WebSockets and realtime

12-month change compares the average of the last 4 weeks of downloads with the first 4 weeks of the 52-week series. Gzip size is for the whole package, as measured by Bundlephobia. "-" means the value has not been fetched.

• simple-websocketSimple, EventEmitter API for WebSockets (browser)
• sanitySanity is a real-time content infrastructure with a scalable, hosted backend featuring a Graph Oriented Query Language (GROQ), asset pipelines and fast edge caches
• mock-socketJavascript mocking library for websockets and socket.io
• nano-pubsubZero dependency, tiny (<0.5 kb) publish/subscribe
• @d-fischer/isomorphic-wsIsomorphic implementation of WebSocket
• natsNode.js client for NATS, a lightweight, high-performance cloud native messaging system
• pusherNode.js client to interact with the Pusher Channels REST API
• pm2-axonHigh-level messaging & socket patterns implemented in pure js
• reconnecting-websocketReconnecting WebSocket
• brcastTiny data broadcaster with 0 dependencies
• @anycable/coreAnyCable JavaScript client library core functionality
• chaingateMulti-chain cryptocurrency SDK for TypeScript — unified API for Bitcoin, Ethereum, Litecoin, Dogecoin, Bitcoin Cash, Polygon, Arbitrum, and any EVM-compatible chain. Create wallets, query balances, send transactions, and manage tokens and NFTs across UTXO
• @stomp/stompjsSTOMP client for Javascript and Typescript
• botframework-streamingStreaming library for the Microsoft Bot Framework
• react-use-websocketReact Hook for WebSocket communication
• @ably/chatAbly Chat is a set of purpose-built APIs for a host of chat features enabling you to create 1:1, 1:Many, Many:1 and Many:Many chat rooms for any scale. It is designed to meet a wide range of chat use cases, such as livestreams, in-game communication, cust
• bytebufferThe swiss army knife for binary data in JavaScript.
• @liveblocks/clientA client that lets you interact with Liveblocks servers. Liveblocks is the all-in-one toolkit to build collaborative products like Figma, Notion, and more.
• @nats-io/transport-nodeNode.js client for NATS, a lightweight, high-performance cloud native messaging system
• graphql-sseZero-dependency, HTTP/1 safe, simple, GraphQL over Server-Sent Events Protocol server and client
• express-wsWebSocket endpoints for Express applications
• pubsub-jsDependency free publish/subscribe library
• @livekit/react-native-webrtcWebRTC for React Native
• @liveblocks/nodeA server-side utility that lets you set up a Liveblocks authentication endpoint. Liveblocks is the all-in-one toolkit to build collaborative products like Figma, Notion, and more.
• get-browser-rtcget webrtc browser methods unprefixed
• @liveblocks/reactA set of React hooks and providers to use Liveblocks declaratively. Liveblocks is the all-in-one toolkit to build collaborative products like Figma, Notion, and more.
• jest-websocket-mockMock websockets and assert complex websocket interactions with Jest
• extended-eventsourceSpec compliant EventSource implementation for browsers and Node.JS
• socketio-wildcardsocket.io with a wildcard event
• eventsource-polyfillA browser polyfill for W3C EventSource (http://www.w3.org/TR/eventsource/)
• react-native-webrtcWebRTC for React Native
• pubnubPubNub SDK for JavaScript. Publish/subscribe messaging over HTTP long-poll with server-assigned message ordering, channel occupancy via Here Now, and message history through Message Persistence.
• @solid-primitives/websocketPrimitive to create a web socket connection
• @sanity/access-uiShared request-access screen and access-request logic for Sanity applications
• @telnyx/webrtcTelnyx WebRTC Client
• @anycable/webAnyCable JavaScript client for web
• @tanstack/ai-clientFramework-agnostic headless client for TanStack AI chat, realtime sessions, streaming transports, and media generations.
• eventsource-clientModern EventSource client for browsers and Node.js
• @liveblocks/react-uiA set of React pre-built components for the Liveblocks products. Liveblocks is the all-in-one toolkit to build collaborative products like Figma, Notion, and more.
• @sanity/validationDocument validation for Sanity schemas
• websocket-streamUse websockets with the node streams API. Works in browser and node
• @daily-co/daily-reactDaily React makes it easier to integrate [@daily-co/daily-js](https://www.npmjs.com/package/@daily-co/daily-js) in React applications.
• @tanstack/ai-reactReact hooks for TanStack AI streaming chat, realtime voice, structured outputs, and media generation.
• rivetkitLightweight libraries for building stateful actors on edge platforms
• paho-mqttEclipse Paho JavaScript MQTT client for Browsers
• @tanstack/ai-openaiOpenAI adapter for TanStack AI chat, tools, images, video, speech, transcription, realtime, and structured outputs.
• @feathersjs/feathersA framework for real-time applications and REST API with JavaScript and TypeScript
• @n1ru4l/graphql-live-query[](https://www.npmjs.com/package/@n1ru4l/graphql-live-query) [](https://www.npmjs.com/package/@n1ru4l/
• sip.jsA SIP library for JavaScript
• @nktkas/rewsDrop-in WebSocket replacement with automatic reconnection.

• ws vs sockjs
• ws vs sockjs-client
• @copilotkit/aimock vs mock-socket
• partysocket vs reconnecting-websocket