Mumble

Mumble provides open-source software for real-time voice chat with low latency.

github.com/mumble-voip/mumble
Mumble homepage screenshot

About Mumble

Mumble is open-source voice-chat software with two modules: the client (mumble) and the server (mumble-server, formerly murmur). It is written on top of Qt and Opus for low-latency communication.

The client works on Windows, Linux, FreeBSD, OpenBSD, and macOS, while the server works where Qt can be installed. It supports general-purpose plugins and various languages.

Key features

  • Separate client and server modules for voice chat
  • Low-latency voice communication built on Qt and Opus
  • Client support for Windows, Linux, FreeBSD, OpenBSD, macOS
  • Server operation on systems where Qt can be installed
  • General-purpose plugins for added functionality
  • Interface available in various languages
Best for: People who want to set up their own client-server voice chat on supported desktop systems.
Good for
  • Open-source codebase for client and server
  • Low-latency design using Qt and Opus
  • Client available across Windows, macOS, Linux and BSD variants
Watch out for
  • Master branch contains unstable code, requiring branch selection for stable builds

Mumble at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Open source
Not stated
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026

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Mumble FAQ

What are the two Mumble modules?
The client (mumble) and the server (mumble-server, formerly known as murmur).
Which systems does the client support?
Windows, Linux, FreeBSD, OpenBSD, and macOS.
How do I build a stable version?
Select the corresponding branch, such as 1.5.x, rather than master, which contains unstable code for a future release.
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