Stéphane Romanyszyn

Stéphane Romanyszyn is a Partner at 50 Partners based in Paris, Île-de-France, France, where he leads seed and Series A investments across the European technology sector. Before transitioning to venture capital, he held operational roles at high-growth startups, co-founded multiple SaaS and financial technology companies, and earned a degree in business administration from HEC Paris. He currently manages an active portfolio of more than 20 early-stage enterprises, with his broader investment ecosystem featuring notable regional technology companies such as Alan, Payfit, and Ledger. In March 2026, Romanyszyn directed a €12 million seed funding round for an emerging artificial intelligence cybersecurity startup, following a significant €150 million portfolio acquisition exit realized in 2023. His current investment strategy focuses on identifying strong founder-market fit and product-led growth within the artificial intelligence, deep technology, financial technology, and software sectors.