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
An intranet chat application that does not require a server.
Development toolkit for Web Services and XML data bindings for C & C++
Psi IM — Qt-based XMPP client
ArmCord is a custom client designed to enhance your Discord experience
Psi+ Project — development branch of Psi XMPP client
The FetLife App on Android
A smaller, faster, and easier IM client
A free peer-to-peer (P2P) BitTorrent file sharing client
A patched version of discord, with bot login support
The Leading Open Source Communication Hub | Community Version
The first messaging platform operating without user identifiers
Low-latency, high quality voice chat for gamers
The pinnacle of file-sharing and chat - an innovative DC client!
Telegram Desktop messaging app
An instant messaging client for XMPP networks
The game engine for everyone
A simple unofficial Discord client to use as an example
Tiny alternative Discord client with a smaller footprint and support
A glossy Matrix collaboration client for the web
Mattermost Desktop application for Windows, Mac and Linux
VICIdial Contact Center Suite