Affordable Sibling DNA Test $135 | Precise – Private |

A Sibling DNA Test Determines Full Sibling – Half Sibling – No Relations!

We offer precise sibling tests (Up To 35 Markers) from most trusted USA lab.

What Is A Sibling DNA Test?

Sibling DNA testing analyzes the DNA of alleged brothers or sisters to determine if full siblings, half siblings or not related.  A sibling DNA analysis can help prove or disprove the paternity or maternity indirectly when the alleged father or mother is unwilling or unavailable to be tested. Our DNA test for siblings can analyze Up To 35 Markers, which is almost 50% more markers than our competitor’s 24 marker test. 

Furthermore, our sibling DNA test is a perfect solution to confirm or deny ®, ®, or’s ® genealogy test results. These heritage & ancestry kits only indicate that you may have found a lost brother or sister, but most importantly we can prove or disprove the findings. 

Our results will show if the participants are full siblings (both parents in common), half siblings (one parent in common) or not related as brother and sister. This is accomplished by actually comparing one person against another, and not just by using an ancestry or heritage database.

Very Affordable Prices – FREE 2-WAY RUSHED SHIPPING Fast, Accurate, Private Results

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4 Reasons To Buy Your Sibling DNA Test At


Our laboratory performs 3 of 4 private sibling DNA tests in the USA. AS SEEN ON TV shows like Maury®, Steve Wilkos® & Paternity Court®. Our full and half sibling test provides the 100% accurate answers you can trust to be real!

Most Trusted & Accurate Test Results


Our  laboratory is fully accredited, analyzes more markers (Up To 35 Markers), and utilizes only the most advanced test methods. Our legal sibling test produces fully accredited results for legal or USCIS immigration matters.

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FREE USPS RUSH DELIVERY of collection kits with FREE rush return delivery. And, paternity results can be ready in 1-day. Some entities want you to prepare your own kits, but Don’t Risk Compromised Samples.

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We provide only high a quality premium test at very inexpensive prices. Don’t risk false or inconclusive results by buying from small and unproven laboratories. Our lab performs all our own analysis in-house.

The Only Thing Cheap About Our Test Is The Price

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Full Siblings – Half Siblings – Not Sure If Related

A full sibling test assumes there is one known parent in common and tests to conclusively determine if both parents are shared.

A half sibling test assumes one parent is different and will determine if one or no parent is shared.

A test for both full and half sibling will let you know whether one, both, or no parents are shared. If you are not sure whether the mother and or father are shared, performing both a full and half sibling DNA test gives the most complete picture of the relationship. Our precise results may provide the adoption answers you seek from a lab you can trust.

How accurate is DNA testing for siblings?

Sibling DNA testing is 100% accurate and can produce very conclusive results.  Generally,  the analysis can be performed with only two or more brothers or sisters, however we recommend adding any available known parent(s) to help increase conclusiveness.  Please feel free to call us at (877) 786-9543 for consultation.

If no known parent(s) can be added to the DNA test, you may consider the option to analyze additional DNA markers(Up To 35) to ensure you get the most conclusive answer possible.

The Testing Process Is Easy:

Upon receipt of order, we will rush you a FREE sterile DNA collection kit

Sample Collection:
Sampling is done through a cheek swab.

Sample Analysis:
When  samples arrive at lab, you will be notified via email.

Results Reporting:
Results are emailed and/or mailed to the address on file.

Can you also test other family members?

YES! A grandparent DNA test can be performed with an alleged grandparent(s) and grandchild.  An avuncular DNA test  is performed with a full sibling of the alleged parent (Aunt/Uncle). Lastly, you may also perform a family reconstruction DNA test if multiple paternal relative are available.

Can you test types of genetic samples?

YES, ear wax, finger or toe nail clippings, hair (w/ root ball), mucous on a tissue, and toothbrushes are common forensic DNA samples. For more information & pricing please call us at toll free (877) 786-9543.

Non-Legal Sibling Test

Legal Sibling Test


YES, a sibling DNA test can conclusively determine you’re a full or half sibling thus proving or disproving paternity.

No, in-fact unless the individuals are identical twins all siblings have unique genetic profiles.  The combination of genetic markers inherited from both parents makes every brother or sister unique.

If both individuals to be tested are males, a Y-STR test is a good option to consider. The Y-STR male line DNA test compares the unique Y-Chromosome (Like A Fingerprint) every father passes to his male child. A Y-STR analysis will always produce a conclusive “Yes” or “No” as to whether or not the alleged male sibling comes from the same male line.

Likewise, an mtDNA female lineage test provides a conclusive answer regarding a relationship on the maternal side.

When someone wants to see if they are a sibling or  a cousin, a sibling DNA test may not produce the most conclusive result. Therefore, we recommend a paternity or maternity test with the parent in question as the best solution.  Call us at (877) 786-9543, and we can help guide you to the best DNA test.

YES! However, our mission is to first provide the most reliable & accurate results at the cheapest prices, and as quickly as possible.

Some promise one day results, but in reading the fine print, their disclaimer says it can take 3-5 days.

Having said that, we do offer a 1-day processing option if at least 1 mom is included in the test. (Please call to request 1-day service option)

Sometimes you have to do the DNA collection right away or lose the opportunity to obtain a sample. In such cases, you can use regular Q-tips  for the collection, however this is not ideal. For this reason, PaternityUSA will rush a medically sealed sterile kit to you FREE.

YES,  commonly used forensic DNA samples include ear wax, hair (must have the root ball attached), mucous on a tissue, finger or toe nail clippings, and toothbrushes. Please contact us at (877) 786-9543 for more info.

Orders before 2:00 PM EST, will be rushed a sterile kit via traceable USPS for FREE Monday through Friday to physical addresses in the contiguous USA. Orders received after t2:00 PM EST ship the following business day.

If siblings are in different cities or states, when ordering, simply provide the additional address, and we will send the other participant a separate collection kit. The reference numbers and bar codes link the samples when received in lab.

YES, our legal sibling packages  are valid in cases for child support, visitation rights, to change name on the birth certificate, estate, wills, probate situations, and/or any other type case where proving the relationship is required.

Further, if you need the results for immigration, CRBA, passport, the embassy, USCIS/ICE or Dept. Of Homeland Security as evidence of the biological relationship, then order the immigration package.

We Look Forward To Serving You!

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Choose the type of relationship that you need DNA answers for, and who is available to participate.


Decide if you need answers for just personal knowledge or if you need answers for court or other legal matter.


Place order online on our secure shopping cart with credit card or PayPal.

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