MQTT vs AMQP: Which Messaging Protocol?
MQTT is a lightweight publish/subscribe protocol built for constrained IoT devices; AMQP is a feature-rich protocol for reliable enterprise messaging.
MQTT minimizes overhead for low-bandwidth, high-latency networks and constrained devices, with simple topic-based pub/sub and quality-of-service levels. AMQP offers rich routing via exchanges and queues, transactions, and strong reliability for enterprise integration. MQTT wins on footprint and IoT fit; AMQP wins on routing power and enterprise messaging features.
| MQTT | AMQP | |
|---|---|---|
| Focus | IoT / constrained | Enterprise messaging |
| Overhead | Very low | Higher |
| Routing | Topics (simple) | Exchanges (rich) |
| Reliability | QoS 0/1/2 | Acks, transactions |
| Best for | Devices, telemetry | Enterprise integration |
Use case and footprint
MQTT suits telemetry from many constrained devices over unreliable networks, where small packets and simple topics matter. AMQP suits enterprise systems needing flexible routing, guaranteed delivery, and transactional semantics.
Ops and CI fit
MQTT brokers are light; AMQP brokers like RabbitMQ are fuller-featured. Both protocols are validated in CI against ephemeral brokers, where faster managed runners shorten broker startup and protocol-conformance tests.
The verdict
Want lightweight IoT/device telemetry: MQTT. Want rich routing and reliable enterprise messaging: AMQP. Device footprint favors MQTT; routing and reliability favor AMQP.