Information technology and its application are important for a modern organization or company and serve to simplify and improve business. For a company to perform its goals and tasks efficiently and quickly, it must know how to properly apply information technology. Nowadays, every organization applies IT processes in its business, and this thesis aims to show the importance of appropriate organizational structure, as well as the need to manage IT processes and the existence of competition for IT companies. The purpose of this paper is to analyze IT companies and the processes that take place in them. In order for a company to be successful, it must coordinate all components of the business, from the goals of the organization and organizational structure, all the way to managing IT processes. Every company needs to have a specific goal to steer the business in the right direction and achieve success in the market and among customers. The application of an appropriate organizational structure is extremely important for the company in order for the business to run efficiently and with the correct distribution of jobs and tasks. Since information technology is crucial for quality and successful business, it is important to properly manage IT processes in the organization and properly implement them in business. Given the growing development and popularity of the IT sector, both in the world and in Croatia, the representation of IT companies is increasing. Therefore, it is crucial that companies consistently improve their business in order to maintain their market position alongside competition and gain a competitive advantage. For this reason, companies are constantly innovating and investing in business improvement, as well as in the education and training of their employees.