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Amazon EventBridge alternatives: Azure, Google Cloud and open source

EventBridge lets one part announce, without knowing who listens.

The service that turns a pile of components into something you can extend without editing what already works.

  • From my own projects
  • Sources linked
  • Updated September 2026

The same job on four platforms

The same task, a different bill and a different console. The layer does not change.

AWS

Amazon EventBridge[1]

EventBridge lets one part announce, without knowing who listens.

AWS documentation →[2]

Microsoft Azure

Azure Event Grid[3]

Official documentation →

Google Cloud

Eventarc[4]

Official documentation →

Pub/Sub (queue shape)[5]

Official documentation →

Open source / run it yourself

Apache Kafka[6]

Event streaming you run yourself, Apache 2.0. More than a bus, and more to operate.

NATS[7]

Lightweight messaging and events, Apache 2.0, CNCF project.

What Amazon EventBridge does

You sendAn event, published to a bus
Amazon EventBridge

EventBridge lets one part announce, without knowing who listens.

You get backThat event, delivered to every rule that matches it
What it costsPer million events. Nothing in between.
Who operates itAWS runs the bus and the delivery guarantees. The event schema is yours, and it is the part that ages.
When it is the wrong choiceWhen two components already know about each other. An event bus between them adds a hop and a mystery.

AWS calls it: “Build event-driven applications at scale across AWS, existing systems, or SaaS applications”[1]

How I use it

Scheduling and routing between pipeline steps. It is how a finished clip announces itself without the pipeline knowing who publishes it.

AI use cases on AWS →All AWS services in my projects →
Linda Mohamed

Linda Mohamed, AI and cloud consultant and AWS Community Hero in Vienna. I build these pipelines for clients and teach them at FH Burgenland.

Read more on ai-solutions.wiki

My open knowledge base, with longer comparisons and more sources.

Questions

What is the Azure equivalent of Amazon EventBridge?

Azure Event Grid.

What is the Google Cloud equivalent of Amazon EventBridge?

Eventarc; Pub/Sub (queue shape).

What is the open-source alternative to Amazon EventBridge?

Apache Kafka: Event streaming you run yourself, Apache 2.0. More than a bus, and more to operate. NATS: Lightweight messaging and events, Apache 2.0, CNCF project.

How is Amazon EventBridge billed?

Per million events. Nothing in between.

When should you not use Amazon EventBridge?

When two components already know about each other. An event bus between them adds a hop and a mystery.

Sources

  1. Amazon EventBridge product page. https://aws.amazon.com/eventbridge/
  2. Amazon EventBridge documentation. https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-what-is.html
  3. Azure Event Grid documentation. https://learn.microsoft.com/en-us/azure/event-grid/overview
  4. Eventarc documentation. https://cloud.google.com/eventarc/docs
  5. Pub/Sub (queue shape) documentation. https://cloud.google.com/pubsub/docs
  6. Apache Kafka. https://kafka.apache.org/
  7. NATS. https://nats.io/
  8. Amazon EventBridge: Event-Driven AI Orchestration, ai-solutions.wiki. https://ai-solutions.wiki/tools/amazon-eventbridge/
  9. Azure Event Grid: Serverless Event Routing, ai-solutions.wiki. https://ai-solutions.wiki/tools/azure-event-grid/
  10. Apache Kafka: Distributed Event Streaming Platform, ai-solutions.wiki. https://ai-solutions.wiki/tools/apache-kafka/
  11. Linda Mohamed, course slides “The projects”, MASE-3, FH Burgenland, September 2026.

Links checked September 2026. Product names and availability change: check the linked pages before you decide.

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