--- title: Introducing enhanced custom event buses in Amazon... description: Amazon EventBridge now offers an enhanced custom event bus designed for organizations scaling event-driven applications across multiple teams and AWS accounts.... canonical: https://daily.dev/posts/introducing-enhanced-custom-event-buses-in-amazon-eventbridge-for-enterprise-scale-event-driven-appl-xeruwr81i twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Introducing enhanced custom event buses in Amazon EventBridge for enterprise-scale event-driven applications | daily.dev og:description: Amazon EventBridge now offers an enhanced custom event bus designed for organizations scaling event-driven applications across multiple teams and AWS accounts.... og:url: https://daily.dev/posts/introducing-enhanced-custom-event-buses-in-amazon-eventbridge-for-enterprise-scale-event-driven-appl-xeruwr81i og:image: https://api.daily.dev/og/posts/XeruWr81i.png og:image:alt: Introducing enhanced custom event buses in Amazon EventBridge for enterprise-scale event-driven applications og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Introducing enhanced custom event buses in Amazon EventBridge for enterprise-scale event-driven applications **[AWS](https://daily.dev/sources/aws)** · 7 min read · 0 upvotes · 0 comments ## Summary Amazon EventBridge now offers an enhanced custom event bus designed for organizations scaling event-driven applications across multiple teams and AWS accounts. A single, centralized bus can be shared org-wide via AWS RAM, eliminating cross-account rules and bus-to-bus routing. New features include ordering guarantees via EventGroupId, synchronous Lambda invocation, a unified Subscriber resource combining filtering, targets, retries, and dead-letter destinations, content-based deduplication for exactly-once semantics, JSONata-based event reshaping, Avro/Protobuf deserialization, and a new ingress/egress throughput pricing model replacing per-event charges. Existing buses remain unchanged as Custom event bus – classic. The enhanced bus is available in a specified set of AWS regions and can be created via console, CLI, or API. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is the difference between the new EventBridge enhanced custom event bus and the classic custom event bus? The enhanced custom event bus supports a single bus shared across all AWS accounts in an organization via AWS RAM, with ordering guarantees through EventGroupId, a unified Subscriber resource replacing separate rules and targets, content-based deduplication, and a new ingress/egress throughput pricing model. Classic custom event buses remain available unchanged, still using rules and targets with per-event pricing and no built-in ordering. _daily.dev helps architects compare EventBridge bus options before committing to a multi-account event design._ ### How does EventBridge guarantee event ordering with the enhanced custom event bus? Publishers include an EventGroupId when sending events, and EventBridge delivers events sharing the same EventGroupId in sequence to Subscribers that opt into ordered delivery, while other subscribers on the same bus can still receive the events without ordering. It also supports synchronous invocation for targets like AWS Lambda, confirming processing before acknowledging the event, removing the need for an SQS buffer for reliability. _Teams designing ordered event pipelines can track EventBridge updates like this on daily.dev._ ### How is pricing structured for the new EventBridge enhanced custom event bus? Pricing uses an ingress and egress throughput model: publishers pay for events ingested and subscribers pay for events delivered, replacing the per-event pricing model where cross-account and bus-to-bus routing charges previously compounded in multi-bus architectures. Full details are published on the EventBridge pricing page. _daily.dev keeps cost-conscious engineers current on cloud pricing changes like this EventBridge shift._ ## Similar posts on daily.dev - [Amazon EventBridge relaunches event buses for enterprise scale](https://daily.dev/posts/amazon-eventbridge-relaunches-event-buses-for-enterprise-scale-cxxyfmhhx) · AWS · 0 upvotes · 0 comments - [Event-Driven Architecture with Spring Boot and AWS EventBridge: Escaping the Distributed Monolith](https://daily.dev/posts/event-driven-architecture-with-spring-boot-and-aws-eventbridge-escaping-the-distributed-monolith-vut2syvqf) · Sergio Lema · 49 upvotes · 0 comments - [Amazon EventBridge introduces enhanced visual rule builder](https://daily.dev/posts/amazon-eventbridge-introduces-enhanced-visual-rule-builder-rhwcxqulk) · AWS · 1 upvotes · 0 comments - [Reducing Onboarding From 48 Hours to 4: Inside Amazon Key’s Event-Driven Platform](https://daily.dev/posts/reducing-onboarding-from-48-hours-to-4-inside-amazon-key-s-event-driven-platform-vwaza59ha) · InfoQ · 54 upvotes · 0 comments - [Announcing increased 1 MB payload size support in Amazon EventBridge](https://daily.dev/posts/announcing-increased-1-mb-payload-size-support-in-amazon-eventbridge-29ymfran0) · AWS · 0 upvotes · 0 comments --- Tags: [#aws](https://daily.dev/tags/aws), [#architecture](https://daily.dev/tags/architecture), [#serverless](https://daily.dev/tags/serverless), [#aws-lambda](https://daily.dev/tags/aws-lambda) [View this post on daily.dev](https://daily.dev/posts/introducing-enhanced-custom-event-buses-in-amazon-eventbridge-for-enterprise-scale-event-driven-appl-xeruwr81i) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Introducing enhanced custom event buses in Amazon EventBridge for enterprise-scale event-driven applications","url":"https://daily.dev/posts/introducing-enhanced-custom-event-buses-in-amazon-eventbridge-for-enterprise-scale-event-driven-appl-xeruwr81i","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/introducing-enhanced-custom-event-buses-in-amazon-eventbridge-for-enterprise-scale-event-driven-appl-xeruwr81i"},"datePublished":"2026-09-24T22:01:45.685Z","dateModified":"2026-09-24T22:02:11.661Z","description":"Amazon EventBridge now offers an enhanced custom event bus designed for organizations scaling event-driven applications across multiple teams and AWS accounts....","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/d6382f21ee905a36302db634308d6342?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/d6382f21ee905a36302db634308d6342?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"AWS","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"AWS","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/aws","url":"https://daily.dev/sources/aws"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/introducing-enhanced-custom-event-buses-in-amazon-eventbridge-for-enterprise-scale-event-driven-appl-xeruwr81i","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"aws,architecture,serverless,aws-lambda","timeRequired":"PT7M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"AWS","item":"https://daily.dev/sources/aws"},{"@type":"ListItem","position":3,"name":"Introducing enhanced custom event buses in Amazon EventBridge for enterprise-scale event-driven applications"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/introducing-enhanced-custom-event-buses-in-amazon-eventbridge-for-enterprise-scale-event-driven-appl-xeruwr81i#faq","mainEntity":[{"@type":"Question","name":"What is the difference between the new EventBridge enhanced custom event bus and the classic custom event bus?","acceptedAnswer":{"@type":"Answer","text":"The enhanced custom event bus supports a single bus shared across all AWS accounts in an organization via AWS RAM, with ordering guarantees through EventGroupId, a unified Subscriber resource replacing separate rules and targets, content-based deduplication, and a new ingress/egress throughput pricing model. 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