Browse free open source Chat software and projects for Linux below. Use the toggles on the left to filter open source Chat software by OS, license, language, programming language, and project status.
You can message and share files inside your intranet without a server.
A universal instant messaging (IM) program
An alternative Discord client with voice support made with C++ and GTK
An intranet chat application that does not require a server.
ArmCord is a custom client designed to enhance your Discord experience
Development toolkit for Web Services and XML data bindings for C & C++
A patched version of discord, with bot login support
Psi IM — Qt-based XMPP client
Telegram Desktop messaging app
Psi+ Project — development branch of Psi XMPP client
The first messaging platform operating without user identifiers
Mumble is an open-source, low-latency, high quality voice chat
Mattermost Desktop application for Windows, Mac and Linux
The game engine for everyone
Take control of your Discord experience with GoofCord
Private messenger for Windows, Mac, and Linux
Low-latency, high quality voice chat for gamers
Elegant Facebook Messenger desktop app
The Leading Open Source Communication Hub | Community Version
VICIdial Contact Center Suite
Tool for building chat bots, apps and custom integrations
Feature rich WhatsApp Client for Desktop Linux
WhatsApp library for NodeJS that connects through the browser app
A glossy Matrix collaboration client for the web
Franz is a free messaging app for services like WhatsApp, Slack, etc,