Palo Alto, Calif.
Top Executive: Michael Olson, CEO
Cloudera is perhaps the most established of the young Hadoop-focused companies. The company offers a commercial distribution of the Apache Hadoop software, as well as Cloudera Enterprise, a subscription service that includes support and a portfolio of software called the Cloudera Management Suite. In an example of how Cloudera's technology is finding its way into broad use, Oracle said in January that it had integrated Cloudera's distribution of Hadoop and Cloudera Manager with the Oracle Big Data Appliance.