A growing flood of advertising and information as well a limited capacity to collect information present a challenge to marketing today. Marketing in general is very important for the success of a company. But the classic marketing theory which ignores the special characteristics of young companies dominates. A new company with a new idea and a new product meets an existing market with customers and established competitors. For an innovation-related founding context this is a special challenge. In this bachelor thesis the subjects, entrepreneurship and marketing will be discussed first. In addition the special characteristics of young companies, the so-called liabilities will be explained. The meaning of the term entrepreneurial marketing is explained by detailed consideration of the close and wide conceptual understanding. Afterwards the comparison clarifies the difference to the classic marketing. As part of the literature review, the current state of research will be presented and the practical use will be examined in more detail based on the central approaches. The approaches are the guerrilla marketing, ambient marketing, sensation marketing, viral marketing and ambush marketing. How entrepreneurial marketing with the central approaches is used in a start-up company is analyzed by a qualitative investigation in the form of a case study. The case study shows that unconventional marketing measures and low use of medium can have a large effect. The entrepreneurial marketing therefore offers an alternative to classic marketing because it pays attention to the special characteristics of a young start-up company. This bachelor thesis shows that the entrepreneurial marketing can convert the weaknesses of young founding companies into strengths and lead to superiority over the competition.