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
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
An alternative Discord client with voice support made with C++ and GTK
Development toolkit for Web Services and XML data bindings for C & C++
A patched version of discord, with bot login support
Mattermost Desktop application for Windows, Mac and Linux
Telegram Desktop messaging app
Psi+ Project — development branch of Psi XMPP client
Mumble is an open-source, low-latency, high quality voice chat
The Leading Open Source Communication Hub | Community Version
Low-latency, high quality voice chat for gamers
Elegant Facebook Messenger desktop app
The first messaging platform operating without user identifiers
The game engine for everyone
Private messenger for Windows, Mac, and Linux
VICIdial Contact Center Suite
Take control of your Discord experience with GoofCord
A glossy Matrix collaboration client for the web
IRC application written in Rust
for Adium, Pidgin, Miranda and Telepathy IM Framework
Machine learning, conversational dialog engine for creating chat bots
Chat client for Twitch