Global public cloud infrastructure spending grows more than 40% in 2020 SHARE Public cloud infrastructure-as-a-service spending hit $64.3 billion in 2020, up 40.7% from the year before, as the COVID-19 pandemic pushed more companies to move computing workloads online, according to a report today from market research firm Gartner Inc. Amazon Web Services Inc. once again ranked as the top dog among IaaS public cloud services providers in terms of revenue, with Microsoft Corp. in second place and Alibaba Cloud, the cloud computing subsidiary of Alibaba Group Ltd., coming in third. Google LLC ranked fourth, and Huawei Technology Co. Ltd. raised eyebrows by coming in at fifth place in Gartner’s ranking.