Chat GitHub Repositories (2026) · Open Source Tools

ZapFast: a fast, native WhatsApp client in Rust and egui

Open-source, self-hosted AI platform (PHP/Symfony): chat with any model, RAG over your docs, embeddable widget, MCP — see the cost of every answer. Apache-2.0.

Control your desktop from a browser, with P2P chat, file sharing, voice, video, and screen sharing powered by WebRTC.

Zulip server and web application. Open-source team chat that helps teams stay productive and focused.

MaiSaka, an LLM-based intelligent agent, is a digital lifeform devoted to understanding you and interacting in the style of a real human. She does not pursue perfection, nor does she seek efficiency; instead, she values warmth, authenticity, and genuine connection.

AI agents that know you and your work, in a chat app anyone can use. Open source, any model, self-host or hosted.

A fully-featured team and group chat application that you can easily selfhost.

Official successor to conduwuit

A community-driven Matrix homeserver

Take control over your live stream video by running it yourself. Streaming + chat out of the box.

A lightweight, secure, and feature-rich Discord terminal (TUI) client.

ClickClackClaw - The chat app with claws.

Self-hosted private chat: no cloud, no telemetry, no Big Tech. Discord alternative that runs on your own machine.

Robrix: a powerful multi-platform Matrix chat client written in Rust, using the Makepad UI toolkit and Robius platform abstractions

Use 30+ AI models (DeepSeek, Kimi, GLM, Claude, GPT-5.5, Gemini, Grok) in GitHub Copilot Chat - free via BYOK. No Copilot Pro needed.

A Discord client without the web browser. Native, written in Rust, about 30 MB of RAM idle.

A SwiftUI Chat UI framework with fully customizable message cells and a built-in media picker

Fully customizable AI chatbot component for your website

Twitch VOD and Live Stream archiving platform. Includes a rendered and real-time chat for each archive.

Web-based XMPP/Jabber chat written in JavaScript