Prolific records 18,697,671 monthly visits with -1.8% month-over-month growth and Paid pricing. Thor Data records 181,966 monthly visits with -3.5% growth and Free Trial, Paid pricing.
High-quality human data for AI training, evaluation, and research
Proxies and web data APIs for scraping and AI pipelines
| Dimension / Metric | | |
|---|---|---|
| Official Domain | prolific.com | thordata.com |
| Pricing Model | Paid | Free Trial, Paid |
| Monthly Visits | 18.7M (18,697,671) | 181.97K (181,966) |
| MoM Traffic Delta | -352.04K (-1.8%) | -6.55K (-3.5%) |
| Primary Market & Share | 🇺🇸 United States (48.8%) | 🇵🇱 Poland (8.8%) |
| Direct Visits / mo | 12.98M | 70.44K |
| User Rating | 4.6 | 4.3 |
| 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.
Proxies and web data APIs for scraping and AI pipelines
Access 100M+ rotating real-user IPs across 190+ countries at from $0.65/GB, with rotation and sticky sessions.
Use real 4G/5G mobile IPs for mobile-specific and hard-to-access targets with carrier-level diversity.
Pull accurate, real-time results from Google, Bing, and more, starting from $0.70 per 1,000 responses.
Deploy 120+ prebuilt scrapers, a stealth Scraping Browser, and web unblocking to collect data at scale.
Extensive cloud platform hosting pre-built scrapers, crawlers, and automation actors for data extraction.
Extensive cloud platform hosting pre-built scrapers, crawlers, and automation actors for data extraction.
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.
Free / Open-sourceDeveloper-first scraping API that crawls and converts websites into clean LLM-ready markdown or JSON.
Free / Open-sourceDeveloper-first scraping API that crawls and converts websites into clean LLM-ready markdown or JSON.
Developer API platform providing live web search, content fetching, cloud browsers, and agentic web automation.
SpecialistWeb search and crawling API engineered specifically for AI agents and LLM application integration.
Comprehensive web data infrastructure powerhouse offering extensive proxy networks and advanced scraping APIs.
Comprehensive web data infrastructure powerhouse offering extensive proxy networks and advanced scraping APIs.
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
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.
SpecialistSearch infrastructure providing URL-to-Markdown document readers, neural embeddings, and web search endpoints.
SpecialistSearch infrastructure providing URL-to-Markdown document readers, neural embeddings, and web search endpoints.
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.
