Often referred to as NoSQL, non-relational databases feature elasticity and scalability. In addition, they can store big data and work with cloud computing systems. All of these factors make them extremely popular. In 2013, the number of NoSQL products reached 150 plus, and the figure is still growing. That variety makes it difficult to select just one. To make things worse, the abundance of marketing materials describing NoSQL products makes it hard to understand whether a particular solution will be useful for your use case. To choose the best NoSQL solutions for our customer’s projects, we at Altoros test them under varying types of workloads. This article overviews the results of the latest performance tests of some of the most mature and popular NoSQL data stores on the market.