Like having a doctor
in the family

Demetra unifies your health data and uses AI to guide proactive care for you and your family. Starting with just your age, sex, and basic history. For free.

Why Demetra?

Growing up in a family of doctors in Cyprus, I watched my mother do something that no app, no hospital, and no health system does well. She paid attention. She caught things early because she cared continuously, not just when someone walked into a clinic.

Founder, Demetra Read the full story

Millions are silently living
with treatable disease

1 in 4
adults have undetected high blood pressure
80%
of people with pre-diabetes are completely unaware
2 in 3
who should be on cholesterol medication have never been offered it

Reactive healthcare is failing us.
We ought to do better for you and your loved ones.

Your Health Score

One number that tells you where you stand

A single, dynamic score reflecting your real-time health status. Tracking vitals, labs, and care compliance in one number. Know instantly if something needs your attention.

Connected Data

All your health data under one roof

Upload lab results, screenshots, and PDFs. Connect Apple Health, wearables, and smart scales. Answer a few questions and Demetra fills in the rest.

Proactive Care Plans

Never miss what matters

Demetra builds a personalized health timeline. Blood tests, vaccines, screenings, checkups. Month by month, always up to date. Know exactly what to do, when, and why.

Family Health

Keep an eye on the people you love

Add your parents, spouse, or children. Monitor their health scores, compliance, and alerts. Get notified when someone needs attention. Your family's health, in one place.

Always Vigilant

Always looking out for you

Demetra never stops working. It continuously monitors your data for concerning trends, undetected risks, and missed opportunities for care — and tells you when you need to know.

Demetra runs an expanding list of checks so that you don't have to

Translating clinical guidelines into plain language you can act on.

Are you at high risk for heart attack or stroke?
Should you be on cholesterol medication?
Are you up to date on cancer screenings?
Could your medications be interacting?
What vaccines should you get this year?
How do you compare to others like you?
Should you be screened for lung disease? — coming soon
Could you have undetected diabetes? — coming soon
Are your vaccines up to date? — coming soon

Doctor Sharing

Walk into your next visit prepared.
Your doctor will thank you.

Generate a QR code with a summary of your clinically relevant data. Your doctor scans it and instantly sees what matters: risk scores, trends, alerts, and device data.

Better data means better visits. Demetra reinforces your relationship with your clinicians — it doesn't replace it.

Our Vision

We believe proactive care should be the foundation of healthcare. The knowledge to prevent most chronic disease already exists — Demetra puts it to work for you, continuously and personally.

Proactive, not reactive

Runs clinical protocols in the background and surfaces what matters before it becomes a problem.

Personalized, not generic

Every recommendation is grounded in your actual data — not population averages or generic wellness advice.

Accessible, not exclusive

Genuine clinical value starting from basic information everyone already has, for free.

For the whole family

Your father's heart attack changes your risk profile. Demetra connects these dots across your household.

Built to scale

Deterministic, auditable protocols — not generic AI improvising answers. The same rigor, every time.

We are not building another chatbot. We are building the health system we wish existed.

Core Values

Demetra tells you what you need to hear, not what you want to hear. If your numbers are concerning, we say so clearly. No alarmism to drive engagement. No sugarcoating. Trust is built on truth.
Every recommendation traces back to published clinical guidelines: USPSTF, AHA, ACC, ADA. We do not invent health advice. We translate what the best physicians already know. When the evidence is uncertain, we say that too.
Your father's diagnosis changes what you should be screening for. Your child's vaccine schedule matters to the whole household. We build for the family unit because that is how health actually works.
We use highly-evidenced clinical logic that is auditable and versioned. We do not let language models improvise with your health. But we also do not hide behind perfectionism: we ship, we learn, we improve. Every week.
We do not sell it. We do not monetize it. We do not share it without your explicit permission. Your health information exists to serve you and the people you choose to share it with. Full stop.
The free tier is not a teaser. It delivers the full standard of care for prevention. We believe everyone deserves to know their risks and what to do about them, regardless of income.
We exist to make your relationship with your doctor better, not to replace it. Better data going in means better conversations, better decisions, and better outcomes. We strengthen the care team, we do not bypass it.

Built by physicians, researchers,
and operators

10+ years building clinical AI at the world's leading institutions. Published in Nature journals and JAMA. Backed by Y Combinator alumni.

Stanford Google Y Combinator MIT BCG

Your family's health,
handled.

Join the waitlist. We will let you know when Demetra is ready.