Generally, cloud computing services are categorized into three types.

1) Infrastructure as a Service (IaaS): This service provides the infrastructure like Servers, Operating Systems, Virtual Machines, Networks, and Storage etc on rent basis.

Eg: Amazon Web Service, Microsoft Azure

2) Platform as a Service (PaaS): This service is used in developing, testing and maintaining of software. PaaS is same as IaaS but also provides the additional tools like DBMS, BI services etc.

Eg: Apprenda, Red Hat OpenShift

3) Software as a Service (SaaS): This service makes the users connect to the applications through the Internet on a subscription basis.