Zero-server · End-to-end encrypted

Cipher

We can't read your messages. Neither can anyone else.

Cipher has no backend.

Your iCloud, their iCloud, nothing else

Messages travel through CloudKit Shared Zones — Apple's own infrastructure. We don't operate a relay, a database, or a queue.

Keys never leave your device

Curve25519 identity keys live in iOS Keychain. The private halves don't sync, can't be extracted, and never see the network.

Signal-style cryptography

X3DH key agreement, Double Ratchet sessions, ChaCha20-Poly1305 AEAD. All via Apple's CryptoKit — not custom code.

Burn means burn

One tap deletes every message on both devices, destroys the keys that decrypted them, and rotates your identity.

Pricing — subscription only.

Free

$0
  • 3 contacts
  • End-to-end encrypted text chat
  • App Lock with Face ID / PIN
  • One-tap burn

Pro

$4.99/mo · $29.99/yr

7-day free trial

  • Unlimited contacts
  • Encrypted image messages
  • 6 themes & custom wallpapers
  • Hidden chats

Pro+

$9.99/mo · $59.99/yr

14-day free trial

  • Everything in Pro
  • Duress PIN
  • Screenshot detection
  • iPad / Mac / Apple Watch sync