Dialog

An end-to-end encrypted messenger that needs no phone number or email. · dialog.pm

• Anonymous account: the server gives you a random 16-digit number; you choose a password and get a 24-word recovery phrase. A phone number is optional, only so contacts can find you.
• Signal Protocol through libsignal, with post-quantum key exchange (PQXDH, Kyber), sealed sender and a public key transparency log.
• Messages, voice and video calls, files, 1:1 and in groups; disappearing messages, view-once photos and voice messages, voice effects including an anonymized voice.
• Up to 6 devices per account, several accounts on one device; local data encrypted with your password, not the OS key store.
• Open source (AGPL-3.0), server in Germany (EU), and you can run your own server.

Download: Google Play · Microsoft Store · Windows, macOS, Linux · Android APK · iPhone coming soon

This repository

This repository holds the mobile app (Android, iOS) and the Rust core it is built on:

• mobile/ — the Flutter app; mobile/rust is the bridge to the core (flutter_rust_bridge)
• crates/chat-core — the client core: Signal protocol sessions (libsignal), sealed sender, private groups (zkgroup), key transparency, the encrypted local database (SQLCipher)
• crates/voice-fx — on-device voice effects and noise suppression
• docs/ — architecture, server API and protocol notes

The desktop app is at DialogPM/desktop.

Build

Requirements: Flutter (stable), Rust (stable) with the Android/iOS targets, and the Android SDK

• NDK or Xcode. See mobile/README.md for details, release signing and push setup.

cd mobile
flutter pub get
flutter run

The app connects to https://chat.dialog.pm by default. To build it for another server:

flutter build apk --dart-define=CHATAPP_DEFAULT_SERVER=https://chat.example.org

Push notifications need your own Firebase configuration (android/app/google-services.json, ios/Runner/GoogleService-Info.plist); without it the app works and notifies while running.

License

GNU Affero General Public License v3.0.