We Speak Entrepreneurs

Alexandr Wang Started Scale AI at 19 in a Y Combinator Dorm Season. Meta Paid $14.3 Billion to Bring Him In House

Published

3 days ago

November 12, 2026

Alexandr Wang, co-founder of Scale AI and chief AI officer at Meta. Photo by Meta Platforms, Inc., CC BY-SA 4.0, via Wikimedia Commons.

Some founders sell their company. Alexandr Wang’s company was valued at more than $29 billion in a deal widely understood to be about acquiring the founder himself. Nine years after starting Scale AI as a teenager, Wang walked into Meta as its first chief AI officer, running the largest social media company’s entire artificial intelligence operation at 28.

Wang grew up in Los Alamos, New Mexico, the son of two physicists at the national laboratory, and arrived at MIT on scholarship before leaving after a year. In the summer of 2016, at 19, he co-founded Scale AI with Lucy Guo through Y Combinator. The insight was unglamorous and decisive: AI models are only as good as the labeled data they learn from, and somebody had to industrialize the messy human work of producing it. Scale became that somebody, supplying data to OpenAI, Microsoft, Anthropic and the U.S. Department of Defense, and a 2021 financing round valued the company at roughly $7 billion, making Wang, at 24, one of the youngest self made billionaires in the world.

On June 12, 2025, Scale announced Meta’s investment of about $14.3 billion for a 49% non-voting stake, valuing the company at over $29 billion. As part of the deal, Wang stepped down as Scale’s chief executive, handing the role to Jason Droege, stayed on Scale’s board, and joined Meta to lead the new Meta Superintelligence Labs. Forbes had put his net worth at $3.6 billion that April.

The through line of Wang’s decade is a founder who picked the bottleneck nobody wanted. While the industry raced to build models, he built the picks and shovels the models could not work without, then sold a near half interest in that position at a $29 billion mark while keeping a seat on the board of the company he started at 19.

We Speak Entrepreneurs

Lucy Guo Left Scale AI in 2018 and Kept Her Shares. At 30 She Became the Youngest Self Made Woman Billionaire While Building Passes

Published

3 days ago

November 12, 2026

We Speak Media

Lucy Guo, co-founder of Scale AI and founder and CEO of Passes. Photo by KBDBK, CC0, via Wikimedia Commons.

The most valuable decision of Lucy Guo’s career was the one she made on her way out the door. When she left Scale AI in 2018, two years after co-founding it, she kept her stake. In April 2025 Forbes named her the youngest self made woman billionaire in the world, and she earned the title while running a completely different company.

Guo, a self taught coder who dropped out of Carnegie Mellon on a Thiel Fellowship, co-founded Scale AI in 2016 at 21 with Alexandr Wang, who was 19. She ran operations and product design before leaving in 2018, holding on to just under 5% of the company. As Scale’s value climbed, a 2025 tender offer at a $25 billion valuation, followed by Meta’s June 2025 investment at more than $29 billion, that stake carried her net worth to an estimated $1.25 billion at age 30, passing the mark Taylor Swift had set. Forbes counted her among just six self made women billionaires on the planet under 40.

Her working days, though, belong to her second company. Guo founded Passes in 2022, a Los Angeles based platform that lets creators sell subscriptions, chats and content directly to fans in a brand safe setting. Passes has raised about $50 million across three rounds from investors including Bond Capital and Menlo Ventures, at a reported $150 million valuation, and has signed names including gymnast Olivia Dunne and Shaquille O’Neal.

The pairing is the story business students will study. One founder, two companies: the first made her rich because she kept ownership even after she left the building, and the second is the one she is still in the building for, building the creator economy platform she wants to run for the long term.