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