Maxime Berthelot is CEO and co-founder of Lucis, a Paris-based preventive healthcare startup backed by General Catalyst, Y Combinator, and Singular, on a mission to make disease prevention the default across Europe.

Maxime brings over 15 years of experience building and scaling consumer internet businesses, with deep roots in health, performance, and longevity; he trained at Le Wagon and built one of Europe's largest longevity media and community platforms, which seeded Lucis' early traction.

Maxime previously built and sold PixelMe, and founded multiple profitable D2C businesses in the health and supplement space, giving him rare commercial and operational depth in the wellness category.

At Lucis, Maxime leads a team of 20 across engineering, clinical, growth, and operations, supported by a medical board and a network of 10+ physicians providing clinical oversight across four European markets.

In under a year, Lucis reached 10,000 users, delivered over 1 million biomarker tests, and raised a total of $28M; 75% of six-month users improved three or more health markers without medication.