Look Who Made Gartner's Cloud Magic Quadrant

Leader: Dimension Data

Dimension Data bought OpSource in 2011 to enable it to enter the cloud IaaS market. It offers VMware-virtualized paid-by-the-VM, public cloud IaaS, as well as suggested-retail-price private cloud IaaS, with optional managed services.

Strengths: Dimension Data can compete against leading cloud providers with aggressive prices, while offering a reliable cloud service. It also has excellent SLAs, including 100 percent availability. It offers AWS API compatibility, as well as its own API, Garnter said.

Caution: The company is still integrating OpSource into its overall portfolio, and although Gartner said it does not foresee business disruptions, business risks remain as the OpSource brand is phased out.