Firm internationalisation has been a broadly examined subject, which has generated various established theories. Previous business activities are described as structured, incremental and predictable, which has enabled the development of frameworks that describe how the business internationalisation is conducted. Today’s technological advances, globalisation and changes in demographics are contemporary environmental forces of change, and the Swedish tech industry is growing in a steady phase. The tech start-ups internationalise rapidly and from an early age but in various ways, and therefore, reflecting diverse internationalisation theories to different extents. The wave of tech start-up is increasing and are seemingly operating in an unconventional manner and contradicts well-known theories, leaving scholars in the search for profound understanding about this phenomenon. Consequently, lack of previous research based on tech start-ups internationalisation processes has provided motivation for this study, with the intention to provide knowledge to companies and contribute with new theory angles to the existing literature.

The purpose with this study was to fill the research gap on tech start-up internationalisation by investigating and analyse how the Stockholm-based tech start-ups internationalise, what barriers and drivers they have encountered while pursuing the expansion as well as, how these have affected the internationalisation. The literature review emphasises on internationalisation theories as well as, barriers and drivers of the internationalisation process and is summarised with a conceptual framework. The study was conducted through a qualitative case study including four companies of, which all four had established international operations and therefore, generated insightful information about the subject. Moreover, interviews with founders and CEOs of the companies were conducted through semi-structured approach, which including questions related to their internationalisation process and the barriers and drivers. The empirical data was thereafter organised and paralleled with previous theories as well as, with the authors' considerations. Finally, the conclusion highlight answers to the research questions and provide theoretical and practical implications, as well as suggestions for further research.