AWS adds a shared custom EventBridge bus for multiple accounts

The update gives large teams one bus with ordering, retention, replay and deduplication built in, while keeping subscriptions and failure handling separate by team.

AWS has launched an enhanced Custom Event Bus for Amazon EventBridge that lets one bus serve multiple AWS accounts, aiming to simplify enterprise event architectures while adding native ordering, retention, replay, deduplication, and a new cost model. The bus can be shared through AWS Resource Access Manager, supports up to 10,000 subscribers by default, and lets platform teams centralize governance while application teams manage their own subscriptions, retries, targets, and failure handling. AWS also added synchronous invocation for targets like Lambda and a new Subscriber resource that bundles filtering, routing, retries, dead-letter destinations, and variable start times into one consumer definition. Event retention is configurable from one to 365 days, and content-based deduplication can collapse matching events that arrive within a five-minute window. The enhanced bus is available now in selected regions across North America, Europe, and Asia Pacific, while existing custom buses continue as Custom event bus-classic.