In this paper is analyzing influence of competition on company work. It is taken an example of “Septyni užraktai ir ko“ company. The theory of competition and competition environment is included. Types of market structure, their influence on company work and on price variation of goods is measured as well. It has been done the researched on JSC „Septyni užraktai ir ko“ of competitive advantages. M.Porter model of five powers is taken as a ground. Efficiency of advertisement is researched and is given approaches how to reform it. It‘s given calculations on security service budget and possibilities of project implementations. In the context of security services market formation is delivered the solution how to gain essential advantage between competitors in the market.