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
ArmCord is a custom client designed to enhance your Discord experience
Mattermost Desktop application for Windows, Mac and Linux
Development toolkit for Web Services and XML data bindings for C & C++
Psi IM — Qt-based XMPP client
Psi+ Project — development branch of Psi XMPP client
A patched version of discord, with bot login support
An intranet chat application that does not require a server.
Telegram Desktop messaging app
An alternative Discord client with voice support made with C++ and GTK
The FetLife App on Android
Elegant Facebook Messenger desktop app
Low-latency, high quality voice chat for gamers
A free peer-to-peer (P2P) BitTorrent file sharing client
The first messaging platform operating without user identifiers
A smaller, faster, and easier IM client
The pinnacle of file-sharing and chat - an innovative DC client!
A hex editor for WeChat/QQ/TIM
Tiny alternative Discord client with a smaller footprint and support
Take control of your Discord experience with GoofCord
Private messenger for Windows, Mac, and Linux
The game engine for everyone
Mumble is an open-source, low-latency, high quality voice chat