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Cloud computing provides an infrastructure to process all types of data resources and also used for computing the data resources. It provides a good environment to work with data of large amounts. Despite all the technologies it has become the most important technology of the 21st century. In IT departments it focuses on strategic projects rather than to keep the data in running form. By understanding the solitary attributes and deliberation linked to each model. Any business or company can use it to take selective decision when they will worry about to select most profitable cloud computing for the maximum and specified requirement and ambition or intention. In this research paper we will present a comprehensive review on the different types of cloud computing services model. These models are used to provide intuition for consortium and to make decision- creator to purchase cloud technology. We are also discussing about the benefits, characteristics and comparison among IaaS, PaaS and SaaS.