TeamSpeak is a proprietary Voice over IP software that allows users to speak on a chat channel with other users, much like a t ...

Jitsi (previously SIP Communicator) is an audio/video and chat communicator with full end-to-end encryption that supports prot ...

Skype is the most popular free voice-over IP and instant messaging service globally. It allows users to text, video and voice ...

Mumble was the first and is the most successful and wide spread free and open source software for VoIP. It was the first VoIP ...

Wire is a secure and private messenger for phones, tablets and desktop. Crystal clear voice and video calls, private group cha ...

TextSecure and RedPhone have been merged to create Signal! Using Signal, you can communicate instantly while avoiding SMS fees ...

Hangouts is a messaging app that lets you send and receive messages, photos and more, and even start free video and voice call ...

Slack brings all your communication together in one place. It’s real-time messaging, archiving and search for modern teams.

Telegram is a messaging app created by former VK creators with a focus on speed and security. It’s superfast, simple and free. ...

Riot (formerly Vector) is an opensource interoperable app running on Web, iOS and Android. It is built around chat rooms, both ...

With the rise of widespread government monitoring programs, Tox is an easy to use application that allows you to connect with ...

WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SM ...

Ring positions itself as a potential free Skype replacement Open Source and cross-platform. Ring gives you a full control over ...