Claire Tange

Co-founder & CFO

Claire brings a rare combination of engineering rigour and hands-on finance leadership to rex.ai. As CFO at Fastned she helped raise over €35 million and took the company through two public listings, and at Dott she built the finance function from scratch across 6 countries in 15 months. Alongside rex.ai, Claire is a Partner at Borski Fund and founder of Joanna Invests, backing female-led startups — giving her a sharp eye for what makes a company fundable and built to scale. Based in Amsterdam.