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.
An intranet chat application that does not require a server.
The FetLife App on Android
You can message and share files inside your intranet without a server.
A universal instant messaging (IM) program
A Windows client for the Direct Connect networks
A beautiful SMS messenger for Android
Tiny alternative Discord client with a smaller footprint and support
Mattermost Desktop application for Windows, Mac and Linux
Dev tools to reliably understand text and automate conversations
Psi IM — Qt-based XMPP client
Psi+ Project — development branch of Psi XMPP client
The pinnacle of file-sharing and chat - an innovative DC client!
An alternative Discord client with voice support made with C++ and GTK
WhatsApp library for NodeJS that connects through the browser app
Tool for building chat bots, apps and custom integrations
A simple unofficial Discord client to use as an example
Development toolkit for Web Services and XML data bindings for C & C++
Dark Mode tốt nhất cho Zalo
The game engine for everyone
The first messaging platform operating without user identifiers
A free peer-to-peer (P2P) BitTorrent file sharing client
Elegant Facebook Messenger desktop app
Desktop application for Instagram DMs
Open source machine learning framework to automate text conversations
A smaller, faster, and easier IM client