Kostas Aretakis is a Product Manager at Sam Altman’s Tools for Humanity, helping build the World network and the Orb, a pioneering device designed to verify unique humanness in the age of AI. His work focuses on scaling a network that enables nearly 19 million people to prove they are real, unique humans, while bringing World ID and proof of human to everyday digital experiences and enterprises, from platforms like Zoom and Tinder to the broader internet. Beyond technology, Kostas is passionate about entrepreneurship, building communities, and turning ambitious ideas into impactful ventures. Recognized on the Forbes 30 Under 30 list, he has been actively involved in the Greek and international startup ecosystems, connecting people, ideas, and opportunities to help shape the future.