Karmasphere: Karmasphere is one of the first startups to build an analytic application atop Hadoop, and in its 2.0 release last year the company added support for SQL queries of data in HDFS. Like Hive, Karmasphere still relies on MapReduce to process queries, which means it’s inherently slower than newer approaches. However, unlike Hive, Karmasphere allows for parallel queries to run at the same time and includes a visual interface for writing queries and filtering results.