The Apache Druid (incubating) Kafka indexing service offers exactly once consumption guarantees from Kafka. The Kafka indexing service is a native Kafka consumer that streams data from Kafka topics and writes to Druid.
This service is a part of core Druid and runs natively as a part of Druid’s ingestion process. Apache Druid (incubating) is a high-performance analytics data store to store and query large volumes of real-time, complex, event-driven, operational data. Imply, the original developer of the Kafka indexing service, is the enterprise version of Druid with additional capabilities for data loading, management, security, and visualization.