The business environment significantly affects the business of business entities, but also the behavior of the owner of the entity. The interaction between the business environment and the business entity, which will be analyzed throughout the thesis, also determines the success of the business entity in the market. In the introductory part of the paper, the notions of micro and macro environment, entrepreneurial ecosystem, as well as elements of the environment that can act as stimulating or limiting will be explained in more detail. However, the business model itself, ie the way in which the business entity creates and delivers a value proposition, must be in accordance with the business environment of the entity. Therefore, in this diploma work, the impact of the entrepreneurial ecosystem on the business model and business of the business entity from the environment will be analyzed, on a practical example. The competitive advantage of a business entity is reflected, among other things, in the design of the business model. In times of crisis, the business model is first analyzed and adapted to the new conditions in the environment. In the empirical part of the paper, the influence of two markets (Croatian and Belgian) on the design of business models and the business of two business entities will be analyzed. The analysis of the business ecosystem itself, as well as the comparative analysis of the two systems will serve as a basis for making a decision on the internationalization of the business of the selected business entity. In conclusion, observations from the theoretical and empirical part of the paper will be presented and it will be concluded how much influence the environment has on the business entity, how the entrepreneurial ecosystem affects entrepreneurial activity in individual countries, what is the adjustment of business model environment, and how much the micro and macro environment of these markets really influences the risky decision on the internationalization of business.