If you looked at just the database-market numbers, you would think NoSQL is barely a factor in the industry. As Matt Asay explains in an April 15, 2016, article on InfoWorld, the five most popular NoSQL vendors – MongoDB, DataStax (Cassandra), Basho, Couchbase, and MarkLogic – generated a combined $364 million in revenue in 2015. Add in the $323.2 million brought in collectively by Hadoop vendors Cloudera, Hortonworks, and MapR, and altogether, the vendors represented 3 percent of the overall paid DBMS market.