Azure Event Hubs is a real-time, highly scalable, and fully managed data-stream ingestion service. As the on-ramp for stream processing in the cloud, Event Hubs enables publish-subscribe data distribution in a flexible platform-as-as-service (PaaS) model that can scale with your needs and provide a durable buffer between event publishers and event consumers.
Preview pricing for Event Hubs remains in place through November 30, 2014. General availability pricing applies starting December 1, 2014.
For more information, please visit the Event Hubs
page. For comprehensive pricing information, please visit the Event Hubs Pricing Details