Pubsub GitHub Repositories (2026) · Open Source Tools

Send push notifications to your phone or desktop using PUT/POST

Scalable real-time messaging server in a language-agnostic way. Self-hosted alternative to Pubnub, Pusher, Ably, socket.io, Phoenix.PubSub, SignalR. Set up once and forever.

Eclipse iceoryx2™ - the true zero-copy data plane

Dapr is a portable runtime for building distributed applications across cloud and edge, combining event-driven architecture with workflow orchestration.

Real-time messaging library for Go. The simplest way to add feature-rich and scalable WebSocket support to your application. The core of Centrifugo server.

ZeroMQ core engine in C++, implements ZMTP/3.1

The open source and enterprise-ready webhooks service 🦀

An open source Valkey client library that supports Valkey, and Redis open source 6.2, 7.0 and 7.2. Valkey GLIDE is designed for reliability, optimized performance, and high-availability, for Valkey and Redis OSS based applications. GLIDE is a multi language client library, written in Rust with programming language bindings, such as Java and Python

HiveMQ CE is a Java-based open source MQTT broker that fully supports MQTT 3.x and MQTT 5. It is the foundation of the HiveMQ Enterprise Connectivity and Messaging Platform

MQTT Server/MQTT Broker - Scalable Distributed MQTT Message Broker for IoT in the 5G Era

Async .NET client for NATS: pub/sub, request/reply, JetStream, KV, Object Store, Services

Integration between ROS (1 and 2) and Gazebo simulation

node.js object relations mapper (orm) for redis

Highly optimized, extremely modular and very flexible XMPP/Jabber server

Google Cloud Client Libraries for Rust.

The official .NET client library for Apache Pulsar

EventMesh is a new generation serverless event middleware for building distributed event-driven applications.

A rclcpp-compatible true zero-copy IPC middleware that supports all ROS message types, including message structs already generated by rosidl.

Azure Web PubSub Service helps you to manage WebSocket connections and do publish and subscribe in an easy way

AMQP on Pulsar protocol handler