On the bases of access to clouds, they can be classified into following types.

Public Cloud: Cloud users are connected to internet and having access of cloud space easily. It offers of availability of cloud resources and follows the "Pay As You Go" model. The advantages of public cloud are cost effectives, reliability, high scalability, flexibility, and utility style costing and location independence. The disadvantages of public cloud are low security, less customizable and resources are shared publicly etc. The clients share the same virtual infrastructure with limited formation, security safeties, and availability adjustments.

Private Cloud: The specific and limited access in an organization or a particular group is called the private cloud. The main advantages are higher security and privacy, more control, improved reliability and cost and energy efficiency. But the scalability is more costly and area of operation is restricted. It is used highly price than public cloud.

Hybrid Cloud: The hybrid cloud is a combination of public and private cloud. The scalability, security, cost efficiency, flexibility and security services are provided to customers. This cloud is used partially public and private.

Community Cloud: The organization with common requirements share system and services from a specific community called hybrid cloud. It reduces the cost among the associations. It shares files, resources and infrastructure among organizations from a specific community.