End-to-end encryption
Every message is sealed with XChaCha20-Poly1305 before it leaves your device. Only the people you send it to can read it.
BETA • Open Source • v0.3.0
Stay in touch
Stay in touch
with the people
who matter.
Share posts, photos, and messages with friends and family — end-to-end encrypted, with no servers in the middle. Your conversations stay between you. Full stop.
How it works
Install the app and you're in — no email, no phone number, no sign-up form. Cipher generates a 24-word recovery phrase that becomes your identity, and everything you send is encrypted on your device before traveling peer-to-peer to your friends.
- Identity
- 24-word BIP39 recovery phrase generates deterministic Ed25519 keys
- Encryption
- XChaCha20Poly1305 with ephemeral X25519 keys for forward secrecy
- Transport
- Direct P2P connections using Iroh gossip protocol over QUIC
- Storage
- Local SQLite database on your device, never in the cloud
Features
Serious cryptography, none of the homework
No passwords, no accounts
Your 24-word recovery phrase is your identity and your keys. There's no password to leak and no account database to breach.
Peer-to-peer networking
Messages travel directly between devices over Iroh. There's no central server to breach, mine, or shut down.
Forward secrecy
Every message uses fresh ephemeral keys, so past conversations stay private even if a key is ever compromised.
Native performance
Built with Rust and Tauri — small, fast, native apps that feel at home on every platform.
Open source
AGPL-3.0 licensed and fully auditable. Don't take our word for any of this — read the code.
Why use Cipher
Your data lives on your devices — and nowhere else
Completely free
No subscriptions, no ads, no tokens, no upsells. Free now, free forever.
Zero telemetry
No tracking, no analytics, no data collection. We couldn't sell your data if we wanted to — we never see it.
Local-first
Everything lives in a SQLite database on your device. It's yours — not a copy of yours on someone else's cloud.
Truly decentralized
Peers find each other through a DHT — no central authority, no single point of failure, nothing to switch off.
Multi-device sync
Enter your recovery phrase on a new device and your account comes with you — no migration dance.
Secure file sharing
Send photos and files straight to your friends' devices, encrypted the entire way.
Get Cipher
Available for macOS, Android, and iOS (TestFlight)
Try Cipher today
Cipher is in open beta. Download it, invite a friend, and tell us what you think — or what breaks.