Arthur Querou

A $50 daily budget, a car wash, and the most premium screen in the house

How a French engineer turned the living-room TV into a self-serve ad channel for the long tail.

Picture the kind of business that has never once appeared in a television commercial. A neighborhood plumber. A car wash off the highway. A two-person e-commerce brand selling phone cases. For seventy years, those businesses were locked out of the most valuable screen in the home, because buying TV meant agencies, insertion orders, six-figure minimums, and a media buyer who spoke a language nobody else understood.

Arthur Querou built a company on the idea that this was absurd. Vibe.co, which he co-founded in 2021 and runs as CEO, lets any business set up a connected TV campaign in minutes, starting at fifty dollars a day, with no contracts and no media expertise required. You register, the platform suggests a strategy, you pick or generate a creative, and your ad runs across hundreds of streaming apps before the coffee gets cold.

It worked faster than almost anyone expected. By the company's own account, Vibe crossed a $100 million revenue run rate in under two years, signed up more than 5,000 brands and 10,000 performance marketers, and grew its customer base 2.5x year over year. In September 2025, investors led by Hedosophia put in a $50 million Series B at a reported $410 million valuation.

That sentence is the entire diagnosis. Audiences moved to streaming years ago. The plumbing that sells ads against them did not. Inventory is fragmented across hundreds of apps, measurement is broken, and the barriers to entry were built for a different decade. Querou's answer was to rebuild the stack rather than bolt streaming onto the old one.

Why he is chasing the small accounts everyone else ignores

The contrarian streak shows in who Vibe sells to. The connected TV market is roughly a $72 billion business, growing close to three times faster than total media. Small and medium businesses make up about two-thirds of the US economy. They account for around five percent of TV ad spend. Querou looks at that gap and sees the company.

"We want TV advertising to be so simple that anyone, even those with no media expertise, can set up a campaign," he has said. It is a deceptively soft sentence hiding a hard engineering problem: making something that was deliberately complex feel effortless, and making it pay off in measurable conversions rather than vague brand lift.

The product reflects that obsession with removing friction. A creative generator turns a few business details into a finished voiceover-and-video ad in seconds, so a small brand without a production budget can still look like one. The machine-learning bidding engine, IQ2, predicts which impressions will convert and buys accordingly - credited internally with pulling cost per conversion down from roughly $80 to the $15-$20 range. An AI assistant nudges strategy, and Vibe Connect opens up access to 500-plus streaming apps and channels.

There is a tidy logic to the whole stack. Three problems have always kept the long tail off television: inventory is fragmented across hundreds of streaming apps, measurement is broken once the ad leaves the screen, and the barriers to entry were built to keep small spenders out. Vibe answers each one directly. Certified Supply means direct deals with publishers rather than murky resale. The bidding engine handles the fragmentation. The measurement layer is where Querou plants his flag. Take away any one of those pieces and the fifty-dollar campaign stops making sense - which is why he insists on owning the full stack rather than renting parts of it.

The customer list that follows is deliberately unglamorous. Querou likes to describe the range as everything from e-commerce companies to local service businesses - the plumber, the car wash, the regional brand that would never have rung an agency's phone. The point is not that television suddenly got cheap. It is that the work of buying it got cheap, and the difference between a campaign that runs in minutes and one that takes a quarter to negotiate is the difference between a market of a few thousand advertisers and a market of millions.

From a meme-reader app to Sam Altman's office hours

Querou is French, and he came up through code before he came up through advertising. He studied computer science at EPITA, one of France's well-known engineering schools, finishing a Master of Engineering in 2015, and spent time at UC Berkeley along the way in 2012. The detail that tends to stop people is his accelerator class: he went through Y Combinator in batch W14, and his mentor there was Sam Altman, now the CEO of OpenAI.

What he took from YC was less a network than a temperament - ambitious ideas, fast execution, and a habit of surrounding himself with people obsessed with real problems. He put it to use immediately. Before Vibe, Querou racked up four exits across a run of mobile and adtech startups, with names like Appinest, Motionlead, Adikteev and Keymantics on the resume. One of the earliest, Appinest, was a meme-reader app he built and sold. Each one, by his telling, was a lesson in product, markets, and timing.

That pattern - build, learn, sell, repeat - is why people describe him as restless. He has been named to a Top 100 French Entrepreneurs Under 30 list, and he is comfortable starting from zero in a market he does not yet know. The throughline across all of it is a single, slightly impatient question he keeps coming back to: what's next?

The earlier ventures matter because they explain the confidence behind Vibe. Adtech and mobile marketing taught Querou how ads actually get bought and sold - the auctions, the attribution fights, the gap between what a dashboard claims and what a business banks. By the time streaming audiences outgrew the old buying tools, he had already spent a decade in the machinery underneath digital advertising. Vibe is less a pivot than a culmination: the same plumbing problems he had been wrestling with, pointed at the one screen that had stayed stubbornly analog in how it was sold.

Make incrementality the default, not last-click

Ask Querou where the industry has to go and the answer is unglamorous and specific: measurement. He argues that TV advertising should be judged on incrementality - whether the ad actually caused a sale - rather than the last-click attribution models the digital ad world has leaned on for years. It is a quietly radical position, because last-click is comfortable, familiar, and usually flattering. Incrementality is harder, and it is also the only honest way to tell a small business whether their fifty dollars worked.

His near-term priorities, by his own account, are scaling distribution and pushing that measurement standard across the category. The bigger ambition is the one he stated at the start: rebuild TV advertising from the ground up for the streaming era - simple, self-serve, intelligent, and accessible to every brand. Whether the rest of the industry follows is the open question. Querou is betting the long tail forces their hand.

He has assembled the kind of bench that suggests others take the bet seriously. The Series B brought in strategic backers including Carolyn Everson, a board member at Disney and Coca-Cola who spent years at the top of Meta's ad business, and Nirav Tolia, the CEO of Nextdoor, who joined Vibe's board. That is a lot of advertising firepower to point at the smallest accounts in the market.