Viber
Freemium
Viber Free Messenger and Phone Calls.
Ring
Open Source
Ring (SFLphone) is an open-source SIP-compatible softphone and instant messenger for Linux, Microsoft Windows, OS X and Android.
Zello
Free Personal
Zello is an application for push-to-talk (PTT) walkie-talkie for consumers and business and available for Android, iOS, Blackberry, Windows Phone, Windows PC,…
Discord
Free
Discord is a freeware proprietary VoIP application designed for gaming communities.
Curse
Free
Curse is an online game portal and network of gaming websites.
Dialog Messenger
Free Personal
Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.
Compare TeamSpeak with alternatives
Compare Dialog Messenger and TeamSpeak and decide which is most suitable for you.