Become a Cousin

Start your family's own private site. You'll be its keeper — free — and only the relatives you invite can see it. We'll email you a link to confirm your address before anything is created.

Prefer to start from a grandparent? Build a tree — we search public records and fill in the first branches for you.

Invited by a relative? You don't need this — open their link, or type their family's own address (like theirname.probablycousins.com).

Probably Cousins is for people in the United States, Canada, Australia and New Zealand.

We'll email you a link to confirm your address. You choose your password there, and nothing is created until you open it.

Free, and always will be to join. Nothing about a living person is ever shown outside your family's own site, except the reference-person exception described in Privacy.

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