The public cloud infrastructure-as-a-service (IaaS) market grew 26.1% in 2022 to $112.6 billion. Amazon Web Services (AWS) remains the market share leader in the worldwide public cloud infrastructure-as-a-service market, at $54.7 billion, representing 48.6% of global market in 2022. Microsoft, Alibaba, and Google are the next largest providers, with 14.5%, 6.2%, and 5.4% market shares, respectively. Overall, the top 4–5 vendors in the public cloud IaaS market continue to extend their share leads, as public cloud IaaS becomes increasingly difficult for new market entrants to penetrate.