adults have undetected
high blood pressure
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.
Built by experienced physicians, researchers, and operators
We have spent 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
Millions are silently living with treatable disease
of people with pre-diabetes
are completely unaware
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 that reflects your real-time health status — tracking vitals, labs, and care compliance in one number. Know instantly if something needs your attention.
All Your 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 — every piece of your health picture, always up to date.
Proactive Care Plans
Never miss what matters
Demetra builds a personalized health timeline — blood tests, vaccines, screenings, checkups — month by month, always current. 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 whole family's health, in one place.
Doctor Sharing
Walk into your next visit prepared
Generate a QR code with a clinical summary your doctor can scan in seconds — risk scores, trends, alerts, device data. Better data means better visits. For both of you.
Why Demetra
Demetra is a doctor, a mother, and the person her whole family calls when something feels off.
She reviews your labs, catches the patterns other doctors miss, and reminds your dad to check his blood pressure before things go wrong. She watches over everyone — not because it's her job, but because she cares. Not everyone has a Demetra in their corner. We built this so everyone can.
Demetra runs an expanding list of checks in the background so that you don't have to
Demetra runs dozens of checks in the background, translating clinical guidelines into plain language you can act on. New agents ship as we build the proactive health OS.
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?
Built by physicians and scientists with 10+ years of clinical AI experience, behind every check.
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.