Public Cloud Services Market Totaled $312 Billion in 2020

The worldwide public cloud services market, including Infrastructure as a Service (IaaS), System Infrastructure Software as a Service (SISaaS), Platform as a Service (PaaS), and Software as a Service (SaaS), grew 24.1% year over year in 2020 with revenues totaling $312 billion, according to IDC.

Spending continued to consolidate in 2020 with the combined revenue of the top 5 public cloud service providers (Amazon Web Services, Microsoft, Salesforce.com, Google, and Oracle) capturing 38% of the worldwide total and growing 32% year over year. Thanks to an expanding portfolio of SaaS and SISaaS offerings, Microsoft now shares the top position with Amazon Web Services in the whole public cloud services market with both companies holding 12.8% revenue share for the year.

While the overall public cloud services market grew 24.1% in 2020, consistent with the past four years, the IaaS and PaaS segments have consistently grown at much faster rates. This highlights the increasing reliance of enterprises on a cloud foundation built on cloud infrastructure, software defined data, compute and governance solutions as a Service, and cloud-native platforms for application deployment for enterprise IT internal applications. IDC expects spending on foundational cloud services (especially IaaS and PaaS) to continue growing at a higher rate than the overall cloud market as resilience, flexibility, and agility guide IT platform decisions.

Looking at the segment results, a combined view of IaaS, SISaaS, and PaaS spending is relevant because it represents the foundational set of services that end customers and SaaS companies consume when running, modernizing, building, and governing applications on shared public clouds. In the combined IaaS, SISaaS and PaaS market, the top 5 companies (Amazon Web Services, Microsoft, Google, Alibaba, and IBM) captured over 51% of global revenues. But there continues to be a healthy long tail, representing nearly half the market total. These are companies with targeted use case-specific PaaS services or cross-cloud compute, data, or network governance services. The long tail is even more pronounced in SaaS, where customers growing focus on specific outcomes ensures that over two thirds of the spending is captured outside the top 5.