Top MESSAGING GitHub Repositories & Tools (2026)

Macro is a unified workspace for teams: email, chat, docs, tasks, agents, calls, and CRM — @-linked together with shared AI memory.

Free implementation of Play Services

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

Apache Iggy: Hyper-Efficient Message Streaming at Laser Speed

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

Spring Cloud Alibaba provides a one-stop solution for application development for the distributed solutions of Alibaba middleware.

Efficient reliable UDP unicast, UDP multicast, and IPC message transport

Distributed Application Framework for .NET

A community-driven replacement for JSQMessagesViewController

bluetooth mesh chat, IRC vibes

The most widely used PHP client for RabbitMQ

120 marketing skills as an AI marketing staff — plugin, portable skills, or an 8-bot team across 7 disciplines (narrative, SEO/GEO, social, email, paid, influencer, launch) on one contract, with 8 auditor gates: TALE · CORE-EEAT · CITE · ECHO · SEND · ROAS · STAR · RAMP.

Apache ActiveMQ

Unofficial Firebase Admin SDK for PHP

Movim - Decentralized social platform

Rust client for NATS, the cloud native messaging system.

🚀 Apache RocketMQ built in Rust 🦀 — faster, safer, and more memory-efficient. Powering high-performance messaging for the AI era, with AI Agent, MCP, and AI-SRE capabilities.

Apache Artemis

Tox Reference implementation for Android

SmallRye Reactive Messaging