Mattermost Desktop application for Windows, Mac and Linux
An alternative Discord client with voice support made with C++ and GTK
The first messaging platform operating without user identifiers
A patched version of discord, with bot login support
Mumble is an open-source, low-latency, high quality voice chat
Feature rich WhatsApp Client for Desktop Linux
WhatsApp library for NodeJS that connects through the browser app
A New Kind of Instant Messaging
Open source machine learning framework to automate text conversations
A glossy Matrix collaboration client for the web
Elegant Facebook Messenger desktop app
Video- & audio-conferencing app for Nextcloud
The Leading Open Source Communication Hub | Community Version
Tiny alternative Discord client with a smaller footprint and support
The game engine for everyone
Franz is a free messaging app for services like WhatsApp, Slack, etc,
ArmCord is a custom client designed to enhance your Discord experience
Private messenger for Windows, Mac, and Linux
Take control of your Discord experience with GoofCord
(Golang) Go bindings for Discord
Java wrapper for the popular chat & VOIP service
Distributed messaging and streaming platform with low latency
Twake is a secure open source collaboration platform
Powerful open source team chat application
Android Chat SDK ➜ Stream Chat API. UI component libraries for chat