Mumble

Low-latency voice chat with a desktop client and a lightweight server, built on Qt and the Opus codec, for groups that talk while they play or work.

8.4k stars, 1.4k forks C++ On GitHub since February 2011

Visit website View on GitHub How to run it

What is Mumble?

Mumble consists of two parts: the mumble client for Windows, Linux, FreeBSD, OpenBSD and macOS, and mumble-server, formerly called Murmur, which runs wherever Qt is available. Users join channels on a server and talk with low delay and high audio quality thanks to Opus. Plugins add features that the main application lacks, and translations are managed on Weblate. Because the server is small, it is common to run your own for a guild, team or event.

Good fit if

  • You want a TeamSpeak or Discord voice replacement that runs on your own hardware.
  • Audio latency matters more to you than text chat features.

Look elsewhere if

  • You want a full community app with text channels and voice in one client: Fluxer.
  • You need team text chat first: Zulip or Mattermost.

Before you adopt it

Mumble is under a BSD license with no paid parts. A small core team maintains it actively. Windows and macOS builds are published; the master branch holds unstable code, so build stable versions from their release branch.

Drafted with AI from the project's README and repository data, then checked against that data on 31 October 2026. Report a correction

Mumble health: is it still maintained?

82 of 100, actively developed

  • Activity
    322 commits in the last 90 days, the latest on 30 October 2026.
    30 / 30
  • Contributors
    8 people wrote the latest 100 commits; the most active wrote 56% of them.
    13 / 20
  • Releases
    3 releases in the last 12 months; the latest, v1.5.939, on 11 October 2026.
    15 / 20
  • Replies to issues
    Maintainers answered 79% of recent issues, with a median first reply after 1 hour.
    18 / 20
  • Security practices
    OpenSSF Scorecard 6.4 of 10.
    6 / 10

Read from GitHub on 4 November 2026. How the score works

Mumble license: is it open source?

Mumble uses BSD, an open-source license approved by the OSI.

  1. February 2011First published on GitHub.
  2. TodayBSD.

How to run Mumble yourself

Docker
No Docker files in the repository
Compose file
None in the repository
Setup effort
Not rated: no compose file to judge from
Kubernetes
No Helm chart in the repository
Desktop and mobile
Builds for Windows, macOS in GitHub releases
Interface languages
English only

Install instructions: mumble.info or the README on GitHub.

Alternatives to Mumble

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All 12 projects in Team chat

Questions about Mumble

Is Mumble open source?

Yes. Mumble is published under BSD, an OSI-approved open-source license.

Is Mumble still maintained?

Its health score is 82 of 100 (actively developed). It had 322 commits in the last 90 days, the latest on 30 October 2026, and its latest release came out on 11 October 2026.

How do I run Mumble?

You can run it as an app for Windows, macOS. The README on GitHub has the exact steps.

What are the alternatives to Mumble?

Close alternatives in the Team chat category include ejabberd, Mattermost, Element.