Niche Player: Oracle Two years ago, Oracle's cloud made a debut on Gartner's Magic Quadrant as a Visionary. But last year, thanks to Gartner's modified evaluation criteria, Oracle dropped into Niche Player status, where it remains this year. Oracle Cloud Infrastructure, or OCI, was a second-generation service launched in 2016 to phase out the legacy offering, now referred to as Oracle Cloud Infrastructure Classic. The cloud offers both virtualized and bare-metal servers, with one-click installation and configuration of Oracle databases and container services. OCI appeals to customers with Oracle workloads that don't need more than basic IaaS capabilities. "OCI is best suited for enterprises requiring cloud IaaS for Oracle applications and for applications that require an Oracle Database," Gartner said. Strengths: The tech giant's cloud strategy relies on its applications, database and middleware, and spans the stack, from IaaS to PaaS to SaaS.