Application platform as a service (aPaaS)

What is Application Platform as a Service (aPaaS)?
Application platform as a service (aPaaS) or simply platform as a service (PaaS) is a cloud computing service model, together with Software as a Service (SaaS) and Infrastructure as a Service (IaaS). It provides end users with the hardware, operating systems, storage or network capacity they need via the cloud to run existing applications or develop new ones.

Products like EngineYard, VMForce and the Google App Engine Cloud all offer a PaaS. PaaS makes hosted software applications available with low entry costs or even free of charge. It simplifies the technical aspects of building and deploying applications by making it easier to maintain, scalable, and error-prone so users can focus on other things. PaaS offers many benefits to end users. For example, the operating system can be expanded and updated frequently, and geographically separated development teams can work together on software development projects in the cloud, and services can be accessed through different media and from anywhere in the world.

While PaaS has several advantages and advantages, there will always be some disadvantages. For one, PaaS carries some risk of vendor loyalty due to the inability of users to use their applications from one platform on another vendor's platform, especially if the platform requires exclusive service interfaces or specific languages. Another potential disadvantage is that the flexibility of the service may not meet the needs of some end users.