The Idea

By 2022, Arthur Querou and Franck Tetzlaff had already done the hard thing once. The two French computer scientists had spent five years building KMTX, an ad-tech platform in France, before selling it to Seedtag. Querou was a YC alum with two ad-tech exits behind him. He could have rested.

Instead he kept circling one stubborn gap. You could launch a Facebook campaign from your sofa in five minutes. You could buy Google search at midnight with a credit card. But the biggest, most-watched advertising channel on earth, television, was still locked behind agencies, media buyers and five-figure minimums. Streaming had quietly swallowed the living room, yet buying an ad on it felt like 1985: phone calls, insertion orders, gatekeepers.

The insight was simple and slightly insulting to the incumbents. Millions of small businesses were spending on Meta and Google because nobody had built them a self-serve door into TV. So Querou and Tetzlaff decided to build the door. Pick your app, pick your audience, upload your creative, go live on streaming TV. The Google Ads of streaming. This was the beginning of Vibe.co.

The Execution

• 2017: Querou and Tetzlaff founded KMTX, an ad-tech platform in France, and spent five years turning it into a real business before looking for an exit.
• July 2022: They sold KMTX to Seedtag, the contextual advertising firm, freeing the founders to spin out a new idea aimed squarely at SMBs.
• September 2022: Vibe.co launched its self-serve platform on the back of a roughly $7M seed round led by existing backer Elaia Partners.
• 2023: With barely any sales team, Vibe hit revenue in the “tens of millions” and was delivering over 2X ROAS for clients ranging from local brands to Hyundai and John Deere.
• February 2024: In the middle of a brutal ad-tech funding winter, Vibe raised a $22.5M Series A led by Singular, with Sequoia’s Scout Fund and Motier, taking total raised to roughly $30M. Ad-tech veteran Ari Paparo joined the board.
• December 2024: Context that mattered: Walmart bought smart-TV maker Vizio for ~$2.3B, giving it the screens but not the software to fill them with SMB ad demand.
• 2026: Vibe scaled to more than 10,000 advertisers across 500+ streaming channels, with total funding around $50M, positioning itself as the SMB on-ramp Walmart’s Vizio inventory was missing.
• 23 June 2026: Walmart agreed to acquire Vibe.co, folding it into Walmart Connect. Terms were undisclosed, but the WSJ reported a $1.4B deal: around $1.2B cash plus roughly $180M to Vibe’s top executives. It is expected to close by the end of Walmart’s fiscal 2027.

The lesson?

Querou didn’t find a new problem. He found the same problem a third time and finally built the obvious thing nobody else would: a self-serve buying button for the one channel still run by gatekeepers. The wedge wasn’t fancy AI or exclusive supply, it was access. Make a $70B market feel like running a Facebook ad, and the customers locked out for decades come pouring in. Walmart didn’t pay a reported $1.4B for the technology. It paid for the 10,000 small advertisers who could never get on TV until Vibe handed them the remote.