Telegram
Free
Telegram is a free cloud-based instant messaging platform.
Viber
Freemium
Viber Free Messenger and Phone Calls.
Empathy
Open Source
Empathy is an instant messaging (IM) and voice over IP (VoIP) client which supports text, voice, video, file transfers, and inter-application communication ov…
Bit Chat
Open Source
Bit Chat is a secure, peer-to-peer, open source instant messenger with end-to-end encryption.
Tox
Open Source
Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.
Signal
Open Source
Signal is the most scalable encryption tool.
Wire
Free
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
Open Source
Zulip is a chat and collaborative software.
