Mumble

Mumble is open source software for voice and text chat. It combines written messaging with low-latency voice communication, reducing the delay between speech and reception during conversations. Voice chat is delivered with high-quality audio, while text chat lets users communicate in writing within the same program. Its defining focus is responsive voice communication alongside text-based messaging. Mumble is for people and groups that need both voice and written chat, particularly when low delay and audio quality matter. It can replace Slack when Slack is being used for these forms of communication. One important difference is scope: Mumble’s stated core purpose is specifically voice and text chat. The available information does not establish any broader functions beyond those two communication methods, so the comparison with Slack is limited to voice conversations and written messaging.