Lucis

Lucis is a Paris-based preventive health platform that analyses over 110 blood biomarkers (covering metabolic health, hormones, cardiovascular risk, inflammation, and nutrients) and feeds the results into an AI-powered health companion app to deliver personalised guidance on nutrition, supplementation, and lifestyle changes. Founded in 2025 by Maxime Berthelot and Baptiste Debever, the company raised a $20M Series A led by Singular, with participation from General Catalyst and Y Combinator.