Leo Grzhonko, Angel Investor

Leo Grzhonko is Chairman of the Board at OysterLabs, Inc., a role he has held since 2014. He is also a Partner at Chartwell Capital and previously served as CEO of Mondevices Inc., leading the company for a decade. Earlier in his career, Leo was President of AdoTube, a division of Exponential, where he oversaw growth in digital advertising solutions. His career reflects a consistent focus on technology, media, and venture leadership. Leo has combined executive management with board governance, guiding companies through innovation in advertising, consumer technology, and digital platforms. As an angel investor, Leo has backed ventures in AI and enterprise solutions. His investment in RELAYTO, an AI‑powered regulated content platform, reflects his interest in technologies that enhance communication, compliance, and scalability for modern organizations.