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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
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