Azure Event Hub is used for telemetry and distributed data streaming. This service provides a single solution that enables rapid data retrieval for real-time processing as well as repeated replay of stored raw data. It can capture the streaming data into a file for processing and analysis. It has the following characteristics: low latency capable of receiving and processing millions of events per second at least once delivery Reference: https://docs.microsoft.com/en-us/azure/event-grid/compare-messaging-services