Socket.IO vs. WebSocket: Key differences and which to use
ably.com · 1,310 words · saved by 1 readers
We compare Socket.IO with WebSocket. Discover how they are different, their pros & cons, and their use cases.
On this page Topics / Protocols & Protocols / Socket.IO vs. WebSocket 5 min read • Last updated Updated May 15, 2025 Socket.IO vs WebSocket: Performance, features & scale tradeoffs Copy link to clipboard Introduction: Socket.IO and WebSocket aren’t apples-to-apples WebSocket is a browser-native protocol for full-duplex communication over a single TCP connection. Socket.IO is a JavaScript library that builds on top of WebSocket and fallback transports. Though often compared, they serve different purposes and offer distinct tradeoffs when you're building large-scale, low-latency realtime systems
related reading
- the-websocket-handbook.pdfpages.ably.com
- How it works | Socket.IOsocket.io
- Mediumcodeburst.io
- What Server-Sent Events is - and how and when to implement it | Ably Realtimeably.com
- WebSockets, caution required!samsaffron.com
- Realtime with serverless using Websocket in AWSunimedia.tech
- The new wave of Javascript web frameworksfrontendmastery.com
- What, Why and How | WebRTC for the Curiouswebrtcforthecurious.com
- Serverless Framework - AWS Lambda Events - Websocket | Serverless Frameworkserverless.com
- Serverless Framework - AWS Lambda Events - Websocket | Serverless Frameworkserverless.com
- PartyKit - Turn everything into a realtime multiplayer apppartykit.io
- Using API Gateway WebSockets with the Serverless Framework | Serverless Frameworkserverless.com