Protocol Comparison
Compare WebSocket, SSE, and WebTransport side by side
WebTransport Status
Checking browser support...
WebSocket
TCP
Disconnected
Messages
0
Avg Latency
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Server-Sent Events
HTTP
Disconnected
Messages
0
Avg Latency
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WebTransport BETA
QUIC
Disconnected
Messages
0
Avg Latency
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| Feature | WebSocket | SSE | WebTransport |
|---|---|---|---|
| Direction | Bidirectional ↔️ | Server → Client → | Bidirectional ↔️ |
| Protocol | TCP (WebSocket) | HTTP (chunked) | UDP (QUIC/HTTP/3) |
| Typical Latency | 1-5ms | 10-50ms | 0.5-2ms |
| Auto-reconnect | ✗ Manual | ✓ Native | ✗ Manual |
| Multiple Streams | ✗ 1 stream | ✗ 1 stream | ✓ Multiple |
| Datagrams (UDP-like) | ✗ | ✗ | ✓ |
| Browser Support | ✓ Universal | ~ No IE | ~ Chrome/Firefox only |
| Proxy/Firewall | ~ May block | ✓ HTTP works | ✗ Often blocked |