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MapR is a San Jose, California-based enterprise software company that develops and sells Apache Hadoop-derived software. The company contributes to Apache Hadoop projects like HBase, Pig (programming language), Apache Hive, and Apache ZooKeeper. MapR's Apache Hadoop distribution claims to provide full data protection, no single points of failure, improved performance, and dramatic ease of use advantages. MapR entered a technology licensing agreement with EMC Corporation on 25 May 2011, supporting an EMC-specific distribution of Apache Hadoop. MapR was selected by Amazon to provide an upgraded version of Amazon's Elastic Map Reduce (EMR) service. MapR has also been selected by Google as a technology partner. MapR was able to break the minute sort speed record on Google's compute platform.

MapR provides three versions of their product known as M3, M5 and M7. M3 is a free version of the M5 product with degraded availability features. M7 is like M5, but adds a purpose-built rewrite of HBase that implements the HBase API directly in the file-system layer.

In 2016, MapR launched an enhanced and integrated product called a "Converged Data Platform" which includes the MapR Streams, a pub-sub system, MapRDB, a complete no-sql document store and all the Hadoop ecosystem components integrated on the same distributed filesystem.

MapR is privately held with original funding of $9 million from Lightspeed Venture Partners and New Enterprise Associates since 2009. Key MapR executives come from Google, Lightspeed Venture Partners, Informatica, EMC Corporation and Veoh. MapR had an additional round of funding led by Redpoint in August, 2011. A C round was led by Mayfield Fund that also included Greenspring Associates as an investor. In June 2014, MapR closed a $110 million financing round that was led by Google Capital. Qualcomm Ventures also participated, along with existing investors Lightspeed Venture Partners, Mayfield Fund, New Enterprise Associates and Redpoint Ventures.