Differences between IaaS, PaaS, and SaaS

• IaaS: Provides a VM environment up to the point before OS installation.
• PaaS: Configures an operating environment that developers can use.
• SaaS: Provides a complete environment that users can use immediately.

IaaS (Infrastructure as a Service) #

• A service that provides infrastructure level (VM Hosting)
• Users receive and utilize IT resources, such as servers, storage, and databases, required to build systems or services, in a service-oriented manner.
• The approach used by Amazon's EC2 (Amazon Elastic Compute Cloud) service

PaaS (Platform as a Service) #

• A cloud service that provides a platform and environment for developers to write applications.
• Users receive and utilize the execution environment where application services run, in a service-oriented manner.
  • A method where software like node.js and Java is pre-configured, allowing users to deploy their source code and have it immediately become a service.
• Users do not need to consider OS, Server H/W, Network, etc.
• The approach used by Microsoft Azure Platform service

SaaS(Software as a Service) #

• Users access applications like email and word processors over a network.
• A method of receiving software as a service.
• Everything is managed by the software provider.