WebSockets & Realtime Packages
Realtime communication libraries for WebSockets, pub/sub channels, and live data sync — the building blocks behind chat, presence, and collaborative UIs.
Packages in WebSockets & Realtime
Kind
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ws
A simple, blazing-fast, thoroughly tested WebSocket client and server library for Node.js.
Uvicorn
A lightning-fast ASGI server for Python, built on uvloop and httptools.
undici
A fast, spec-compliant HTTP/1.1 client for Node.js, built from scratch with zero runtime dependencies
aiohttp
Asynchronous HTTP client and server framework for Python's asyncio, covering both API calls and building web/WebSocket services.
Socket.IO
Bidirectional, low-latency, event-based realtime communication for Node.js and the browser.
websocket
A fast, RFC 6455-compliant WebSocket implementation for Go with full control over framing, compression, and concurrency.
webpack-dev-server
The official live-reloading development server for webpack, with hot module replacement, HTTPS, and proxying built in.
@hono/node-server
The official Node.js adapter that runs your Hono application on a native Node HTTP server using web-standard APIs.
websockets
Build correct, fast WebSocket servers and clients in Python with asyncio, threading, or Sans-I/O APIs.
axum
Ergonomic and modular HTTP routing and request-handling framework for Rust, built on Tokio, Hyper, and Tower.
Yjs
A high-performance CRDT that exposes shared data types for building conflict-free, real-time collaborative applications.
tokio-tungstenite
Asynchronous, Tokio-native WebSocket streams built on tungstenite
http-proxy-middleware
The one-liner Node.js proxy middleware for connect, express, next.js, hono, and more.
eventsource-parser
A fast, source-agnostic streaming parser for Server-Sent Events (SSE), used to build EventSource clients and stream LLM responses.
y-protocols
Binary encoding protocols for syncing Yjs documents, broadcasting awareness/presence, and signaling authorization errors
Slack SDK for Python
The official Python SDK for building apps, bots, and integrations on the Slack Platform.
Socket.IO Redis Adapter
Scale Socket.IO across multiple server instances by broadcasting events through Redis
slack
A comprehensive Go client for the Slack Web API, RTM, Events API, and Socket Mode.
Hocuspocus
A plug-and-play Yjs WebSocket backend for real-time collaborative editing
graphql-ws
Zero-dependency server and client implementing the GraphQL over WebSocket Protocol
Chat SDK
A unified TypeScript SDK for building chat bots and AI agents across every major messaging platform
partysocket
A drop-in, auto-reconnecting WebSocket client with message buffering and React hooks
EventSource
WhatWG/W3C-compliant EventSource (Server-Sent Events) client for JS runtimes
Actix Web
A powerful, pragmatic, and extremely fast web framework for Rust
