Software as a Service (SaaS) will remain the dominant cloud computing type, capturing more than two thirds of all public cloud spending through most of the forecast period. Worldwide spending on Infrastructure as a Service (IaaS) and Platform as a Service (PaaS) will grow at a faster rate than SaaS with five-year CAGRs of 27.0 percent and 30.6 percent, researchers said.
From a company size perspective, large and very large companies will be the primary driver of worldwide public cloud services with spending of more than USD 80 billion in 2019. However, small and medium businesses (SMBs) will remain a significant contributor to overall spending with more than 40 percent of the worldwide total throughout the forecast period coming from companies with fewer than 500 employees.
The industries with the largest public cloud services expenditures in 2015 were discrete manufacturing at USD 8.6 billion, followed by banking and professional services at USD 6.8 billion and USD 6.6 billion. In terms of public cloud services expenditures in 2015, telecommunications was the second largest industry in the Asia/Pacific region and is forecast to move into the top position by 2019. Telecommunications will be the fastest-growing vertical industry over the 2014-2019 forecast period with a worldwide CAGR of 22.2 percent, the research said.
