If you have narrowed your DNA decision to AncestryDNA and MyHeritage, you have the right shortlist for general Scottish research—these are the two autosomal tests most worth your money for finding cousins and confirming lines. They differ enough that the better first choice depends on your goal, though for Scottish ancestry the smartest approach often uses both. This is a head-to-head on the points that count for Scottish roots. (For a specific surname or clan line, note that neither is the answer—that calls for FamilyTreeDNA’s Y-DNA projects.)
Database size: AncestryDNA wins
In match-based genealogy, database size is the single biggest predictor of success, because the relative who holds your answer can only help if they are in the same pool. AncestryDNA’s database is the largest in the industry, and it is especially dense with testers in North America and Australasia—precisely where the Scottish diaspora settled. For a descendant hunting Scottish-diaspora cousins, that density is a decisive advantage, and it makes AncestryDNA the natural first test for most people with Scottish roots abroad.
Where MyHeritage helps
MyHeritage earns its place through features rather than raw size, and two stand out for Scottish research:
- Free DNA uploads. MyHeritage lets you upload your AncestryDNA raw file at no charge and see your matches; a modest fee unlocks the advanced tools. So the efficient play is often “test at Ancestry, upload to MyHeritage”—two databases for roughly the price of one kit.
- A chromosome browser. AncestryDNA omits this; MyHeritage includes it, giving you the segment-analysis tool that helps confirm exactly how a match relates to you.
MyHeritage’s stronger European presence is a further modest plus, though for Scottish ancestry most of the relevant matches—being in the anglophone diaspora—appear well on Ancestry too. The free upload and the chromosome browser are the real reasons to add MyHeritage.
Ethnicity estimates: both broad
Neither company can tell you which parish your ancestors came from, and for Scottish results both face the same particular difficulty: as we explain in Scottish DNA ethnicity results, the peoples of the British Isles overlap so heavily that the tests struggle to separate Scottish from Irish, English and Welsh ancestry. So your result is likely to read as a broad British-Isles blend rather than a precise “Scottish” figure, whichever company you use. Treat the estimate as an interesting headline, not evidence, and let the records provide the real answers about where your family lived.
Tools for making sense of matches
Both companies offer tools to suggest how a match connects to you—AncestryDNA’s ThruLines and MyHeritage’s Theory of Family Relativity—which read shared trees and records to propose a common ancestor. Both are useful starting points and both can be fooled, so use them to point toward a likely link and then prove or disprove it in the records. Ancestry’s larger tree pool tends to generate more hints for diaspora families; MyHeritage’s chromosome browser lets you check the genetic evidence more closely once you have a hypothesis.
Both kits, current prices and the upload walkthrough are on the Scottish DNA hub. Already have matches? Anchor them to records with connecting DNA to Scottish records.
Our recommendation
- Start with AncestryDNA for the largest pool of Scottish-diaspora matches and strong tree tools.
- Upload the free raw file to MyHeritage to gain a second database and a chromosome browser at little extra cost.
- For a surname or clan line, add FamilyTreeDNA Y-DNA and the relevant project—the tool the autosomal tests cannot replace.
- Build the tree in the documents, using both tools to find candidate relatives and the records to prove every link.
Privacy and your data
Before testing with either company, spend a few minutes on the privacy settings, because your genetic data is uniquely personal and worth handling deliberately. Both AncestryDNA and MyHeritage let you download your raw data file and delete your data, and both give you choices about participating in research and about how your information is used and shared. Read the current terms, decide whether to opt in or out of research uses, and keep your own copy of the raw file so you are never locked into a single company. The wider industry—most visibly the upheaval at 23andMe—has given everyone good reason to take genetic-data privacy seriously, and a little attention to the settings now saves worry later. None of this should deter you from testing; it simply means testing as an informed participant rather than clicking through without looking.
The verdict for Scottish roots
For most people with Scottish ancestry, the honest verdict is not “either/or” but a sequence: begin with AncestryDNA for its unrivalled pool of Scottish-diaspora matches and strong tree tools, then upload your raw file free to MyHeritage to add a second database and a chromosome browser at little extra cost. That combination covers the great majority of what autosomal testing can do for Scottish research—finding cousins and confirming lines—for barely more than the price of one kit. And if your real question is a particular surname or clan line, remember that the decisive tool is neither of these but FamilyTreeDNA’s Y-DNA and its clan and surname projects, which reach where the autosomal tests cannot. Match the test to the goal, use the free upload to double your reach, and let the records do the proving.
