Skype
Freemium
Skype is an instant messaging and VOIP (Voice Over Internet Protocol) client to communicate with people in a distant place.
Tox
Open Source
Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.
TeamSpeak
Freemium
TeamSpeak is software for quality voice communication via the Internet.
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.
Toky
Freemium
Toky is an automation platform.
Telegram
Free
Telegram is a free cloud-based instant messaging platform.
Signal
Open Source
Signal is the most scalable encryption tool.
Mattermost
Open Source
Mattermost is an open source, private cloud Slack-alternative, Workplace messaging for web, PCs and phones. MIT-licensed.
ICQ
Free
ICQ is an open source instant messaging software.
Dialog Messenger
Free Personal
Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.
Compare Viber with alternatives
Compare Dialog Messenger and Viber and decide which is most suitable for you.