We are a Cologne-based early-stage investor

With a mindset of a business angel and the firepower of a VC, we fill the gap between business angels and traditional venture capital firms

STS Ventures is a Cologne-based early-stage VC, founded by Stephan Schubert, that typically invests in the pre-seed and seed stages. Having founded and exited 4 own companies, including OnVista, Stephan is a serial entrepreneur in the German internet industry. Since the rise of the internet in Europe in the late 90s, he has been investing in numerous technology-driven startups and has built an outstanding track record. He is one of the most active, connected, and experienced business angels in Germany. If you are looking for a genuine entrepreneur who has overcome obstacles similar to those you may face in the future and if you could benefit from honest advice and timely feedback, we are the right partner for you.



We were founded by an angel and like the best angels, we aim to be a partner at eye level. Through our many years of experience as entrepreneurs, and our diverse network of decision-makers in various industries, top talents, and investors, we will help you build a company that lasts.

read more


Investments in startups




Team members



Meeting room of sts-ventures.


We back hidden champions that grow strong and steadily over time. We invest in numbers-driven founders who prioritize balance over burn by managing costs while pursuing growth. Learn more about how founders have expressed their confidence in us.

read more


Christian Gaiser Founder of kaufDA

Stephan is a very active and numbers-driven investor. His honest feedback helped us along our entire entrepreneurial journey.

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

Manuel Müller Founder of Emma - The Sleep Company

We could not have achieved this great success alone. We strongly recommend STS to every founder who wants to build a sustainable business!

Marco Vietor, Founder of Audibene

Marco Vietor Founder of Audibene

We really enjoyed working with STS. Stephan brought in many key ideas and concepts which we are grateful for!

Phonecall in the office of sts-ventures.


If you have an investment opportunity that you would like to discuss, please get in touch.

get in touch