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
Development toolkit for Web Services and XML data bindings for C & C++
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
The FetLife App on Android
Psi+ Project — development branch of Psi XMPP client
A patched version of discord, with bot login support
A free peer-to-peer (P2P) BitTorrent file sharing client
A smaller, faster, and easier IM client
Low-latency, high quality voice chat for gamers
Mattermost Desktop application for Windows, Mac and Linux
The pinnacle of file-sharing and chat - an innovative DC client!
Telegram Desktop messaging app
Elegant Facebook Messenger desktop app
Take control of your Discord experience with GoofCord
The first messaging platform operating without user identifiers
An instant messaging client for XMPP networks
The game engine for everyone
A glossy Matrix collaboration client for the web
The Leading Open Source Communication Hub | Community Version
Private messenger for Windows, Mac, and Linux