Chat GitHub Repositories (2026) · Open Source Tools

The Secure CommsOS™ for mission-critical operations

A set of Rust crates for interacting with the Matrix chat network.

A modern remake of Hotline for macOS, iOS, and iPadOS.

Valour is bringing communities into the future with unique features, blazing performance, and respect for users.

🐙 The Go backend powering OCTO — an open workplace built for humans × AI agents. REST & WebSocket APIs, Lobster (AI agent) orchestration, and WuKongIM real-time messaging control plane.

Live Helper Chat - live support for your website. Featuring web and mobile apps, Voice & Video & ScreenShare. Supports Telegram, Twilio (whatsapp), Facebook messenger including building a bot.

Laravel’s #1 real-time chat package. Direct messages, groups, voice notes, and much more, with a full messenger UI — plus a headless API. Install in one command.

Java AI application development framework (supports LLM-tool,skill; RAG; MCP; Agent-ReAct,Team-Agent). Compatible with java8 ~ java26. It can also be embedded in SpringBoot, jFinal, Vert.x, Quarkus, and other frameworks.

Gardenable group chats in the Atmosphere.

Decentralized private messenger with chat-shared tools and games for Android

A very simple Ticket System based on WhatsApp messages, that allow multi-users in same WhatsApp account.

🖥️ Second Life's official client

A lightweight SwiftUI chat UI framework with 11 built-in message types, 8 themes, and cross-platform iOS/macOS support

Convos :busts_in_silhouette: is the simplest way to use IRC in your browser

🐀 A decentralised discussion platform for communities.

Keybase Go Library, Client, Service, OS X, iOS, Android, Electron

A community-driven replacement for JSQMessagesViewController

Scribe-Android: Keyboards for language learners & Conjugate-Android: Wikidata based verb conjugation app

⌨️ Keyboard manager which works in identical way on both iOS and Android

Universal chat layer for building bots and agents.