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HumanCheck

Every response from a real, unique human

HumanCheck locks bots and repeat humans out before they ever reach your study.

See how HumanCheck protects studies
1

Each verified respondent receives a one-time passcode, created for their face alone and dropped onto their link. It fills itself in at your study’s gate.

One-time passcode
vyp_k2•••••••4qt
Filled in from their link. Used once, then dead.
2

Bots and returning humans get locked out. A duplicate face never earns a second passcode, and a spent passcode is dead forever.

Into the study
Blocked
Same face, second try
3

You only pay for real, first-time respondents. Blocked traffic never enters your data and never gets paid.

rsp_78421Verified92%
rsp_78422Blocked
rsp_78424Verified61%

Start here

Walk through it in order

1 How it works2 Alchemer setup3 The respondent experience4 The same mechanism, any platform

HumanCheck on Alchemer

Protect your study

A one-time password per verified human, enforced by Alchemer’s own gate before your first question.

1
Create
Create your verificationCopy your study linkCopy your passwords
2
Gate your study
Add the password gatePaste your passwordsSet it to fill itself in
3
Field it
Share your study linkSee what respondents seeBring it to any platform

Common questions

The questions researchers ask first

The check takes a few seconds, once. Verified respondents land in your study with the password already filled in, so there is nothing to type and nothing to remember. Most of what a check turns away is the traffic you did not want anyway.
About one to two cents a verification, charged once per human. On a $10,000 sample of $3 to $7 completes, the whole check is a rounding error, and one caught repeat taker pays for hundreds of verifications.
No. A blocked respondent never receives a password, never reaches your study, and never becomes a complete. Nothing to pay, nothing to clean out of your data.
No. No photo is shared with you or with Alchemer, only a yes or no. Your study receives a verdict and a password, never a face, a name, or contact details.
No, and it is not trying to. It proves the person is real and unique, not that they answered carefully. Keep your speeder and attention checks; this closes the door they cannot close.
A password is spent the moment it opens your study’s gate, not at completion. If someone starts your study and abandons it, that password is gone, and because the check recognizes their face, they simply receive a fresh one on their next visit. Honest respondents are never locked out of a study they never finished.