What Is Amazon EventBridge?
Amazon EventBridge is a serverless event bus service for building event-driven applications. It connects AWS services, integrated SaaS partners, and custom apps by routing events to targets like Lambda or Step Functions, with schema registry and filtering support.
Background
- Amazon EventBridge is AWS's managed serverless event bus service, which lets applications react to events (state changes) from AWS services, third-party SaaS apps (e.g., Shopify, Datadog, Zendesk), and custom applications.
- EventBridge replaced and extends Amazon CloudWatch Events; it provides an "event router" that decouples event producers from consumers using rules that filter events and route them to targets like AWS Lambda, Step Functions, SQS, SNS, and Kinesis.
- "Schema registry" automatically discovers and stores event structure (schema) to help developers write code that correctly processes events; "schema evolution" tracks changes over time.
- Key use cases: building event-driven architectures, automating responses (e.g., auto-remediate EC2 state changes), integrating SaaS tools without custom API polling, and triggering workflows based on scheduled or recurring events.
- Pricing: pay per million events matched to a rule; no upfront fees; the free tier covers 100M events/month per account.