The goal of this bachelor project is to compare offers of a few e-Commerce (e-Shop) solutions which are realized as SaaS (Software-as-a-Service). After this comparison, I will try to chaose the most suitable e-Commerce projects for small and middle business units (SMUs). The project is divided into five sections. The first part starts with a definition and description of the problem. The following two sections include the theoretical aspects of SaaS and e-Commerce. There are defined the basic features and there is also written something about history and technology of these models. The next part deals with mentioned comparison of several e-Shop projects. There are defined the criterias for choosing of the individual providers and the metric...