Cost / License
- Free
- Open Source
Application type
Platforms
- Android
- Android Tablet
- F-Droid
- Mumble
Mumble is described as 'Was the first and is the most successful and wide spread free and open source software for VoIP. It was the first VoIP software to provide low-latency audio suitable for gaming, and at the same time was a pioneer in high audio quality' and is a very popular Video Calling app in the social & communications category. There are more than 50 alternatives to Mumble for a variety of platforms, including Android, Windows, Web-based, iPhone and Linux apps. The best Mumble alternative is Element. It's not free, so if you're looking for a free alternative, you could try Element or Discord. Other great apps like Mumble are TeamSpeak, Element X, Zorium and Mirotalk.
Ventrilo is a real-time voice chat software for group communications with surround sound support.


Conduit is a simple, fast and reliable chat server powered by Matrix. Conduit is an alternative to Synapse and tries to be lightweight and easy to install, but it is still in development.

uMurmur is a minimalistic Mumble server primarily targeted to run on embedded computers, like routers, with an open OS like e.g. OpenWRT.
A creation app with real-time transcription. Collaborate or go solo to bring your audio thoughts, ideas, and conversations to life. Ignite your creative spark ?



Lifesize Go gives you instant access to your own high-quality free video meeting space. Host meetings with up to eight participants from your phone or laptop without needing to download an application or install updates.




TeamTalk 4 is a conferencing system which enables a group of people to collaborate and share information. Every member of a group can communicate with other members in real time using both audio and video. All that is needed is a microphone and a web camera.




The application is a push-to-talk (PTT) walkie-talkie for consumers and business and available for Android, iOS, Blackberry, Windows Phone, Windows PC, rugged mobile devices and two-way radios.



With GSC, you can pick from any of 14 worldwide datacenters to host your own free voice server. Get full rights to create rooms, kick and ban users, and personalize your voice server. Plus, your settings are always saved - the voice chat room doesnt disappear when you log off.


Make video calls to anybody in the world with a private connection. Share the conversation by sharing url.

Small program mainly aimed to provide a simple user interface for making VoIP calls with Asterisk PBX (an open source VoIP PBX).
Grow a community, connect with your friends, or whatever you're capable of with Adapt, a lightweight and customizable messaging platform which favors your privacy.
