We are really happy to announce that we are reducing the prices for Azure HDInsight service and making several awesome capabilities generally available.
Launched in 2013, Azure HDInsight is a fully-managed, full spectrum, open-source analytics cloud service by Microsoft that makes it easy, fast, and cost-effective to process massive amounts of data. You can use the most popular open-source engines such as Hadoop, Spark, Hive, LLAP, Kafka, Storm, HBase, R and install more open source frameworks from the OSS ecosystem.

Read about it in the Azure blog.