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The world's youngest billionaire! Who is Lucy Guo, founder of ScaleAI?

The world's youngest billionaire! Who is Lucy Guo, founder of ScaleAI?

Lucy Guo, the founder of Passe, has surpassed Taylor Swift as the youngest female billionaire. Guo, 30, is included in Forbes' list of self-made female billionaires.

According to Forbes, she is also one of the world's six self-made billionaires under the age of 40. Notably, Guo is the only one on that list who built most of her fortune from a company she no longer works for. Her former startup Scale AI is up for a $25 billion tender offer.

Lucy Guo was born on October 14, 1994. She was raised in Fremont, California by Chinese immigrant parents, who were both electrical engineers. Despite their technical backgrounds, her parents were hesitant to let her pursue a career in technology, believing it would be challenging for a woman to succeed in the field.

Guo's interest in technology began early; she began coding in second grade and, as a teenager, developed robots for online games like Neopets, selling in-game assets for profit. She enrolled at Carnegie Mellon University to study computer science, but later dropped out in 2014 after receiving the Thiel Fellowship, a $100,000 grant that encourages young entrepreneurs to pursue their own ventures.

After Carnegie Mellon, Guo interned at Facebook and later joined Snapchat as the company's first female designer, contributing to the development of Snap Maps. She then worked at Quora, where she met Alexandr Wang with whom she went on to co-found Scale AI in 2016.

Guo left ScaleAI just two years after starting it. Based in San Francisco, Scale AI is now valued at $14 billion, and a new tender offer could take it to $25 billion. Guo still holds about 5% of the company, giving her a stake worth about $1.2 billion.

After her exit from ScaleAI, Guo launched Backend Capital, a venture capital firm that backs talented engineers. But she didn't stay away from construction for long.

In 2022, she founded Passes, a platform designed to empower content creators by giving them tools to monetize their work. The platform quickly gained traction, raising $40 million in a Series A funding round by 2024.

As of April 2025, Guo's estimated net worth is $1.25 billion, making her the world's youngest female billionaire at the age of 30.

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