Event Grid – Azure’s event delivery service.
Azure Event Grid is a serverless event routing service that enables event-driven architectures. It supports both custom topics and system events from Azure services, with built-in filtering capabilities. Event Grid features retry policies, dead-lettering, and webhook validation for event handlers. The service includes custom event schemas, batching support, and integration with Azure Functions and Logic Apps. It provides reliable event delivery with at-least-once guarantees and supports various authentication methods.