- Senders send messages stamped with Bitcoin ecash to Nostr relays. The Nostr relays collect the Bitcoin ecash, then deliver messages to receivers.



Mumble is described as 'Open source, low-latency voice chat offering high quality audio, secure encryption, self-hosting, in-game overlays, positional audio, and granular permissions' and is a very popular Group Chat app in the social & communications category. There are more than 50 alternatives to Mumble for a variety of platforms, including Web-based, Windows, Android, 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, Echoed and Mirotalk.



Facilitates community collaboration through voice, video, and text chat, integrated docs and tasks, configurable channels, roles, and permissions, seamless mobile and desktop access, rapid message reactions, file sharing, and notification controls for groups.




DCTS (Direct Communication Through Sockets) is a self-hosted communication platform offering Discord's sleek interface with full data control. Set up your own server with just two commands (NodeJS + MySQL/MariaDB). No paywalls or subscriptions.




Sound Branch is a VoiceFirst team communication app that lets you communicate with friends, colleagues and beyond with voice messages. Talk and listen to the people that matter in your world and grow your own voice in a place where we can all be heard.




Start your next video call with a single click. No download, plug-in or login required. Just get straight to talking, messaging and sharing your screen.

A globally distributed messaging and voice/video platform built for communities that value speed, privacy, and reliability.
Common Ground is a browser-based, open-source social platform for communities, built as a robust alternative to Discord.



Roger Wilco is a real-time voice chat technology that enhances communication among communities of users on the Internet.
riffr is the social network that’s all about your voice. Discover great short-form audio content and post your own in the app. It’s like podcasting, but micro.




Leher is a live discussion social network, drop into club rooms and discuss with your network, community or friends.




Pensil is a community building platform that brings together members, engaging discussion & live events for brands and creators.



