Saas - What is SaaS?

• Definition: Software as a Service (SaaS), a.k.a. ondemand software, is a software delivery model in which software and its associated data are hosted centrally and accessed using a thin-client, usually a web browser over the internet. – Wikipedia
  
• Simply put, SaaS is a method for delivering software that provides remote access to software as a webbased service. The software service can be purchased with a monthly fee and pay as you go.
• Where does the term SaaS come from?
  • The SAAS acronym allegedly first appeared in an article called "Strategic Backgrounder: Software As A Service", internally published in February 2001 by the Software & Information Industry’s eBusiness Division
• Multi-tenant architecture
  • Virtualization as a alternative
• Pricing model
  • pay as we go, relatively low cost for user provisioning
• Configuration and customization
  • Easy for application customization
• Accelerated feature delivery
  • It means a much shorter release cycle
• Open integration protocols
  • Typically based on HTTP, JSON,REST, SOAP