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
Psi+ Project — development branch of Psi XMPP client
The FetLife App on Android
A patched version of discord, with bot login support
A free peer-to-peer (P2P) BitTorrent file sharing client
Telegram Desktop messaging app
A smaller, faster, and easier IM client
Low-latency, high quality voice chat for gamers
The pinnacle of file-sharing and chat - an innovative DC client!
Take control of your Discord experience with GoofCord
Elegant Facebook Messenger desktop app
Mattermost Desktop application for Windows, Mac and Linux
Mumble is an open-source, low-latency, high quality voice chat
The first messaging platform operating without user identifiers
The Leading Open Source Communication Hub | Community Version
The game engine for everyone
WhatsApp library for NodeJS that connects through the browser app
An instant messaging client for XMPP networks