This research study concerns entrepreneurial startups that converted into internationalization by implementing an export business strategy. MASApparel and Dilma Tea companies in Sri Lanka, two leading companies, were selected to illustrate the export strategy for business expansion in foreign markets. The research focuses on how both companies achieved their foreign markets and their continuous successful presence in the industry even now by doing. The study begins with a comprehensive discussion of the theory of competitive advantage, business strategy, and entrepreneurial internationalization. The terms examine both conventional and contemporary views of business strategies implemented to gain a competitive advantage to expand in the international market. A review of the basic concepts of entrepreneurship and internationalization proceeds with a detailed review of the literature on the competitive advantage of the business strategy. Various local and global influences are identified in the export strategy for the internationalization process. The selected two case's findings are presented, and the evidence is based on considering implementing an export business strategy for business internationalization.