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Your health data stays with you.

Your documents are analysed on your phone, by our own algorithms. They are not sent to any server.

Health data leaks. Often.

15 million

patients exposed after a hack of software used by doctors in private practice, in late 2025.¹

33 million

people in France hit by a leak of direct-billing data, in February 2024.²

8,613

data breaches notified in France in one year, or 24 a day.³

A password can be changed. So can an address. An illness, a treatment, being HIV-positive: never. Health data, once exposed, stays exposed for ever.

This is a choice, not a constraint.

It would have been quicker to send your documents to a remote service and let an artificial intelligence answer. We developed our own algorithms precisely to avoid that. Your test results, your prescriptions, your quotes are never transmitted, never stored anywhere but on your device, never read by anyone.

The data that never leaks is the data that never leaves.

What this means in practice

  • It works without the internet. The analysis happens inside your phone, even in aeroplane mode.
  • No data centre involved. Nothing is sent, and no server is powered or cooled to analyse your documents. Only your phone does the work, for a few seconds.
  • Your archives are encrypted on your device. Neither we, nor a service provider, nor an insurer can access them.
  • No advertising, no selling of data. Our business model is subscriptions. Not your data.
  • No diagnosis, no treatment recommendations. We explain, we don't prescribe.

Online AI or KlairBio?

Many people already show their results to an online AI. It gives information. But your documents leave your phone, and the conversation doesn't keep track of your results over time.

An online AI KlairBio
Your documents Go to servers you know nothing about Stay on your phone
Your results over time No structured tracking of your values History and trend charts*
When in doubt May answer wrongly, with confidence Tells you so, rather than guessing
What you need to be able to do Ask the right question Take a photo
Without internet Impossible Works in aeroplane mode
Your documents
An online AIGo to servers you know nothing about
KlairBioStay on your phone
Your results over time
An online AINo structured tracking of your values
KlairBioHistory and trend charts*
When in doubt
An online AIMay answer wrongly, with confidence
KlairBioTells you so, rather than guessing
What you need to be able to do
An online AIAsk the right question
KlairBioTake a photo
Without internet
An online AIImpossible
KlairBioWorks in aeroplane mode

*With the Solo and Family plans.

Our figures

KlairBio today:

225lab tests explained
6languages
8countries: France, Belgium, Germany, Spain, Portugal, Italy, United Kingdom, Ireland

Sources

  1. French Ministry of Health, quoted by Le Monde Informatique, February 2026: leak of the administrative data (identity, contact details) of about 15 million patients after medical software was hacked (late 2025).
  2. CNIL (French data protection authority), 7 February 2024: data breach at two direct-billing (tiers payant) operators, more than 33 million people affected.
  3. Written question no. 14767, Assemblée nationale, 17th legislature: 8,613 data breaches notified between September 2024 and September 2025.