Here one of the additional article on peak of SaaS software, Business Applications, SaaS and SMB Market, we projected that SaaS spirit be a gathering enabler use for SMB (small and medium business) marketplace. In organize to give efficient SaaS solutions for enabling multi-tenant systems; it is vital that the key issues of data security and privacy are addressed. It is significant to identify and see that the necessities, compassion to data security and privacy; and pricing levels demand dissimilar levels of SaaS enabling. Here might be an application that can share the similar database with different clients as the application itself is not core toward the company and data do not demand the maximum stage of data security. On the additional hand, there might be an application that requires data encryption along with separate and dedicated database since the application data demands uppermost stage of data security. Let seem at different levels of SaaS ennoblement for business applications. The SaaS solution enables a multi-tenant system that can be use with several clients. The solution enables a safe and trusted environment where clients can perform business processes by absolute assurance. The decisive feature of multi-tenancy solution is data safety & privacy and application safety. In easy conditions, it is regarding data separation and application separation. In this critique, we shall focus on data security and privacy. There are several mechanism, which can be use to guarantee data separation so that a client do not obtain access to another client's data on the similar SaaS solution.