picks up where it stopped the moment it returns.