Despite leaving years ago, Scale AI's 30-year-old cofounder has become the youngest self-made woman billionaire in the world by holding onto her stake in the company. Read the full story on Forbes: https://www.forbes.com/sites/kerryadolan/2025/04/17/this-ai-founder-lucy-guo-scale-ai-has-unseated-taylor-swift-as-the-worlds-youngest-self-made-woman-billionaire/ Subscribe to FORBES: https://www.youtube.com/user/Forbes?sub_confirmation=1 Fuel your success with Forbes. Gain unlimited access to