Real human data for AI training, evals, and research — in minutes
Estimated monthly website visits
Similarweb estimates for this domain, not active users. Only available observation months are shown; collection date is separate from the traffic period.
Collected Nov 11, 2026
This is our editors' assessment out of 5, not an average of user ratings. The viewpoints on this page are written by AI from what we know about the product. They are not customer reviews.
According to OpenAITools.app telemetry verified on 2026-11-11, Prolific (prolific.co) is an AI platform indexed under AI Research Tool generating 77.76K monthly visits with a month-over-month traffic delta of -24.51K (-24%). Its primary geographic market is United Kingdom (15% traffic share), and it operates on a Paid pricing model. Top competing alternatives by monthly volume include Scale (616.92K visits/mo), Tavily (990K visits/mo), Exa (1.06M visits/mo).
The gold standard for recruiting verified human participants for AI evals.
Participant fees can add up quickly for large preference tuning datasets.
Filtering criteria ensure we get actual domain experts, not bots.
Approval workflow can be tedious when weeding out low-effort responses.
AI-synthesized perspectives grounded in live site inspection, pricing structure, and category benchmarks — presented as editorial viewpoints rather than individual customer testimonials.
Access hundreds of thousands of vetted participants across 40+ countries, with demographic screening so you can target the exact population your study or evaluation needs.
Purpose-built workflows for collecting human preference judgments, red-teaming feedback, and benchmark ratings for large language and multimodal models.
Programmatic access that lets engineering teams pipe real human feedback into model evaluation and agent workflows without leaving their own tooling.
Launch a study in minutes, set quotas and reward levels, and scale sample sizes up or down while keeping response quality consistent.
Attention checks, prescreening, and platform-level anti-fraud measures help keep responses trustworthy and reproducible across runs.
Prolific started as an academic survey recruitment tool and has grown into one of the most widely cited sources of high-quality human data for AI development. Its core promise is representative, well-screened participants who sign up specifically to take part in paid studies, rather than a passive panel that ignores requests. Researchers pay per response, which makes budgeting and sample sizing straightforward.
On the AI side, Prolific positions itself around preference tuning, safety evaluations, and defensible benchmarks. The company publishes the HUMAINE framework for human-preference evaluation of large language models and maintains a leaderboard, alongside data products aimed at examining model behaviour with real human feedback from populations in many countries. For classic research, the platform supports academic studies, market and product research, audience finders, and managed services where Prolific helps source specialist cohorts such as healthcare or coding experts.
Prolific also operates the participant side of the marketplace: people sign up, are verified, and get paid to take studies on a flexible schedule. For builders, there are APIs and integrations that let teams pull human feedback directly into their evaluation pipelines.
Run side-by-side comparisons, Likert ratings, and red-team prompts at scale, then export clean structured labels for reward modelling, RLHF-style tuning, or safety evaluation.
Reach pre-screened participants matching your inclusion criteria, manage quotas, and pay per completed response without running a recruitment campaign yourself.
Run surveys, concept tests, and usability studies with audiences you can define by country, occupation, or specialist skill set.
Stand up repeatable human-evaluation pipelines with consistent sampling so results are comparable release over release.
Side-by-side telemetry comparison of competing AI tools in the same primary category
| Rank | AI Tool | Monthly Visits | MoM Growth | Direct traffic share | Pricing | Head-to-Head |
|---|---|---|---|---|---|---|
| ● | Prolific | 77.76K | -24% | 80% direct | Paid | Current |
| 1 | Scale | 616.92K | +12.5% | 31% direct | Contact for Pricing | vs Scale |
| 2 | Tavily | 990K | -0.8% | 49% direct | Contact for Pricing | vs Tavily |
| 3 | Exa | 1.06M | +16.8% | 57% direct | Freemium, Contact for Pricing | vs Exa |
| 4 | Extruct AI | 54.71K | -7% | 16% direct | Paid, Contact for Pricing | vs Extruct AI |
| 5 | Branded | 3.7M | +6.6% | 49% direct | Contact for Pricing | vs Branded |
| 6 | Thor Data | 181.97K | -3.5% | 39% direct | Free Trial, Paid | vs Thor Data |
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