Azure event routing service that connects event sources to event handlers. Like a smart mail sorting system that automatically delivers messages to the right recipients.
When files are uploaded to Azure Storage, Event Grid automatically triggers processing functions and notifications.
All are managed event routing services that deliver events from sources to targets using rules/filters. Azure Event Grid focuses on Azure resource events and custom topics; AWS EventBridge adds a central event bus and many SaaS integrations; GCP Eventarc routes events (often via Cloud Audit Logs and Pub/Sub) to Cloud Run/Functions; OCI Events routes OCI resource events to services like Functions and Notifications.