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
ArmCord is a custom client designed to enhance your Discord experience
Development toolkit for Web Services and XML data bindings for C & C++
An intranet chat application that does not require a server.
Psi IM — Qt-based XMPP client
Psi+ Project — development branch of Psi XMPP client
A patched version of discord, with bot login support
Telegram Desktop messaging app
Mattermost Desktop application for Windows, Mac and Linux
Private messenger for Windows, Mac, and Linux
The first messaging platform operating without user identifiers
Low-latency, high quality voice chat for gamers
Take control of your Discord experience with GoofCord
WhatsApp library for NodeJS that connects through the browser app
VICIdial Contact Center Suite
A glossy Matrix collaboration client for the web
Mumble is an open-source, low-latency, high quality voice chat
The Leading Open Source Communication Hub | Community Version
The game engine for everyone
Elegant Facebook Messenger desktop app
A New Kind of Instant Messaging
Feature rich WhatsApp Client for Desktop Linux