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Lucis

Function Health for Europe

Think Function Health for Europe. We combine medical expertise and AI to transform regular blood testing into actionable insights to help people live healthier, longer. In four months in Paris, we've achieved $400K ARR, secured partnerships with France's leading lab networks, and partnered with key health influencers, proving our playbook works and scales rapidly. We are currently opening 4 new countries across Europe.
Active Founders
Max Berthelot
Max Berthelot
Founder
Founder & CEO of Lucis - Function Health for Europe.
Baptiste Debever
Baptiste Debever
Co-founder / CTO
Building the AI health navigator that extends your healthspan. 🇫🇷 engineer, repeat founder. Prev engineer at Gorgias.
Max Guerois
Max Guerois
Founder
Cofounder of Lucis - Function Health for Europe
Company Launches
Lucis - Live 100 healthy years from a simple blood test
See original launch post

Hey YC 👋

We’re Max B, Baptiste, and Max G - co-founders of Lucis.

TL;DR

Lucis turns regular blood tests into actionable health insights - so people can act before it’s too late. In 4 months, we’ve helped 500 people in Paris get ahead of chronic diseases. Today, we’re expanding across Europe.

https://youtu.be/a5fX1K5hnvU

The Problem In Europe

85% of deaths are caused by preventable chronic diseases. That’s more than 4 million lives lost every year just in Europe. Yet, the healthcare system remains reactive, and people receive care only after something goes wrong.

Those seeking comprehensive preventive care, including blood testing, analysis, and expert guidance, typically resort to private longevity clinics that charge over €50K per year. Such premium healthcare remains inaccessible to the vast majority of people.

Lucis: Health Insights in Your Pocket

“If you're tired of being in the dark about your health, not knowing where you stand or what to do next, Lucis is built for you.”

Lucis goes beyond vague checkups and unreadable lab reports. It provides a clear health baseline, tracks progress over time, and translates complex biomarker data into personalized guidance people can actually implement in their daily lives. All at a fraction of the cost of a private clinic.

You’ll get answers to questions like:

"Am I aging faster than I should?"

"Is my testosterone at a healthy level for my age?"

"How can I improve my next marathon performance?"

Here’s how it works:

  • 2 full health check-ups per year
  • See how your body’s doing with 15 health scores and your biological age - and track your progress over time.
  • Personalized action plan across nutrition, sleep, and movement
  • Access to longevity add-on tests, like microbiome, continuous glucose monitoring, and food sensitivity tests.

The Team

We started Lucis because we’ve lived the problem ourselves.

Baptiste lost a close relative to a condition that could’ve been caught earlier. Max B has spent the last decade deep in biohacking, testing everything from supplements to wearables. At 27, Max G turned his health into an experiment - tracking sleep, diet, and training - and improved nearly all of his biomarkers in the process. We know what it’s like to search for clarity and get none.

Lucis is what we wish we had - and now, we’re building it for everyone else.

Since launching our beta just 4 months ago:

  • 30,000+ people have joined our European longevity community.
  • 30+ lab locations opened across France
  • 2 new European cities - now live in Lisbon 🇵🇹 and London 🇬🇧
  • 500+ people in Paris used Lucis to get ahead of chronic illness
  • 10 AI Startups have gifted Lucis as a health benefit for their employees

Our Vision

Lucis isn’t just a product - we’re building a completely new healthcare system in Europe. One that lives with you. And works for you quietly, every day.

We started with blood, but our ambition goes far beyond a single input. We are building Lucis, the intelligence layer for your health. Right in your pocket.

Ask

If this resonates with you

Jobs at Lucis
Paris, IDF, FR / Paris, Île-de-France, FR / Remote (FR)
€70K - €120K EUR
6+ years
Paris, IDF, FR / Paris, Île-de-France, FR
€65K - €100K EUR
6+ years
Paris, IDF, FR / Paris, Île-de-France, FR / Remote (FR)
$1.1K - $2K
Any
Paris, IDF, FR / Paris, Île-de-France, FR / Remote (FR)
€60K - €120K EUR
6+ years
Paris, IDF, FR / Paris, Île-de-France, FR / Remote (FR)
€60K - €120K EUR
6+ years
Lucis
Founded:2025
Batch:Spring 2025
Team Size:3
Status:
Active
Primary Partner:Nicolas Dessaigne