Prolific records 18,697,671 monthly visits with -1.8% month-over-month growth and Paid pricing. Scorecard records 6,344 monthly visits with +8.2% growth and Freemium pricing.
High-quality human data for AI training, evaluation, and research
The simulation platform for agent self-improvement
| Dimension / Metric | | |
|---|---|---|
| Official Domain | prolific.com | scorecard.io |
| Pricing Model | Paid | Freemium |
| Monthly Visits | 18.7M (18,697,671) | 6.34K (6,344) |
| MoM Traffic Delta | -352.04K (-1.8%) | +481 (+8.2%) |
| Primary Market & Share | 🇺🇸 United States (48.8%) | 🇺🇸 United States (93.7%) |
| Direct Visits / mo | 12.98M | 2.47K |
| User Rating | 4.6 | 4.4 |
| Supported Platforms | Website | Website |
High-quality human data for AI training, evaluation, and research
Filter participants by detailed demographic, professional, and behavioural criteria and reach narrow or representative samples rather than a generic crowd.
Collect human preference data for model fine-tuning, run safety evaluations and red-teaming, and use a feedback API to plug humans into automated pipelines.
Attention checks, honesty screening, and approval workflows help filter out careless or fraudulent responses before you analyse results.
Publish a study and begin collecting responses quickly, with tooling that supports screening, quotas, and longitudinal designs.
The simulation platform for agent self-improvement
Run your agent through thousands of realistic scenarios and get scored feedback in minutes instead of waiting weeks for expert log review.
Create structured experiments and test ideas quickly in an AI laboratory before committing to a change.
Start from a validated metric library of industry benchmarks, customize proven metrics, or build your own to track what matters.
Create, test and track your best-performing prompts in one place, keeping a history and a single source of truth for the team.
Large consumer panel for market research surveys, but lacks Prolific's specialized focus on academic studies and AI tuning.
Large consumer panel for market research surveys, but lacks Prolific's specialized focus on academic studies and AI tuning.
GenAI-native end-to-end QA agent that plans, writes and heals tests in plain language
SpecialistThe environments frontier AI trains on, and the agents that do the recurring work
SpecialistThe environments frontier AI trains on, and the agents that do the recurring work
Enterprise-grade data annotation and AI alignment workforce, but less self-serve for academic study recruitment and casual surveys.
SpecialistAI data infrastructure for building production-grade models
SpecialistAI data infrastructure for building production-grade models
Track, evaluate, and ship AI models and agents in one connected environment.
Track, evaluate, and ship AI models and agents in one connected environment.
SpecialistSpecializes in video-based consumer interviews and AI qualitative analysis, but less focused on quantitative academic survey panels.
SpecialistSpecializes in video-based consumer interviews and AI qualitative analysis, but less focused on quantitative academic survey panels.
SpecialistSources verified B2B professionals and healthcare experts for specialized research, but lacks broad general-population academic panels.
SpecialistSources verified B2B professionals and healthcare experts for specialized research, but lacks broad general-population academic panels.
Free / Open-sourceAgent observability, evaluation, and continuous improvement for production AI
Free / Open-sourceAgent observability, evaluation, and continuous improvement for production AI
Attack-led AI security testing and red teaming
Attack-led AI security testing and red teaming
Free / Open-sourceOpen-source data labeling and evaluation platform for AI workflows, but requires bringing your own annotation workforce.
Free / Open-sourceOpen-source data labeling and evaluation platform for AI workflows, but requires bringing your own annotation workforce.
Free / Open-sourceBuild, simulate, evaluate and monitor self-improving AI agents
Free / Open-sourceBuild, simulate, evaluate and monitor self-improving AI agents
