The worldwide infrastructure as a service (IaaS) market grew 37.3% in 2019 to total $44.5 billion, up from $32.4 billion in 2018, according to Gartner, Inc. Amazon retained the No. 1 position in the IaaS market in 2019, followed by Microsoft, Alibaba, Google and Tencent.

Microsoft in 2018 became the market share leader for total off-premises cloud service revenue with 13.8 percent share, bumping Amazon to the #2 spot with 13.2 percent; IBM was #3 with 8.8 percent revenue share, according to IHS Markit. Microsoft’s success can be attributed to its comprehensive portfolio and the growth it is experiencing from its more advanced PaaS and CaaS offerings.