Browse free open source Chat software and projects 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 Windows client for the Direct Connect networks
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
Mattermost Desktop application for Windows, Mac and Linux
A patched version of discord, with bot login support
Psi+ Project — development branch of Psi XMPP client
Telegram Desktop messaging app
The FetLife App on Android
A free peer-to-peer (P2P) BitTorrent file sharing client
A smaller, faster, and easier IM client
The first messaging platform operating without user identifiers
A hex editor for WeChat/QQ/TIM
Take control of your Discord experience with GoofCord
Mumble is an open-source, low-latency, high quality voice chat
The pinnacle of file-sharing and chat - an innovative DC client!
Low-latency, high quality voice chat for gamers
Elegant Facebook Messenger desktop app
The game engine for everyone
VICIdial Contact Center Suite
A private messenger for iOS