Alexandr Wang

Y Combinator, Summer 2016

Scale began in 2016 with Lucy Guo, who had recruited Wang and was at first the chief executive. According to Fortune's account of the company's early years, the two first planned a concierge service for doctors. They changed course after joining Y Combinator's Summer 2016 batch and settled on labeling the data that machine learning models are trained on.

The partnership did not last. Fortune reports that the board sided with Wang, who took over as chief executive after the Series A. Guo left in 2018 after a falling out. She kept a stake of about 3 percent, according to Forbes, and Fortune later described her as the youngest self-made woman billionaire.

Contracts With the Pentagon

Wang built Scale into a supplier for the companies racing to train large models and for the U.S. military. TIME's 2023 list of the most influential people in AI named the U.S. Army, the U.S. Air Force, and the Pentagon's Chief Digital and Artificial Intelligence Office among Scale's clients, alongside Meta, Microsoft, and OpenAI. TIME also reported that a 2018 trip to China made Wang outspoken about AI and national security. He briefed lawmakers and appeared at hearings on Capitol Hill. Scale's own blog says it worked with the Defense Department on testing and red-teaming large language models, including at the White House-supported DEFCON 31 event.

Fortune described Wang as an "AI whisperer" in Washington and reported on a gathering he hosted with investor Nat Friedman at the Montage Deer Valley resort, attended by senior Pentagon officials.

The Series F at $13.8 Billion

On May 21, 2024, Scale announced a $1 billion financing at a $13.8 billion valuation, a mix of new and existing shares led by Accel. CNBC listed Nvidia, Cisco, Intel, ServiceNow, AMD, Amazon, and Meta among the backers and put Scale's total funding at $1.6 billion. TIME had valued the company at about $7 billion a year earlier. Fortune later reported a valuation of $14 billion with a tender offer at $25 billion pending, shortly before the deal with Meta.

240,000 Contract Workers

The labeling itself was done by a large outside workforce. TIME reported that more than 240,000 contract workers faced delayed, reduced, or canceled payments. Guo told TIME the issue had been a "clashing point" between the founders. Scale said late payments were exceedingly rare. Asked by TIME about his management style, Wang described "very high attention to detail, being very in-the-weeds, being quite focused, instilling a high level of urgency."

Meta's $14.3 Billion for 49 Percent

In June 2025, Meta agreed to pay $14.3 billion for 49 percent of Scale in non-voting shares, a deal that valued the company at about $29 billion. On June 12, Wang confirmed in a memo that he would leave as chief executive to join Meta, keeping a seat on Scale's board. Jason Droege, the chief strategy officer, became chief executive. Fortune reported that Guo received about $750 million from the transaction and that the terms included a provision tied to Wang himself: if he leaves Meta, the shares convert at a ratio of 1.5.

The deal cost Scale some of its largest customers. TIME reported that Google and OpenAI were cutting ties with Scale after Meta bought in.

Meta Superintelligence Labs

On June 30, 2025, Mark Zuckerberg told staff in a memo, published by CNBC, that he was creating Meta Superintelligence Labs. Wang became the company's first chief AI officer and co-led the new unit with Nat Friedman. A year later he was still in the role. Fortune reported on July 9, 2026, that the lab had released Muse Spark 1.1, an update to its AI model, after a rebuild of Meta's AI teams that some staff described as whiplash. Zuckerberg had also created a separate Applied AI unit in March 2026.

Three Estimates of One Fortune

Wang has never disclosed his ownership percentage in Scale, and no source opened for this article states it, so FamousBio does not compute a number from the company's valuation. Three dated third-party estimates exist, and they do not agree:

Fortune, in a June 13, 2025 article carried by Yahoo Finance, put his net worth at $3.6 billion after the Meta deal and called him the youngest self-made billionaire, a title he had first earned at 24. Fortune's longer account of the deal, published June 22, 2025, said his personal stake was reported at $5 billion at the $29 billion valuation. Forbes, whose profile was last updated on March 10, 2026, showed a real-time estimate of $3.2 billion on October 1, 2026. The sidebar uses the Forbes figure because it is the most recent. None of the three publishes its calculation, so the spread is the honest range: somewhere between .2 billion and billion, depending on the date and the method.

Sources

• Alexandr Wang
• The inside story of Scale AI cofounder Alexandr Wang's rise and the $14 billion Meta deal | Fortune
• Scale AI: Data-centric infrastructure to accelerate the development of AI | Y Combinator
• Lucy Guo
• A 30-year-old AI founder who followed the FIRE movement to build wealth is now the youngest self-made woman billionaire | Fortune
• Alexandr Wang: The 100 Most Influential People in AI 2023
• Scale's Series F: Expanding the Data Foundry for AI | Scale AI
• Amazon, Meta back Scale AI in $1 billion funding deal
• Alexandr Wang on AI's Potential and Its 'Deficiencies'
• Scale AI founder Wang announces exit for Meta part of $14 billion deal
• Mark Zuckerberg creating Meta Superintelligence Labs. Read the memo
• Meta releases latest update of AI model Muse Spark | Fortune
• Self-made billionaire college dropout Alexandr Wang signs $14.3 billion deal to bolster Meta's AI efforts: 'There's a huge premium to naivete'