Arnaud Plas

In a Brooklyn building on Grand Street, a machine waits to mix a bottle of shampoo that does not exist yet. It will not exist until someone, somewhere, finishes an online quiz about their scalp, their water, their goals, and clicks buy. Only then does the formula get made. This is the whole bet of Prose, and Arnaud Plas has staked roughly a decade of his life on it being the right one.

Plas is French, a long-distance runner, and a recovering big-beauty executive. He spent years inside the CPG machine watching companies guess at people in groups - dry hair here, oily there, curly over there - and sell them the closest approximation off a shelf. He found the guessing maddening. The technology to do better existed. The will, inside a legacy giant, did not.

So in 2017 he left to build the will from scratch. Prose now sells more than 10 million bespoke products, has run over 6 million consultations, and - the part that makes other direct-to-consumer founders sit up - turned a profit in 2023. In a category littered with venture-funded brands that scaled into losses, Plas built one that pays for itself.

The trick was reversing the order of operations. Most beauty companies make a million units and then go hunting for buyers. Prose finds the buyer first, learns who they are, then makes the thing. It sounds obvious. Almost nobody does it, because the supply chain to support it has to be invented, not bought.

The career started at Henkel, the German consumer-goods company, where Plas worked across home care before drifting toward the parts of the business that touch the body - skincare, body care, hair. Somewhere in there, in 2010, he and his father launched an online shop selling construction hardware across Europe. It was not glamorous. It taught him how an e-commerce supply chain actually behaves when a customer hits the button.

Then came L'Oreal. He managed L'Oreal Paris skincare brands in France as a group manager, then crossed the Atlantic to become VP of Digital & E-commerce Strategy, charged with dragging L'Oreal USA's digital operation into the present. It was a serious job at a serious company. It was also, by his own telling, where the itch became unbearable.

The constraint was structural. A company that has spent a century perfecting mass production is not built to make one bottle at a time, no matter how badly a customer might want it. Plas concluded the only way to build a product for an individual was to build a new company around the individual - the consultation, the formulation, the supply chain, all of it - rather than retrofit an old one.

He pitched the idea to a L'Oreal colleague, Paul Michaux, over drinks. The plan: change the relationship between salon clients and the prestige brands that talked at them. Michaux signed on as head of product. Chemist Catherine Taurin, with 35-plus years of custom formulation behind her, became the R&D backbone. Nicolas Mussat, met through an early investor, came in as CTO. Prose launched in December 2017 with one stubborn goal: the best hair possible, made to order.