IT Business Edge blogger Ann All says that despite a bad economy, software-as-a-service has done extremely well and is poised for strong growth. Gartner has reported that worldwide SaaS revenue is expected to hit $7.5 billion in 2009, a 17.7 percent increase over 2008 revenue of $6.4 billion. It also expects growth through 2013, with projections estimated at $14 billion-plus in revenue.
The promotion of platform-as-a-service (PaaS) capabilities, which allow companies to develop their own applications, has been a large growth factor.
The Knowledge Network has several SaaS resources and tools for those who have yet to explore SaaS. The first is a SaaS Checklist, a list of the important factors you should evaluate before jumping on the SaaS bandwagon. The second document is a SaaS vs. On Premise TCO Calculator,which can serve as a first step in determining whether the potential delta between the two approaches is large enough to warrant further investigation.
There is also a SaaS Primer for understanding and maximizing the value of SaaS solutions.