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
Telegram Desktop messaging app
Psi IM — Qt-based XMPP client
Development toolkit for Web Services and XML data bindings for C & C++
Mattermost Desktop application for Windows, Mac and Linux
An intranet chat application that does not require a server.
A patched version of discord, with bot login support
An alternative Discord client with voice support made with C++ and GTK
Psi+ Project — development branch of Psi XMPP client
Private messenger for Windows, Mac, and Linux
A free peer-to-peer (P2P) BitTorrent file sharing client
A smaller, faster, and easier IM client
The pinnacle of file-sharing and chat - an innovative DC client!
The first messaging platform operating without user identifiers
The FetLife App on Android
Low-latency, high quality voice chat for gamers
The game engine for everyone
Elegant Facebook Messenger desktop app
VICIdial Contact Center Suite
Mumble is an open-source, low-latency, high quality voice chat
Open source machine learning framework to automate text conversations