This master thesis presents an introduction to startup entrepreneurship focused on the startup entrepreneur himself, that is, his entrepreneurial competencies that form the basis of success and the foundation of entrepreneurial initiative. Entrepreneurial competencies are determined by implementing the EntreComp model established by the European Commission as a European framework for entrepreneurial competencies. Studying previous research, the model proved to be a good tool for self-assessment of entrepreneurial competencies. Data collection was based on a structured questionnaire. The questionnaire administered to the finalists of the Startup Inkubator Rijeka provides insight into the socio-demographic characteristics of startup entrepreneurs as well as the establishment of the relationship between entrepreneurial competences and entrepreneurial intention. The questionnaire was based on the internal structure of competences divided into four areas: ideas and possibilities, personal resources, specific knowledge and into action. The presented detailed analysis of the achieved results gives an insight into the current activity of the startup companies of individual finalists of the last five generations of the Inkubator in the period from the 8th to the 12th generation of the operation of the Startup Inkubator Rijeka, as the leading business incubator in the Primorje- Gorski Kotar County. Examining the individual answers to the questionnaire, it is evident that respondents with generally higher levels and better ratings of entrepreneurial competencies achieved more and better results in the development of startups, and their startups are currently still active.