Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.

Wire is a cross-platform, encrypted instant messaging client created by Wire Swiss. It is available for iOS, Android, Linux, Windows, macOS and Web browser cl…

Zulip is a chat and collaborative software.

RetroShare is open source software for encrypted filesharing, serverless email, instant messaging, online chat, and BBS, based on a friend-to-friend network b…

TorChat is a decentralized anonymous instant messenger that uses Tor hidden services as its underlying network. It provides cryptographically secure text mess…

Pidgin-Encryption transparently encrypts your instant messages with RSA encryption.