Topics / #pubsub

Pubsub projects on GitHub

Publish-subscribe messaging systems for decoupled communication.

As of , the most-starred Pubsub projects on GitHub are redis (76.9K stars), ntfy (34.9K stars) and dapr (26.2K stars). GitHub.Locker tracks 20 Pubsub repositories with 405.6K stars combined. The fastest-growing on October 16 was redis, with +22 stars in a day.

20Projects
405.6KStars in total
+73Stars in a day
Browse in the catalog →github.com/topics/pubsub ↗

Hot right now

Most stars gained in a day · Oct 16

+22

redis

redis/redis · ★ 76.9K

Redis is an in-memory server used as a cache, data structure store, and document/vector query engine for building real-time, data-driven applications.

+14

ntfy

binwiederhier/ntfy · ★ 34.9K

ntfy is a simple HTTP-based pub-sub notification service that lets you send push notifications to your phone or desktop with a single PUT or POST request, without signing up or paying anything.

+6

nats-server

nats-io/nats-server · ★ 20.9K

This is the NATS server — the high-performance core of NATS.io, a messaging system for connecting digital systems, services and devices. It's a CNCF project.

+6

centrifugo

centrifugal/centrifugo · ★ 10.9K

Centrifugo is an open-source, language-agnostic real-time messaging server that lets any backend push messages to connected clients over WebSocket, HTTP-streaming, SSE, GRPC or WebTransport. It acts as a self-hosted alternative to Pubnub, Pusher, Ably, Socket.IO, Phoenix.PubSub and SignalR.

The all-time top

20 projects · by stars

  1. #1 · redis/redis

    redis

    Redis is an in-memory server used as a cache, data structure store, and document/vector query engine for building real-time, data-driven applications.

    76.9K
  2. #2 · binwiederhier/ntfy

    ntfy

    ntfy is a simple HTTP-based pub-sub notification service that lets you send push notifications to your phone or desktop with a single PUT or POST request, without signing up or paying anything.

    34.9K
  3. #3 · dapr/dapr

    dapr

    Dapr is an open-source, CNCF-graduated runtime for building distributed applications, workflows, and AI agents. It packages durable execution, secure service-to-service communication, state management, and event-driven messaging behind one consistent set of APIs.

    26.2K
  1. 4

    nsq

    25.8Knsqio/nsq · Go

    NSQ is a realtime distributed messaging platform — a message queue built to operate at scale, handling billions of messages per day.

  2. 5

    EventBus

    24.7Kgreenrobot/EventBus · Java

    EventBus is a publish/subscribe event bus for Android and Java. It simplifies communication between components — Activities, Fragments, Threads, Services — and decouples event senders from receivers.

  3. 6

    rocketmq

    22.6Kapache/rocketmq · Java

    Apache RocketMQ is an open-source distributed messaging and streaming platform for building event-driven applications, with low latency, trillion-level capacity and flexible scalability.

  4. 7

    go-redis

    22.3Kredis/go-redis · Go

    The official Redis client library for Go: you import it into your Go program to talk to Redis servers. It targets the last three Redis releases and speaks both RESP2 and RESP3.

  5. 8

    nats-server

    20.9Knats-io/nats-server · Go

    This is the NATS server — the high-performance core of NATS.io, a messaging system for connecting digital systems, services and devices. It's a CNCF project.

  6. 9

    uWebSockets

    19KuNetworking/uWebSockets · C++

    μWebSockets is a simple, secure and standards-compliant web server for demanding applications, built as a C++ library — so optimized for speed and memory that its TLS 1.3 encrypted messaging outruns most servers' cleartext.

  7. 10

    node-redis

    17.6Kredis/node-redis · TypeScript

    Node-Redis is a modern, high performance Redis client for Node.js — the library your JavaScript or TypeScript app uses to talk to a Redis server, with support for Redis Stack modules like JSON, Search and Time-Series.

  8. 11

    emqx

    16.8Kemqx/emqx · Erlang

    EMQX is an MQTT broker and messaging platform for IoT: it connects millions of devices, routes messages in real time, and bridges them into backend data systems. Aimed at AI, IoT, IIoT, connected vehicles and smart cities.

  9. 12

    pulsar

    15.3Kapache/pulsar · Java

    Apache Pulsar is a distributed publish-subscribe messaging platform built for horizontal scale, designed to handle millions of topics and millions of messages per second with strong ordering and durability guarantees.

  10. 13

    ioredis

    15.3Kredis/ioredis · TypeScript

    ioredis is a Redis client library for Node.js, built to be robust, performance-focused, and full-featured, covering Cluster, Sentinel, Streams, Pipelining, Lua scripting and Pub/Sub.

  11. 14

    redis-py

    13.7Kredis/redis-py · Python

    redis-py is the official Python client for the Redis key-value store — the interface your Python code uses to talk to a Redis server.

  12. 15

    mitt

    11.9Kdevelopit/mitt · TypeScript

    Mitt is a tiny functional event emitter / pubsub library for JavaScript, weighing less than 200 bytes gzipped.

  13. 16

    libzmq

    11Kzeromq/libzmq · C++

    libzmq is the core engine of ZeroMQ — a lightweight messaging kernel written in C++ that implements the ZMTP/3.1 protocol.

  14. 17

    centrifugo

    10.9Kcentrifugal/centrifugo · Go

    Centrifugo is an open-source, language-agnostic real-time messaging server that lets any backend push messages to connected clients over WebSocket, HTTP-streaming, SSE, GRPC or WebTransport. It acts as a self-hosted alternative to Pubnub, Pusher, Ably, Socket.IO, Phoenix.PubSub and SignalR.

  15. 18

    dicedb

    10.8Kdicedb/dicedb · C

    DiceDB is a fork of Valkey (itself a fork of Redis) that extends Valkey with extra capabilities, such as spilling evicted keys to disk, while staying fully compatible with the Valkey and Redis tooling and SDK ecosystem.

  16. 19

    capsule-identity

    8.4Kunicity-aos/capsule-identity · Rust

    It's the system-prompt builder capsule for Astrid OS (part of Unicity AOS) - it owns an agent's 'spark' identity, merges it with workspace and environment context, and assembles the resulting system prompt the LLM receives.

  17. 20

    constellation-gemini

    679brayonpi/constellation-gemini · Python

    Constellation is a demo project where Gemini turns an operator's spoken orbital-mission request into a checklist, HexStellar Cortex searches for a complete recovery schedule for a broken satellite network, and a separate independent Python program checks that schedule rule by rule before it's allowed to update the simulation.

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