Skip to main content

Research participants · Verified · US

Quality you can prove.

Run online studies with verified, fairly paid participants. Every response arrives with the evidence behind it, every sample with a signed report, and confirmed fraud is refunded automatically.

Run a study Take part in research
in your first year
15% academic fee
on every study
$10/hour floor
throughout
English & Spanish
SAMPLE PROVENANCE REPORT · study #EX-0001 Example
participants
300
payout-verified (L2+)
100%
ID-verified (L3)
22%
device + network checks passed
98.7%
flagged after review
4 → refunded
screening
census-matched, US
methodology
2026.5
sha256 9f2c…e41a (example) ✓ signature valid
Example report with illustrative values. Not real study data.

Every response comes with its evidence.

See why each submission can be trusted before you analyze it. Flags explain; they never reject anyone on their own.

  • Verified before they see a study Device and network checks, one verified PayPal account per person, and ID checks when risk or your study calls for it.
  • Signals from inside your survey Our snippet counts pastes, tab switches and typing speed, and can catch AI agents. It never records answers.
  • Fraud refunded automatically When we confirm fraud, you're refunded for that account's past 90 days of submissions. No ticket required.

How we check quality →

Participant Level Time Evidence
P-7K2M9QX4 L3 11:40 checks passed trusted
P-Q8T1VN6B L2 10:05 checks passed
P-H3ZD4W7R L2 2:51 under ⅓ of median time pasted 4 times
P-M6YC2K9J L2 9:12 shared device
FIG. 1 — The review queue: each submission with its verification level, time on task, and plain-language flags. Example data.

Human evaluation for AI, with the same proof.

Upload items, choose a task, and verified raters work through them. Gold items, raters per item, and agreement statistics are built in.

  • Four task types Pairwise preference, rubric rating, rewrite and labeling, with keyboard shortcuts.
  • Expert panels NPI-checked clinicians, licensed professionals, and test-qualified software engineers.
  • API and MCP server Spending caps on every token, so an agent can't overspend.

See Populiva for AI →

ITEM 4 OF 20PAIRWISE · EXAMPLE

Explain why the sky looks blue to a ten-year-old.

Response 1

Sunlight has every color in it. Blue light bounces around the air the most, so blue reaches your eyes from all over the sky.

Response 2

Rayleigh scattering is inversely proportional to the fourth power of wavelength, which…

1 Response 1 2 Response 2 3 About the same

Krippendorff's α
0.71
gold accuracy
94%
raters per item
3 / 3
FIG. 2 — The rater's screen and the task's results. Example data.

Published fees. No surprises.

Pay participants, plus a platform fee on what they earn. No subscription, no seats.

Platform fees, charged on top of participant pay
Platform Academic fee Commercial fee Participant pay floor
Populiva 15% first year 30% $10/hour
CloudResearch Connect 25% 40% $7.50/hour
Prolific 33.3% 42.9% $8/hour

From each platform's public pricing pages, checked on November 01, 2026. See the full comparisons

For researchers

Run your next study with proof.

Open a lab account and launch your first study today. No subscription, no setup fee, and every response arrives with its evidence.

Create a lab account Talk to us

  1. Open your lab

    Sign up with two-factor sign-in and invite your team. University and nonprofit labs get the academic fee.

  2. Add funds

    Pay by PayPal, or by invoice and bank transfer with a purchase order.

  3. Launch your study

    Paste your Qualtrics, jsPsych, Gorilla or other link, choose who can take part, and see the full cost before launch.

  4. Review with evidence

    Every submission shows its verification level, timing and quality flags. Confirmed fraud is refunded automatically.

Questions researchers ask

Will my IRB accept it?

We publish an IRB information page with sample consent language, a security page, HECVAT answers, and a data processing agreement template.

Which survey tools work?

Any tool with a link: Qualtrics, jsPsych, Gorilla, oTree, PsychoPy, LimeSurvey and more, with a setup guide for each.

How do I pay?

By PayPal, or by invoice and bank transfer with a purchase order. You see each study's full cost before you launch.

What happens if someone cheats?

Flags show you suspicious submissions to review. When we confirm an account was fraudulent, every lab it took part with in the past 90 days is refunded automatically.

Who are the participants?

Adults in the US who verified a PayPal account, one per person, after device and network checks. Studies can also require ID verification.

For participants

Take part in real research.

Studies from universities and research labs, at least $10 an hour, cash out to PayPal. Every rejection comes with a reason you can appeal, and we publish participant pay every month.

Join the participant waitlist How it works