Amazon EventBridge
- What it is
- Serverless event bus. Routes events from AWS services, your own applications, and SaaS partners to targets, based on rules.
- The successor to and superset of CloudWatch Events.
- What makes it different
- Content-based filtering — rules match on the JSON body of the event, not just a topic name.
- Schema registry — discovers event structures and generates code bindings.
- Partner event sources — Zendesk, Datadog, Shopify, and others publish directly into your bus.
- Scheduler — cron/rate expressions to trigger targets on a schedule.
- Not to be confused with
- Amazon Simple Notification Service (SNS) — a topic broadcasts to all subscribers; filtering is coarse. EventBridge routes selectively on event content.
- Amazon Simple Queue Service (SQS) — a durable buffer, not a router.
- AWS Step Functions — orchestrates a defined sequence of steps; EventBridge reacts to events with no workflow state.
- Exam signal
- “React to events across AWS services / SaaS”, “event-driven architecture”, “scheduled trigger” → EventBridge.