Your Privacy, Secured

We use robust end-to-end encryption, so that every message and file is only able to be read by you and the people you’re communicating with, even in the (unlikely) event of a data breach.
A secure message with end-to-end encryption in action.

Trusted Technology with the Matrix Protocol

Clamshell uses encryption based on the Matrix open standard, which relies on Olm (built on the Double Ratchet protocol popularized by Signal) and Megolm for large-scale security. Matrix encryption has been positively audited by NCC Group, a global cybersecurity leader, and is trusted by major organizations like NATO and the French and German governments.
Matrix text.

Message Protection

Your messages are scrambled (encrypted) on your device and can only be unscrambled (decrypted) by you and the people you’re communicating with. This means that even if your data is somehow intercepted, no one else can read it.
Message Protection

Why This Matters to You

Total Privacy
Only you and your contacts can access your conversations— even we can't read your messages.
Transparency and Trust
Our open, community-vetted encryption ensures transparency and industry-leading security you can trust.
Your Data, Your Control
We design Clamshell so you always know who has access to your information—spoiler alert: only you do.