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This thesis focuses on the internationalization process of SMEs, the strategies and methods they use. The major aim of this research was to gain a better understanding of the process by comparing and analyzing three main internationalization process theories: the Uppsala model, network theory and international entrepreneurship theory. An essential part of this study consisted of gathering empirical data from SMEs that has already been internationalized as well as from some of those who intend to internationalize in the near future. Our findings show the application and usefulness of the three theories to these SMEs, especially their heavy reliance on network relationships. The findings also indicate that firms use a combination of variables from all three theories and some aspects of the much criticized Uppsala model are still significant in describing the internationalization process behavior of SMEs.