This paper reviews the new phenomenon ‘unicorns’. Little scientific research has been conducted on these big global startups since their existence, but this research should start the interest of academics and scholars to study the unicorns as a scientific field. With the focus on internationalization, this study consists of 15 case studies of the market entry methods of unicorns from three regions. The data was tested with scientific internationalization models as the Uppsala model and Born Global approach. The study found evidence that the Uppsala model is still applicable to some disruptive unicorns and furthermore, the study proves that not all unicorns are Born Globals. The study further found that a variation of market entry methods was chosen by the unicorns, with a strong focus on localization. The authors conclude that the unicorns and their success are a highly interesting topic to study and future research of this phenomenon should be an added value for the current business-related literature.