alternatives · prolific
Prolific vs Rapidata, measured on the same 300 tasks
We asked both crowds the same 300 questions with known answers. Rapidata reached the same label accuracy for $28 per 1,000 labels instead of $228, and collected 15,000 answers in about two minutes; Prolific's last answer arrived after 66 minutes. Method and data.
- $4per 1,000 responses
- 300,000+responses per hour
- 190+countries
01fit
Best for / not for
Rapidata is best for
- Labels where the majority of several answers counts: the same accuracy at about an eighth of the cost in our study.
- Preference data for evaluation and RLHF from thousands of different people, not a panel of 150.
- Skipping the study app: Rapidata renders the task.
Rapidata is not for
- Expert or long-form data: SFT demonstrations, reasoning traces, specialist review.
- Cases where every individual answer must be right.
- Studies on your own survey or web app, or follow-ups with the same participants.
02at a glance
Side by side
| Rapidata | Prolific | |
|---|---|---|
| Label accuracy per dollar (measured) | 99.73% correct for $28 per 1,000 labels (7 answers per label) | 99.69% correct for $228 per 1,000 labels (3 answers per label)source: Rapidata vs. Prolific: cost and quality on the same 300 tasks |
| Price per 1,000 answers | $4 | $76, with the reward sized at Prolific’s recommended £19.40 per hour at the time of the study. |
| Turnaround (measured) | 15,000 answers in about two minutes | 3,000 answers; the last arrived after 66 minutes |
| Single-answer accuracy | 91.6%; each label combines several answers | 98.0% |
| Task interface | Rendered by Rapidata | You build and host the study (about 16 engineering hours in our setup). |
| Pricing model | Per response, listed on the pricing page. | Participant pay (minimum £6.00 / $8.00 per hour) plus a platform fee, “usually 42.8% for corporate customers”.source: prolific.com/pricing |
| People who answered (measured) | 5,103 |
FAQ
Is Rapidata as accurate as Prolific?
Per dollar, Rapidata is more accurate. In our 300-task study, $28 bought 1,000 Rapidata labels at 99.73% accuracy; on Prolific, 99.69% cost $228. A single Rapidata answer is noisier (91.6% against 98.0%), so each label combines seven answers, which at $4 per 1,000 answers still costs about an eighth as much.
Sources
Competitor facts were last checked against these pages on 2026-11-06.