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Give every pet a safe homecoming

If your dog or cat ever slips out of a door, gets dropped at a shelter, or wanders into a vet — CritterKey brings them back to you. An unhackable biometric identity, free for owners, verified in seconds by any shelter or vet.

2 minto register a pet

100%tag-free recovery

Freeforever for pet owners

We email only when CritterKey launches or a shelter near you goes live. Never spam.

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How it works

A safe return, in three steps

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Capture Biometrics

Snap a clear photo of your pet's nose or face. We turn it into a one-of-a-kind identity — like a fingerprint, only theirs.

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Link to Your Pet

Add species, breed, microchip ID, and your contact info. One profile, permanently linked.

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Instant Verification

Any shelter, vet, or smart door that has CritterKey can prove it's your pet and call you home. — in seconds, no tags needed.

Why biometrics beat tags & chips

Brought to a shelter? We call you. — Cloud-bound identity, never lost with a broken collar or chip.

Unforgeable — each pet's nose print is unique, like a human fingerprint

Only the right pet gets in. — Smart doors recognise your pet by nose print; strangers stay out.

If they ever get lost, you'll get them back.

Free for every pet owner. Register one pet in about two minutes.