Cost / License
- Free
- Open Source (GPL-3.0)
Application types
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Flatpak
- AppImageHub
- Snapcraft
- Flathub




The best open source alternative to Telegram is Signal. If that doesn't suit you, our users have ranked more than 100 alternatives to Telegram and loads of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Telegram are Element, Tox, Wire and Matrix.




Valour is an open-source, privacy focused alternative to platforms like Discord or Slack, developed by a small team of volunteers. The app has been in development for over three years and is currently in it's alpha stages of testing.


Conduit is a simple, fast and reliable chat server powered by Matrix. Conduit is an alternative to Synapse and tries to be lightweight and easy to install, but it is still in development.

Converse is a messaging app for decentralized, secure, end-to-end encrypted conversations. Built on the XMTP network, Converse lets you own your conversations and take them anywhere whenever you want, ensuring your most important messages—the ones you never want to lose or be...




Technitium Mesh is a secure, anonymous, peer-to-peer (p2p), open source instant messenger designed to provide end-to-end encryption. Primary aim of developing this instant messenger is to provide privacy which is achieved using cryptography and anonymity using Tor network.

Lightweight and powerful XMPP client for iPhone and iPad, with audio and video calls and built-in privacy
Kotatogram Desktop is an modified version of official Telegram Desktop app. Aside from having all features that official app does, it has some more features, such as:



Monal is an open source iOS and macOS XMPP Chat-Client. It can connect to any standard XMPP chat server such as Gtalk or Facebook chat.



Unofficial whatsapp web desktop client for OSX, Linux and Windows. Build with Electron.