The paper presents the importance of encouraging and developing startups for entrepreneurship, as it largely influences the growth and development of the economy. The launch of a new entrepreneurial venture ensures greater employment, a positive entrepreneurial environment and creating new value as one of the basic goals of every entrepreneur. The aim of the paper is to demonstrate the role of small and medium-sized enterprises for the Croatian economy and the possibilities for their success. The basic characteristic of start-ups is fast growth, which is a key factor in successful business operations. Individuals usually enter a business venture because they believe they are "born for entrepreneurship" and say for themselves that they have a "passion for creation" or for some other reasons, such as dissatisfaction with current employment. The success of start-ups depends to a large extent on the level of institutional support and access to grants. Various types of support institutions have been set up with the aim of faster and easier development of entrepreneurship. It is about institutions founded by states and individuals or groups of people, but it is important to emphasize that both types of institutions have the same goal, which is to encourage entrepreneurship start-ups. In order to greatly facilitate entry into a new entrepreneurial venture, it is essential to have a certain amount of financial resources. In most cases, entrepreneurs do not have enough of their own financial resources and are taken by banks or other financial intermediaries. Nowadays, when there is an expansion of different types of financing, banks are still the most common form of assistance to start up financing in the Republic of Croatia. In accordance with the whole topic, the paper presents an example of a successful start up of a company created on the territory of the Republic of Croatia, and its innovative products have changed considerably the future.