• Utility applications
• Ubiquitous line of business applications with no security concerns.
• Ex. Sales Force.com, Office 365, Google Apps.
The Software-as-a-Service provider owns the perpetual infrastructure and software delivery (refresh, repair, etc.) This allows you to pay only for the service that you are consuming in most cases. Some SaaS providers establish their licensing based on maximum potential use, which obligates the customer to pay for their peak usage. For some businesses the shift of IT spend from capital expenditure to operating expense enables new cash flow and liquidity opportunities that can materially impact the success of the business.
Elasticity: Elasticity is a hallmark of Software-as-a-Service, just as with IaaS and PaaS. However, while capacity may be elastic for most SaaS solutions, the pay-per-use model may not be. Some publishers will make you pay for X, and you don’t get to scale back on X if usage drops. It all depends on the agreement between your organization and the provider.
Management: SaaS offloads a significant amount of traditional work from internal resources to provider resources—even more so than hybrid clouds. This resource savings potentially can be reapplied to focus your IT organization on strategic business needs.
Mobility: Most Software-as-a-Service providers offer mobile application integration as part of their overall offering. The ability to deliver a mobile application experience has proven to be a high value accelerant for moving applications to SaaS providers.
Resilience: Most SaaS providers today offer highly advanced redundancy with uptime guarantees. Many variations of service resilience are available, so a thorough inspection will be necessary before committing to a financial agreement.
Flexibility: SaaS offers some flexibility, but only within the parameters established by the publisher.