Investment Stage

Focus Areas

About Investor

Stefan Haubner is a Founding Partner and General Partner at Apex Ventures based in Vienna, focusing on DeepTech and EnergyTech investments. He typically invests in Seed and Series A startups that are building highly technical and scalable solutions. His investment range is between $575K and $2.9M, with an average check size of around $1M. Stefan is particularly interested in science-driven innovation, industrial technologies, and energy transformation solutions. He works closely with founders to help bridge early technical development with commercial scaling. His profile reflects a strong focus on deep technical expertise and capital-efficient scaling.