juniorAzure Service Bus
What is Azure Service Bus and when should you use it?
Updated Apr 23, 2026
Short answer
Azure Service Bus is a fully managed message broker used for reliable communication between distributed applications using queues and topics.
Deep explanation
Azure Service Bus enables decoupled communication between services. Instead of services calling each other directly, they communicate via messages. It supports queues (point-to-point) and topics (publish/subscribe). It guarantees message delivery, supports transactions, dead-lettering, duplicate detection, and ordering. It is ideal for microservices, event-driven systems, and enterprise integrations.
Real-world example
An e-commerce app uses Service Bus to send order messages from frontend to backend processing service.
Common mistakes
- Using Service Bus for real-time streaming instead of Event Hub
- not handling message retries.
Follow-up questions
- Service Bus vs Event Hub?