The global market for enterprise cloud-based services will grow from $12.1 billion in 2010 to $35.6 billion in 2015 (see Figure 1). The year-on-year growth rate will be 43% in 2011, but will decrease to 13% over the next five years. Software-as-a-service (SaaS) will account for 70% of revenue in 2010, while 30% will be related to infrastructure-as-a-service (IaaS). This revenue split will change over the next five years, as IaaS's share increases to 40%.

Figure 1: Enterprise cloud-based service revenue by sales channel, worldwide, 2015 [Source: Analysys Mason, 2010]

Analysys Mason's forecast, created as part of the Enterprise program, covers software-as-a-service (SaaS) and infrastructure-as-a-service (IaaS). It provides a five-year forecast of cloud services revenue worldwide, split into four business-size segments, four channels to market and eight geographical regions (see Figure 2).

Figure 2: Sub-categories in Analysys Mason's enterprise cloud services forecast [Source: Analysys Mason, 2010]