Explain the websocket vs SSE.
Explain the websocket vs SSE with example.
Ravi Vishwakarma is a dedicated Software Developer with a passion for crafting efficient and innovative solutions. With a keen eye for detail and years of experience, he excels in developing robust software systems that meet client needs. His expertise spans across multiple programming languages and technologies, making him a valuable asset in any software development project.
Anubhav Kumar
13-Jan-2026Below is a clear, interview-ready, deep comparison.
1. What is WebSocket?
WebSocket provides a full-duplex (two-way) communication channel over a single persistent TCP connection.
ws://orwss://Typical Use Cases
2. What is Server-Sent Events (SSE)?
SSE allows the server to push data to the client, but communication is one-way.
text/event-streamEventSourceTypical Use Cases
3. Core Differences (Quick Table)
4. Communication Flow
WebSocket Flow
SSE Flow
5. Code Examples
WebSocket (Client)
SSE (Client)
6. Performance & Resource Usage
WebSocket
SSE
7. Security
8. When to Use What?
Choose WebSocket when:
Choose SSE when:
9. SSE Limitations (Important)
10. Interview One-Line Answer