We back hidden champions that grow strong and steadily over time. We invest in number-driven founders who prioritize balance over burn by managing costs while pursuing growth.

Stephan is a very active and numbers-driven investor. His honest feedback helped us along our entire entrepreneurial journey.
Christian Gaiser, Founder of kaufDA

Porträt von Manuel Mueller, CEO und Founder von Emma, The Sleep Company im Büro

We could not have achieved this great success alone. We strongly recommend STS to every founder who wants to build a sustainable business!
Manuel Müller, Founder of Emma - The Sleep Company

Marco Vietor, Founder of Audibene

We are grateful for Stephan's support over the years. He provided ideas to optimize marketing and sales and helped us conduct an efficient fundraising process.
Marco Vietor, Founder of Audibene