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.
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...
Unlimited, private video calls, right in your browser. No extra apps. No tracking. Just free connections, powered by Brave .
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.
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:
Lightweight and powerful XMPP client for iPhone and iPad, with audio and video calls and built-in privacy
exteraGram - the unofficial modification is based on two versions, the official sources and the unofficial FOSS-modification of Telegram.
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.
Open source anonymous, registration free P2P chat. You communicate directly and no logs are saved on the server. Otr.to is browser based, which means that you don't need to install or ask somebody to install software.
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