Difference between CoAP and MQTT Protocols

Comparison between CoAP and MQTT Protocols


  • The Key Difference between CoAP and MQTT Protocols are below the table.
COAP and MQTT Difference
COAP and MQTT Difference

Comparison Chart

1 CoAP stands for Constrained Application Protocol. MQTT stands for Message query telemetry transport.
2 CoAP uses the Request-Response model. MQTT uses the Publish-Subscribe model.
3 CoAP uses UDP protocol(User Datagram Protocol ). MQTT uses TCP protocol(Transmission Control Protocol).
4 The communication model is One-to-one. The communication model is Many-to-many.
5 The security type is DTLS(Datagram Transport Layer Security). The security type is SSL/TLS.
6 Effectiveness in LLN is excellent. Effectiveness in LLN is low.
7 Use both Asynchronous and Synchronous messages. Uses only Asynchronous messages.
8 C0AP header size 4 bytes. MQTT header size 2 bytes.

CoAP Advantages

  • Lightweight and fast
  • Low overhead
  • Support for multicasting

CoAP Disadvantages

  • Not as reliable as TCP based

MQTT Advantages

  • Simple management
  • Scalability
  • Robust communication

MQTT Disadvantages

  • Higher overhead, no multicasting MQTT support

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