Forbes Daily Briefing

Martin Varsavsky has trouble keeping track of all the ventures he’s started. There are more than a dozen of them, including a handful that became worth more than $1 billion. But Certuma, which launched quietly this winter, may be his biggest idea yet: He plans to build the first FDA-approved AI doctor.

“What’s happening now is everyone you know, and probably you yourself, are checking your medical problems with AI. But then what happens when you want action? The AI, after giving you a wonderful, accurate diagnosis of what’s wrong with you, says, ‘I am not a doctor,’” Varsavsky tells Forbes. He ticks off all the questions it might answer this way, from getting a prescription to scheduling imaging. “I want to fix the ‘I am not a doctor’ problem by building AI that is recognized by the FDA and recognized by the states.”

AI doctors could help solve an important problem, much like telemedicine did during the Covid-19 pandemic. There simply aren’t enough physicians to serve all the people who need them, especially in rural areas. The shortage is only getting worse. More than 100 million people in the United States face barriers to accessing primary care.Meanwhile, some 46% of counties don’t have a cardiologist; in rural counties, that number rises to 86%.

By Amy Feldman,

Senior Editor
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Last winter, Groq cofounder and CEO Jonathan Ross walked into a meeting with Nvidia CEO Jensen Huang with a pitch for the companies’ tech to work together. He now describes the synergy with a logistics analogy: stop building AI data centers as if every workload wants the same hardware. Training is bulk hauling; inference is last-mile delivery. GPUs can do both, but using the 18-wheeler even when you just need a van can be a lot slower. So: Nvidia’s general-purpose GPUs are the big trucks. Groq’s specialized chips—LPUs, or language processing units, designed to run models fast—are the smaller vans. “If you were building out a logistics network for the entire United States, and I told you your two options were all 18-wheelers or just delivery vans, which one would you pick?” Ross said. “The best answer is both.” 

Ross wasn’t just pitching a worldview. He wanted Nvidia’s permission to buy around 100,000 Blackwell chips, likely worth billions. Huang grilled him on the technical details, and then the meeting ended.

 When Huang called back three days later, Ross expected a discussion about his GPU purchase order. Instead, the Nvidia CEO cut to the chase. “We should probably move really fast,” Ross recalled him saying.
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The financial technology industry has become a world of haves and have-nots.

Take San Francisco payments company Stripe, which helps millions of merchants accept credit cards, process stablecoin transactions and manage billing tasks. In 2025, it brought in $6.9 billion of net revenue and $1.2 billion of earnings before factoring in interest, tax, depreciation and amortization expenses, according to a person familiar with its finances. Revenues were up more than 30% from 2024.

That’s world-class scale and growth, but its recent valuation of $159 billion, which has afforded each of the Collison brothers a $17.5 billion fortune, means its private backers think it’s worth nearly five times Adyen, a Dutch fintech and close competitor. Unlike Stripe, Adyen is publicly traded. It processed $1.6 trillion in payments last year compared with Stripe’s $1.9 trillion. Stripe loyalists will point out that it has more business lines than Adyen and is growing faster off of a larger base. But the chances that Stripe could maintain a $159 billion valuation if it went public today are slim. Public investors value e-commerce platform Shopify at $165 billion, and it grew nearly as fast as Stripe last year and had more than double the profits. A Stripe spokesperson declined to comment.
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After moving to a new city in North Carolina in 2024, Cookie (a pseudonym) felt the weight of a new city. Their husband was traveling a lot for work, and as a stay-at-home parent with a now 4-year-old daughter, the days were “very draining”. Since Cookie didn’t know anybody in their new town, they turned to Janitor AI, a social chatbot site known for its unbounded, often explicit, fantasy roleplay. It was a “nice release,” Cookie told Forbes.

Cookie grew up around fantasy and romance novels—their mother kept a collection—and Janitor AI became an easy way to escape the drudgery of the day-to-day. By the time their daughter is down for a nap or tucked in for the night, Cookie is creating "slow burn" romance characters with detailed and often explicit prompts. There’s Charlie, a nudist werewolf roommate; Marcus, a seven-foot ghoul with a taste for dive bars; Greenwood, Colorado, a fictional town where humans live alongside supernatural “demihumans.” Beneath Greenwood’s romance and monster lore is a civic rot: a glossy new church masking an organ-harvesting operation, with seedy bars serving as bait.

Cookie is one of Janitor AI’s 2.5 million daily, die-hard users. The platform claims more than 15 million total users and with 100 million monthly visitors, and it's the tenth most popular consumer AI app, according to Similarweb, a digital market intelligence company.

By Anna Tong,

Forbes Staff
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The WNBA tips off its 30th season on Friday, but across those three decades, it has never experienced anything like the Golden State Valkyries, on the court or off it. Last year, the Valkyries became the first expansion franchise in league history to reach the playoffs in its inaugural season and sold out all 22 of their home games to set a league record with average attendance of 18,064.

By the end of the regular season, Golden State had generated $78 million in revenue, not only breaking another WNBA record but also surpassing more than half of the clubsin a more mature men’s league, MLS. As the team enters its second season, the Valkyries have raised prices yet managed to expand their season-ticket base by 2,000 seats, to 12,000, proving that there is still room to run—and helping them race to the top of the WNBA’s most valuable teams, worth an estimated $780 million.

The Valkyries are not the only ones on a financial fast break, however. The 2025 WNBA season also saw the three next-best revenue totals in league history—the Indiana Fever’s $58 million, the New York Liberty’s $43 million and the Las Vegas Aces’ $34 million, according to Forbes estimates—and no team is now worth less than $250 million.

By Brett Knight,

Assistant Managing Editor
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