A software as a service (SaaS) platform is an application that can be accessed online and hosted by a vendor, who provides the infrastructure and scalability for the software. SaaS platforms can be built on top of public cloud computing services, such as Amazon Web Services (AWS), Microsoft Azure or Google Cloud Platform, or they can run on private cloud systems.
SaaS platforms typically provide a subscription model for businesses to access their software, which comes with regular updates and new features. The subscription allows companies to pay for what they use without having to worry about managing servers and infrastructure.