Ancestry vs FamilySearch: Paid Depth vs Free Breadth

Most comparisons of these two get stuck on price, which is the least interesting difference between them. One is free and one is not; that is the first sentence, not the analysis.

The difference that will actually shape your research is structural: FamilySearch has one tree that everybody edits, and Ancestry gives you a private tree that only you edit. Everything downstream follows from that.

The short answer. Use FamilySearch regardless, because it is free, global, and its full-text search now reads handwriting across nearly two billion images. Add Ancestry if your ancestors are in the United States, the United Kingdom, Ireland, Canada or Australia, if you want a tree nobody else can alter, or if you want the largest DNA match pool. The tree model, not the price, is the thing to think hardest about.

One shared tree versus your own tree

FamilySearch runs a single collaborative tree covering all deceased people, which anyone with an account can edit. When it works, it is remarkable: a distant cousin in another country has already documented three generations you had never traced, with sources, and it is simply there waiting for you.

When it does not work, someone with more confidence than evidence merges your carefully sourced great-grandmother with a different woman of the same name, and your work is gone until you notice and unpick it. This is a known and long-standing complaint, and FamilySearch has been responding to it: recent work has focused on better merge tooling, data-quality suggestions, and warnings before an edit that looks likely to degrade existing information.

Ancestry gives you a private tree. Nobody else can edit it. The cost of that safety is isolation: no cousin is going to quietly hand you three sourced generations, and you can duplicate work that somebody else already finished. You can share a tree deliberately, but the default is solitary.

Neither model is correct. They are different bets about whether strangers help or harm you more, and the right answer genuinely varies by family and by how well documented your lines already are.

Coverage overlaps more than either would like to admit

A lot of what is on Ancestry is also on FamilySearch, because both have digitised from the same underlying archives and microfilm. The differences are real but narrower than the price gap suggests.

Ancestry is generally deeper for US vital records, US and UK censuses, military records, immigration and naturalisation, and British and Irish parish registers. It also holds exclusive partnerships and newspaper material through related properties.

FamilySearch is genuinely global in a way Ancestry is not. Its collections reach hundreds of countries, including places with little commercial digitisation interest, and it continues to expand in regions the paid platforms largely ignore. Recent expansion work has covered countries including Belgium, Cameroon, Malawi, South Korea and Uruguay, alongside large additions across dozens of other countries.

The full-text search changes the comparison. FamilySearch's AI handwriting search now covers nearly two billion images, up from roughly 100 million at launch, and it searches inside documents rather than only their name indexes. Witnesses, neighbours, property descriptions and marginal notes are findable in collections nobody ever formally indexed. It started with English, Spanish and Portuguese, with further languages announced. Ancestry has comparable technology on its own collections. The point is that a free platform now has a capability that would have been a premium feature a few years ago.

One thing to say plainly: a great deal of FamilySearch's imagery is viewable only at a Family History Centre or an affiliate library, because of contracts with the archives that hold the originals. Free does not always mean free from your sofa.

Side by side

How to decide

Start with FamilySearch, always. It is free. There is no version of this where skipping it is sensible, whatever else you buy.

Add Ancestry if the geography matches. North America and the British Isles are where the subscription most clearly earns its money.

Add Ancestry if you want a private tree. If the thought of a stranger merging your ancestors is intolerable, that alone is a reasonable basis for paying.

Add Ancestry if you want DNA matches. FamilySearch has no DNA product at all.

Check your local Family History Centre before concluding a FamilySearch collection is unavailable. Restricted images are often viewable there, free.

Use the shared tree defensively. Attach sources to everything you add. A well-sourced entry is much harder for someone to overwrite casually, and it is the only real protection the model offers.

One disclosure, and the gap both leave

We make KleioBase, which is not a records platform and is not an option in this comparison. Nothing above was written to route you here.

The gap they share: both are built around finding records, and their intelligence points outward at their own collections. Neither reasons over the evidence you have already assembled. Once you hold forty documents from five sources in three languages, the remaining work is reconciling them with each other, and a hint engine aimed at someone else's index does not touch it. Our comparison with FamilySearch's full-text search sets out where that boundary actually sits.

That is an aside. The decision on this page is whether to pay Ancestry on top of a free FamilySearch account, and for a great many people the honest answer is to spend three months on FamilySearch first and find out whether you need to.

Where to start this weekend

Create the free FamilySearch account if you do not have one, then do two things before considering any subscription.

Search the shared tree for your most distant confirmed ancestor and see whether somebody has already extended the line. Check their sources rather than their conclusions.

Then run a full-text search on a surname plus a place, and read what comes back from collections that were never name-indexed. That capability is the newest thing here and most people have not tried it yet. If it turns up nothing for your regions, that absence is itself useful, and it tells you whether Ancestry's paid depth is likely to do better. The wider landscape guide covers what else fits around the two.