Cipher - Private messenger

Let's Do It!

About this app

Cipher is a private messenger built on the same non-custodial principle as a hardware crypto wallet — applied to your conversations. We can't read your messages. Not because we won't. Because we can't.

Most “private” apps make a promise: we encrypt your data, and we promise not to look. That promise depends on trusting a company, its employees, its future owners, and how it responds to government pressure — forever. The moment any of that changes, so does your privacy.

Cipher removes the need to trust us at all. The guarantee isn't a policy a future executive could reverse — it's a mathematical fact about how the system is built.

What’s new

Alpha: all Cipher Plus features are FREE for early testers — on-device AI translation, voice-note transcription & read-aloud, live call captions, and group chats. This build also adds the full plan picker (Cipher Plus/Teams) plus the Cipher Line private-number add-on and calling-credit top-ups. 1:1 chats and Cipher-to-Cipher calls are always free.