A central element of this research by the Borderstep Institute is the systematic long-term measurement of the green start-up ecosystem in Germany. This year, the findings will be published as the "Green Startup Report 2025". The study marks a milestone: for the first time, a new, scientifically validated methodology is being used that enables a much more precise analysis of the dynamics of green start-ups. It is based on data on more than 12,000 young companies and over 50,000 commercial register entries on investments in start-ups. The Green Startup Report 2025 thus offers a previously unrivalled level of empirical depth and enables more well-founded statements to be made about the development of sustainable business models, their market opportunities and their actual contribution to climate protection. The analysis makes it clear that green start-ups are relevant players in the sustainable transformation. They develop market-based solutions for environmental and climate protection. Through their entrepreneurial activities, they make a measurable contribution to achieving national and European climate targets.