Samuel Vionnet

CEO and Founder - Valuing Impact

Samuel Vionnet is the CEO and Founder of Valuing Impact, where he leads the development of advanced tools, methodologies, and scientific approaches for quantifying social and environmental value creation. Under his leadership, Valuing Impact has developed an AI-powered software platform, a fully global and open value-factors dataset, and a robust impact valuation method that enables organizations to measure and manage their impacts with unprecedented rigor. Samuel works at the forefront of the field with leading companies and investors—including Target, Natura, Nestlé, Summa Equity, Astanor, Wilstar, and others—to strengthen decision-making with evidence-based impact insights. With 20 years of experience in sustainability analytics and impact valuation, he is committed to advancing the science that helps organizations create real, measurable value for people and the planet.