A new generation of tech entrepreneurs, reminiscent of the 'PayPal Mafia,' is making waves in the AI industry with billion-dollar valuations. This group, which includes notable figures like Alexandr Wang, Scott Wu, Johnny Ho, Jesse Zhang, and Demi Guo, shares a common history of excelling in competitive programming and mathematics during their formative years. Alexandr Wang, a former MIT dropout, founded Scale AI, which reached a $7.3 billion valuation by 2021. Meta acquired a 49% stake in Scale AI for $14.3 billion in 2025, integrating Wang into its AI development team. Scott Wu co-founded Cognition, an AI startup valued at $10.2 billion, while Johnny Ho's Perplexity, an AI search engine, achieved a $20 billion valuation. Jesse Zhang's Decagon, focused on AI-driven customer service, reached a $4.5 billion valuation, and Demi Guo's Pika, specializing in AI video generation, secured significant funding. These entrepreneurs, who began their journeys through internships and competitions, are now leading the charge in AI innovation, drawing comparisons to the influential network of the original 'PayPal Mafia.'