Skype
Freemium
Skype is an instant messaging and VOIP (Voice Over Internet Protocol) client to communicate with people in a distant place.
Viber
Freemium
Viber Free Messenger and Phone Calls.
Bit Chat
Open Source
Bit Chat is a secure, peer-to-peer, open source instant messenger with end-to-end encryption.
Telegram
Free
Telegram is a free cloud-based instant messaging platform.
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.
