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.

• agora-rtc-sdk-ngAgora WebRTC SDK for JavaScript
• @liveblocks/yjsIntegrate your existing or new Yjs documents with Liveblocks.
• socketcluster-clientSocketCluster JavaScript client
• ccxtA cryptocurrency trading API with more than 100 exchanges in JavaScript / TypeScript / Python / C# / PHP / Go
• retell-client-js-sdkBrowser SDK for Retell voice calls: start a web call with an agent, or monitor an ongoing call.
• @socket.io/redis-streams-adapterThe Socket.IO adapter based on Redis Streams, allowing to broadcast events between several Socket.IO servers
• react-vncA React Component to connect to a websockified VNC client using noVNC.
• h264-profile-level-idTypeScript utility to process H264 profile-level-id values
• @elevenlabs/react-nativeElevenLabs React Native SDK for the Agents Platform
• @twilio/video-processorsTwilio Video Processors JavaScript Library
• @livekit/noise-cancellation-nodeLivekit plugin for noise cancellation of inbound AudioStream for NodeJS
• jssipThe Javascript SIP library
• @dynamic-labs-wallet/forward-mpc-clientWebSocket client for Forward MPC operations
• actioncableWebSocket framework for Ruby on Rails.
• vitest-websocket-mockMock websockets and assert complex websocket interactions with Vitest
• @cloudamqp/amqp-clientAMQP 0-9-1 client for RabbitMQ, LavinMQ and other AMQP brokers, both for browsers (WebSocket) and node (TCP Socket)
• node-datachannelWebRTC For Node.js and Electron. libdatachannel node bindings.
• primusPrimus is a simple abstraction around real-time frameworks. It allows you to easily switch between different frameworks without any code changes.
• mediasoup-clientmediasoup client side TypeScript library
• @opentok/clientThe OpenTok.js library lets you use OpenTok-powered video sessions on the web
• @stomp/rx-stompRxJS STOMP client for Javascript and Typescript
• @veltdev/typesVelt is an SDK to add collaborative features to your product within minutes. Example: Comments like Figma, Frame.io, Google docs or sheets, Recording like Loom, Huddles like Slack and much more.
• meteor-node-stubsStub implementations of Node built-in modules, a la Browserify
• @veltdev/reactVelt is an SDK to add collaborative features to your product within minutes. Example: Comments like Figma, Frame.io, Google docs or sheets, Recording like Loom, Huddles like Slack and much more.
• @microsoft/agent-host-protocolTypeScript client for the Agent Host Protocol (AHP).
• event-reduce-jsjavascript implementation of the event-reduce algorithm https://pubkey.github.io/event-reduce/
• rxdbA local-first realtime NoSQL Database for JavaScript applications - https://rxdb.info/
• mixed-signalsRPC Reflection for Preact Models & Signals: use Models/Signals from a somewhere else (server/worker/etc) as if they were here.
• @colyseus/coreMultiplayer Framework for Node.js.
• @colyseus/sdkColyseus Multiplayer SDK for JavaScript/TypeScript
• vue-qrcode-readerA set of Vue.js components for detecting and decoding QR codes.
• @colyseus/ws-transport```typescript import { Server } from "@colyseus/core"; import { WebSocketTransport } from "@colyseus/ws-transport";
• @liveblocks/react-tiptapAn integration of TipTap + React to enable collaboration, comments, live cursors, and more with Liveblocks.
• @slack/rtm-apiOfficial library for using the Slack Platform's Real Time Messaging API
• @messagebird/sdkThe official TypeScript SDK for the Bird API: email, SMS, WhatsApp, verification, and Realtime on one typed client.
• @speechmatics/real-time-clientClient for the Speechmatics real-time API
• tiktok-live-connectorTikTok LIVE API for Node.js: The #1 library for real-time chat, gift, like, follow and viewer events from any TikTok livestream.
• @openuidev/react-headlessHeadless React primitives for AI chat — state management, streaming adapters for OpenAI, Vercel AI SDK, and AG-UI, message format converters, and thread management for OpenUI generative UI apps
• mediasoupCutting Edge WebRTC Video Conferencing
• nats.wsWebSocket NATS client
• @daily-co/react-native-webrtcDaily fork of WebRTC for React Native
• @socket.io/admin-uiAdmin UI for Socket.IO
• @openreplay/tracker-assistTracker plugin for screen assistance through the WebRTC
• @standard-server/sharedInternal types and utilities shared across the Standard Server ecosystem
• @standard-server/coreThe Standard Server contract: transport-agnostic request, response, body, and streaming types with body parsing rules, runtime validators, and SSE helpers shared by every adapter
• @standard-server/fetchFetch API adapter for Standard Server: transport-agnostic requests, responses, and streaming for browsers, workers, Deno, Bun, and any Fetch-based runtime
• @standard-server/peerMessage-based adapter for Standard Server: transport-agnostic requests, responses, and streaming over WebSocket, MessagePort, and custom peer transports
• @standard-server/nodeNode.js HTTP and HTTP/2 adapter for Standard Server: transport-agnostic requests, responses, and streaming on top of IncomingMessage and ServerResponse
• @standard-server/fastifyFastify adapter for Standard Server: transport-agnostic requests, responses, and streaming on top of Fastify's request and reply objects
• gunA realtime, decentralized, offline-first, graph data synchronization engine.

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