Question 1

What's the difference between Azure Event Grid and Azure Service Bus?

Accepted Answer

Event Grid is for event notifications ("something happened"), optimized for pushing events from many Azure services to handlers with filtering and fan-out. Service Bus is a message broker for commands and reliable messaging between applications ("do this"), with features like queues/topics, message sessions, and more explicit sender/receiver coordination. Use Event Grid for reactive integrations; use Service Bus when you need durable messaging, ordering patterns, or complex messaging workflows.

Question 2

When should I use Event Grid?

Accepted Answer

Use Event Grid when you want to react to events from Azure services or your own apps—like blob created, resource changed, or custom business events—and route them to multiple consumers (Functions, Logic Apps, Webhooks, Service Bus, etc.). It’s a good fit for loosely coupled architectures, fan-out notifications, and lightweight event-driven automation. If you need long-running workflows, consider pairing it with Logic Apps or Durable Functions; if you need command-style messaging with advanced broker features, consider Service Bus.

Question 3

How much does Event Grid cost?

Accepted Answer

Event Grid pricing is primarily based on the number of operations (such as event deliveries and management operations). Costs increase with higher event volume, advanced features you enable (for example, certain delivery options), and any downstream services you trigger (Functions, Logic Apps, Service Bus, etc.). For accurate numbers, estimate monthly event count and review the current Azure Event Grid pricing page for your region.

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