The Lean Startup approach and its related Minimum Viable Product thinking is one of the key trends not only in entrepreneurship, but also in more and more established companies. Before this background, this paper experimentally investigates whether and how the Lean Startup approach improves innovation processes in established companies. For this, the overall experiment had 23 participants, the outcome was then matched against a control group and evaluated through a survey with 146 representatives of the target group of the product. The results show that the Lean Startup approach outperforms the traditional approach and that this method improves the success rate of innovation ideas and thus supports the learning philosophy within established companies. Moreover, the experiment revealed a superior performance, especially relating to financial output. Based on these results, implications for research and companies are discussed, as well as limitations and further research suggestions.