Amazon has just acquired ClusterK Inc., a startup company that lets other companies save up to 90 percent on Amazon web services EC2 spot clusters.

Amazon, the world's biggest provider of cloud infrastructure for running applications, reportedly made the acquisition on Wednesday, for $20-50 million, Marc Parrish, a ClusterK investor confirmed to VentureBeat.

ClusterK is hardly a rival to Amazon. The company helps customers use a cheaper AWS product instead of a more expensive one. According to SiliconAngle, the company offers a software as a service (SaaS) platform, which permits high availability in the AWS spot market, with subsequent savings. Consumers are allowed to name their price for compute capacity in the EC2 (Elastic Compute Cloud) spot market, and ClusterK assists in this with the main goal of optimizing the process for the lowest possible prices.

ClusterK's service allows rollouts across several spot slices in multiple markets and offensively rebalances client applications, optimizing infrastructure for performance, availability and the lowest cost.

At the same time, reports state that Amazon has also acquired other startups including Amiato and 2lemetry.

ClusterK's Parrish further said that the team will relocate and work at Amazon's headquarters in Seattle. He expects that ClusterK founder and chief executive Dmitry Pushkarev will have a prominent role at AWS.

ClusterK was established in 2013 in Palo Alto, Calif.