(or your cousin. we're not judging.)
Find out if you two are related, and whether you carry the same hidden genetic condition, before you say "I do." Private, consent-first, done from home.
Most couples only ever think of the first one. The second matters just as much, even if you've never met each other's families.
We compare your two DNA files and tell you one thing: related or not, and roughly how close. Siblings, half-siblings, cousins or strangers.
Total strangers can carry the same hidden condition, like cystic fibrosis, SMA, sickle cell or thalassemia. If you both do, each pregnancy has a 1 in 4 chance of being affected.
do one. do both. your aunties will be thrilled.
Have you two already done a DNA test (AncestryDNA, 23andMe, MyHeritage)?
Order two AncestryDNA kits. They're the biggest DNA network and regularly on sale. Prefer another brand? Compare kits.
Results take about 4 to 8 weeks. Then download your raw DNA files. We'll show you exactly where.
Invite your person, both upload, and get a single shared result. Related or not, and how close.
Grab your raw DNA file from your testing company's settings. Takes two minutes. How to download it.
Any major kit works with us. AncestryDNA is usually the cheapest on sale. Results take about 4 to 8 weeks.
You both upload and get one shared result. Neither of you sees the other's raw DNA.
Each of you downloads your raw DNA file from Ancestry, 23andMe, MyHeritage or FamilyTreeDNA. Here's how.
You each get a private link. Nothing runs until you both say yes.
Related or not, and roughly how close. Both files are deleted right after.
What's a second cousin once removed? Pick how you're each related to a shared ancestor and get the answer, the DNA you'd likely share, and whether you could legally marry.
Work out your cousin →Type the shared cM from your DNA match list and see what you probably are to each other.
Decode a DNA match →State-by-state map of US cousin marriage laws, updated for 2026. Spoiler: second cousins are legal everywhere.
Check your state →Zodiac signs, gotra and a very well-informed aunty. Totally unscientific, highly shareable. Then do the real one.
Test your match →Relatives are more likely to carry the same hidden recessive gene. One copy is harmless. A baby who gets the same one from both parents is where trouble shows up.
Birth-defect risk for babies of unrelated parents vs. first cousins. Double, but still low in absolute terms.
The chance per pregnancy of an affected baby when both partners carry the same recessive condition.
Excess risk of early death or severe disability in children of first-degree relatives. The one to rule out.
Sources: Bennett et al., Journal of Genetic Counseling, 2002; Sheridan et al., The Lancet, 2013 (Born in Bradford); ACOG Committee Opinion on carrier screening; Shared cM Project averages.
Checking family lines before marriage isn't new. Cultures have done it for centuries with horoscopes, family registers and very well-informed aunties.
Classical rules rule out marriage within seven generations on the father's side and five on the mother's. Plot twist: gotra only tracks dad's line. DNA checks all of them.
Since 1983, couples swap anonymous ID numbers and get one answer back: compatible, or not. That's a carrier check, and the idea we're bringing to everyone.
With one national genealogy database, Icelanders built an app that lets you bump phones to see if you're related, before things get serious.
screenshot one. tag your cousin.
Your DNA is the most personal data you own. We use it for one comparison, then it's gone. We never sell it, and your partner never sees it.
We're launching in the US first. India, Pakistan, the UK, UAE and Canada are next, with local lab partners and thalassemia screening built in. Tell us where you are and we'll prioritize your country.
The private beta opens soon. Drop your email and we'll send you a spot, plus a link for your person.
(your secret's safe with us)
We'll email when the beta opens. Start working on how you'll ask your person to spit in a tube.
Compare your DNA. If you've both taken a consumer DNA test, download your raw data files and we compare them privately. If not, one or both of you take a kit first. You get one answer: whether you share DNA, and roughly how closely you're related.
The relatedness check tells you whether you two are family. The carrier check tells you whether you both carry the same hidden recessive condition. Unrelated couples can still be a carrier match, which is why the carrier check matters even if you're not related.
The relatedness check is $29 per couple at launch. Carrier check pricing depends on the lab panel and we'll show it before you order. Insurance often covers carrier screening if you're planning a pregnancy.
Each of you takes a consumer kit. We suggest AncestryDNA because it's often on sale, but 23andMe, MyHeritage and FamilyTreeDNA files work too. Compare the kits.
The relatedness check is informational, not medical. The carrier check is a clinical lab test ordered by a licensed physician and comes with access to a genetic counselor.
Then you'll know, and that's the point. First-cousin marriage is legal in about 17 US states and common around the world. See the laws, and talk to a genetic counselor about the real numbers before kids.
Never. You each see one shared result. Neither of you sees the other's raw data, and we delete both files after the relatedness check.
The US is first. The UK, Canada, India, Pakistan, the UAE and more are next, with local lab partners. Pick your country when you join and we'll tell you when we launch there.
Absolutely not. Though she'd probably be relieved.