DNA Test vs Facial AI: Which to Choose for Resemblance?
To understand family resemblance, two technologies coexist: DNA tests (23andMe, MyHeritage, AncestryDNA) and AI facial recognition. Which to choose? For what purpose? Here's the honest comparison, with no PR fluff.
What each technology actually measures
The two tools don't measure the same thing at all. Common confusion.
DNA test: analyses your raw genetic code. Output: percentage of ethnic origins (40% European, 30% North African, etc.), potential genetic diseases, kinship with other test-takers, sometimes predicted traits (height, probable eye colour).
Facial recognition: analyses the visible geometry of your current face, and compares it to other faces. Output: resemblance score (%) with another person — overall and trait by trait.
DNA looks at origin and potential. Facial AI looks at the visible result today. Neither is "better" — they answer different questions.
Side-by-side comparison
| Criterion | DNA Test | Facial AI |
|---|---|---|
| Price | €60-150 per person | €0-5 per analysis |
| Time | 3-6 weeks | 30 seconds |
| Material | Saliva sample | 3 photos |
| Reliability | Very high (objective genetics) | High on visible geometry |
| Output | Origins, diseases, kinship | Resemblance score |
| Privacy | ⚠️ DNA stored, sometimes resold | Deletable photos, GDPR-compliant |
Discover who you really look like
Try the Family Plan — €4.99When to choose a DNA test
The DNA test is the right answer for:
- Knowing your ethnic origins across generations (useful for genealogy, identity)
- Detecting medical predispositions (cancer, Alzheimer's, some rare diseases)
- Finding biological family (adoption, unknown parents)
- Testing paternity or siblinghood scientifically and legally
The DNA test is the scientific gold standard for these uses. No visual AI can replace it.
When to choose facial AI
AI facial recognition is the right answer for:
- Knowing who your child visibly looks like today (dad, mom, grandparent)
- Energising a family meal or a fun gift
- Quickly comparing two faces with no commitment (free test in seconds)
- Tracking resemblance over age (rerun the test at 1, 5, 15 years)
- Testing with archive photos (your grandfather at your age, you with your child)
Facial AI is the playful and social tool for resemblance. It doesn't replace a DNA test, but it answers 90% of the questions families actually ask.
Complementarity: why not both?
The tools don't oppose each other, they complement. Ideal use case:
- DNA test once to understand your deep origins (€100 Christmas gift, do at 30)
- Facial AI several times a year for the visible and playful dimension (€3.99-4.99, do at family events)
Different prices, different moments. The DNA test is an event, facial AI is a habit.
Where Look Like Me sits in this
Our Look Like Me LLM Engine belongs to the second category. We don't do DNA testing — we don't read your genetic code. We analyse 3 photos, compute a resemblance score, return it in 30 seconds for €0 (one free analysis) or a few euros for a family pack.
Our goal isn't to replace 23andMe or MyHeritage. It's to give an instant answer to "who does my child look like?" — the question everyone asks daily, and one nobody had a better answer to than grandma's eye.