Lucy Guo becomes youngest self-made female billionaire at 30
Scale AI cofounder Lucy Guo just knocked Taylor Swift off the top spot as the youngest self-made woman billionaire. Her net worth hit $1.3 billion.
The milestone puts Guo in rare company but doesn’t mean she’s splurging. 
She told Fortune she still pins pennies despite the fortune.
"Even with a $1.3 billion net worth, the 30-year-old cofounder of Scale AI tells Fortune she still pinches the pennies."
Guo’s wealth comes from helping scale AI data annotation and infrastructure. The startup has been a major player in fueling AI training data.
At 30, Guo’s now the youngest in the self-made female billionaire club. The ranking comes as the world watches more tech founders hit massive valuations early.
No word yet if Guo will loosen the purse strings anytime soon. For now, she’s proof you can build big—and stay thrifty.
