Bobby Murphy — Snapchat's Silent Billionaire at 25

Bobby Murphy became a billionaire at 25 as Snapchat's CTO, quietly amassing a net worth of $4 billion while building the core architecture behind the app's filters and Lens Studio — augmented reality technology used daily by 250 million people. In a league of his own, Murphy outperforms #5 Sam Bankman-Fried in longevity, having maintained his wealth for over a decade without scandal. He gives almost no interviews and maintains a minimal social media footprint, making him 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 has heard of.