Prolific
Research participant and data-labeling marketplace used by AI labs for high-quality human feedback.
Our Verdict
Gold standard for high-quality academic and RLHF data; overkill for bulk labeling where Scale or Toloka fit better.
Pros
- Vetted research-participant pool
- Transparent, fair pay for participants
- Used by major AI labs for RLHF data
- Strong reliability versus MTurk
Cons
- Higher per-response cost than MTurk
- Smaller pool than Amazon Mechanical Turk
- Best for research, not production labeling
- Demographic filters limited outside US/UK
When to Use Prolific
Good fit if you need
- Recruiting diverse participant panels for AI evaluation studies
- Collecting human preference data for RLHF training pipelines
- Running A/B studies on LLM output quality with real users
- Gathering behavioral data for training or fine-tuning AI models
Pricing
Price wrong?Prolific Pricing
- Pricing Model
- usage
- Free Tier
- No
- Entry Price
- —
- Enterprise Available
- No
- Transparency Score
- —
Beta — estimates may differ from actual pricing
Estimated Monthly Cost
$25
Estimated Annual Cost
$300
Estimates are approximate and may not reflect current pricing. Always check the official pricing page.
Lock-in Assessment
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