How MIT dropout turned billionaire Alexandr Wang turned Meta’s Muse into an App Store hit

Muse, Meta's personal AI agent, rose to the top of Apple's U.S. App Store after its Sept. 8 launch, overtaking ChatGPT. Market intelligence firm Apptopia estimated that of Muse's 2.8 million mobile installs during its first 12 days, 1.8 million were on iOS in the U.S. and Canada, according to TechCrunch. ChatGPT recorded 1.3 million iOS downloads in the same two markets during the equivalent period after its mobile debut.

Meta's stock has risen nearly 20% since Muse's early-September debut, according to The Wall Street Journal.

Unlike conventional AI chatbots, Muse is designed to act on a user's behalf. It can send emails, book travel, shop online and perform other tasks through its own virtual computer, with users deciding which services it can access.

Behind the app is Wang, a 29-year-old MIT dropout whom Meta CEO Mark Zuckerberg recruited last year to help overhaul the company's AI operations. Wang is Meta's first senior executive from Generation Z, bringing an internet-native communication style unusual among executives at one of the world's largest technology companies.

At Meta's annual developer conference in September, he appeared onstage sporting a mullet, a 1990s-style camouflage T-shirt emblazoned with deer, black pants and camouflage Crocs. Wang later said the shirt cost $30 at a thrift store in Santa Cruz after social media users speculated that his outfit was worth thousands of dollars.

His online presence is similarly informal. Wang frequently posts memes, jokes and jabs at competitors on X, where he has become one of Muse's most visible promoters.

Alexandr Wan, Meta's Chief AI Officer. Photo courtesy of Meta

Wang's path to the top of Meta's AI operation began in Los Alamos, New Mexico, where he was raised by physicist parents who worked at Los Alamos National Laboratory.

Wang began programming as a teenager and enrolled at the Massachusetts Institute of Technology in 2015. He dropped out after his freshman year at 19 and co-founded data-labling startup Scale AI with Lucy Guo in 2016.

Scale built its business around preparing and evaluating the vast amounts of data used to train AI systems. As the AI boom accelerated, the startup became a major supplier to leading technology companies and made Wang one of the world's youngest self-made billionaires. Forbes estimated his net worth at $3.2 billion as of Oct. 5.

His rise eventually caught Zuckerberg's attention. In June 2025, Meta invested $14.3 billion for a 49% stake in Scale, valuing the startup at more than $29 billion. Wang stepped down as Scale's CEO and joined Meta at 28 to help overhaul its AI operations.

He was put in charge of Meta's new superintelligence operation, where he helped recruit top researchers and oversaw the development of a new generation of AI models. Meta released Muse Spark, the first model developed under the new operation, in April. Wang acknowledged at the time that it was not yet among the industry's leading frontier models.

Months later came Muse. The app was the culmination of more than a year of work led by Wang and Nat Friedman, head of Meta's AI products division, according to The Wall Street Journal. As Muse launched, he became one of its most aggressive promoters, flooding social media with memes, customer testimonials and jabs at competitors.

He posted more than 300 times on X following the app's launch, including more than 100 posts during one five-day stretch. Many featured Jolly, Muse's fuzzy mascot, while others amplified users describing how the agent had saved them money or handled everyday chores.

"Wang is attempting to insert Muse into meme culture by getting as far away from corporate jargon as possible," Nick Braund, founder of communications agency Words+Pixels, told Business Insider. "It feels like his PR strategy is being anti-PR."

Wang made clear that the campaign was largely his own rather than the work of a conventional corporate social media team. "Someone today said I had the best social team for the muse launch," he wrote on X. "Bruh this is all me out here rawdogging these tweets. I don't let the corposlops near my tweet cannon."

His campaign also spilled into a public rivalry with Instinct, another personal AI agent founded by college dropout turned tech entrepreneur Noah Shinn.

"Muse absolutely crushes Insect," Wang wrote in one jab, deliberately misspelling the rival's name. He also posted that Muse would beat Instinct in an MMA fight and declared it "way hotter than the other personal agents." Shinn responded to one of Wang's posts with a smiley face, Fortune reported.

The rivalry comes as competition intensifies in the personal AI agent market, with tech companies and startups racing to develop tools capable of completing everyday tasks rather than simply answering questions.

Last week while Zuckerberg attended a White House summit of AI leaders, Wang turned his attention to OpenAI's new rival agent, Dot. During a CNBC appearance promoting Dot, OpenAI finance chief Sarah Friar mistakenly referred to her company's product as Muse.

Wang quickly reposted the clip on X. "It's ok sarah muse is thinking about you too," he wrote.