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
Development toolkit for Web Services and XML data bindings for C & C++
ArmCord is a custom client designed to enhance your Discord experience
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
Low-latency, high quality voice chat for gamers
Elegant Facebook Messenger desktop app
Mattermost Desktop application for Windows, Mac and Linux
Telegram Desktop messaging app
Take control of your Discord experience with GoofCord
The game engine for everyone
A glossy Matrix collaboration client for the web
The Leading Open Source Communication Hub | Community Version
The first messaging platform operating without user identifiers
VICIdial Contact Center Suite
Private messenger for Windows, Mac, and Linux
Machine learning, conversational dialog engine for creating chat bots
WhatsApp library for NodeJS that connects through the browser app
Program for filesharing using Direct Connect and ADC protocols
Mumble is an open-source, low-latency, high quality voice chat
for Adium, Pidgin, Miranda and Telepathy IM Framework