Bobby Murphy — Snapchat's Silent Billionaire at 25

While Spiegel became the public face of Snapchat, his Stanford roommate Bobby Murphy quietly became a billionaire at the same age as CTO. Murphy built the core architecture that makes Snapchat's filters and Lens Studio work — the augmented reality technology that 250 million people use daily. His net worth sits at $4 billion. He gives almost no interviews, has minimal social media presence, and is one of the least-known tech billionaires on Earth. Murphy proves that in Silicon Valley, the richest person in the room is often the one nobody's heard of.