Real-Time Communication

Discover secure and private ways to communicate with others online without letting any third parties read your messages.

Encrypted Instant Messenger

Signal

Signal Signal is a mobile app developed by Open Whisper Systems. The app provides instant messaging, as well as voice and video calling. All communications are end-to-end encrypted. Signal is free and open source. VoIP


Wire

Wire A free software End-to-End Encrypted chatting application that supports instant messaging, voice, and video calls. Full source code is available. Warning VoIP


Complete Comparison

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Video/Voice Calling

Linphone

Linphone Linphone is an open source SIP Phone and a free voice over IP service, available on mobile and desktop environments and on web browsers. It supports ZRTP for end-to-end encrypted voice and video communication.


Mumble

Mumble Mumble is an open source, low-latency, high quality voice chat software primarily intended for use while gaming. Note that while Mumble doesn't log messages or record by default, it's missing end-to-end encryption, so self-hosting is recommended.


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Team Chat Platforms

Rocket.chat

Rocket.chat Rocket.chat is an self-hostable open source platform for team communication. It has optional federation and experimental E2EE. Experimental


Keybase

Keybase Keybase provides a hosted team chat with end-to-end encryption. It has also been indepedently audited (PDF). Warning


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