ONYX Messenger

Private and anonymous self-hosted messenger.

Features

• End-to-end encrypted messaging
• Self-hosted — you control the server
• Group chats, favorites and direct messages
• LAN messaging
• Proxy support
• Platforms: Windows, Linux, macOS, Android
• Anonymous accounts — no phone number or email required

Building

Requires Flutter SDK.

flutter pub get
flutter run

Server

The server component is available at: https://github.com/wardcore-dev/onyx-server

License

Copyright (C) 2026 WARDCORE

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

See LICENSE.txt for full terms.