Lucis

Lucis is a preventive healthcare service that translates regular blood testing into actionable, personalized insights to help individuals extend their healthspan. Founded in 2024 in Paris by Maxime Berthelot (CEO), Baptiste Debever, and Max Guerois, the company aims to shift the healthcare paradigm from reactive treatment to proactive, data-driven prevention. The founding team's motivation stemmed from personal experiences, including a relative's death from a condition that could have been detected earlier.

The company operates on a subscription-based, business-to-consumer (B2C) model. Members undergo regular blood draws at one of Lucis's over 400 partner laboratories across Europe, including in France, the UK, Ireland, and Portugal. The service analyzes more than 180 biomarkers related to cardiometabolic health, hormones, inflammation, liver and kidney function, and micronutrients. This comprehensive panel provides a structured view of a person's health, aiming to identify imbalances and early signals associated with chronic diseases. The company explicitly positions itself as a preventive and educational tool, not a replacement for medical consultation or diagnosis.

Lucis combines artificial intelligence with review by a multidisciplinary medical team to interpret the test results. Instead of a static report, users receive access to a dynamic dashboard that tracks their data over time and a prioritized action plan. This plan is built around five pillars: nutrition, supplements, physical activity, sleep/recovery, and mental health. The platform is designed to empower individuals to take ownership of their health by providing clear guidance before symptoms appear.

In late 2025, Lucis secured an $8.5 million seed funding round led by General Catalyst, with participation from Y Combinator, Kima Ventures, and others. This capital is intended to accelerate the company's expansion in its existing markets and into new ones, grow its network of partner labs and physicians, and further develop its AI-powered platform. Since its launch, Lucis has served over 3,000 customers and conducted more than 500,000 clinical tests.

Keywords: preventive healthcare, blood testing analysis, healthspan extension, AI health platform, personalized health insights, biomarker tracking, proactive health, chronic disease prevention, longevity, nutrition guidance, Maxime Berthelot, Baptiste Debever, General Catalyst, Y Combinator, European healthtech, subscription health, B2C health, wellness monitoring, data-driven health, preventative medicine