Worldwide, in 2014, IDC has found that half of all companies (including all sizes of companies) were using at least one SaaS public cloud service, and a fifth were planning to implement one within the next year. The use of PaaS and IaaS were reportedly lower, at under 40% and just over 30% respectively. Statistics from OECD member countries in 2014 showed that cloud computing use varied with company size: among large companies it was higher (almost 40%) than among small (20%) or medium-sized enterprises (27%), although some experts expect that gap to close considerably in the coming years. Perhaps not surprisingly, the ICT sector and finance sectors were reported to have proportionately the most companies using the cloud (45%), followed by the professional, scientific sector and technical sector (27%). IDC also reports that the public sector use of the cloud lags behind the private sector, possibly due to security concerns and long-running contracts for traditional outsourcing, though public sector adoption is increasing.
IDC has also determined that cloud computing now represents a significant proportion of IT budgets when compared to traditional in-house or traditionally outsourced computing services, though it still accounts for less than half of total expenditures (see Figure 2). However IDC expects that the proportion of expenditure on cloud-based services will continue to increase with, for example, external cloud services growing from 42% of IT budgets in 2014 to more than 56% by 2016.
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