Prolific records 18,697,671 monthly visits with -1.8% month-over-month growth and Paid pricing. Sequel records 10,904 monthly visits with -1.1% growth and Freemium, Contact for Pricing pricing.
High-quality human data for AI training, evaluation, and research
Give your AI agents live business data they can trust
| Dimension / Metric | ||
|---|---|---|
| Official Domain | prolific.com | sequel.sh |
| Pricing Model | Paid | Freemium, Contact for Pricing |
| Monthly Visits | 18.7M (18,697,671) | 10.9K (10,904) |
| MoM Traffic Delta | -352.04K (-1.8%) | -116 (-1.1%) |
| Primary Market & Share | 🇺🇸 United States (48.8%) | 🇺🇸 United States (42%) |
| Direct Visits / mo | 12.98M | 4.41K |
| User Rating | 4.6 | 4.5 |
| 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.
Give your AI agents live business data they can trust
Hook up GA4, Google Ads, HubSpot, Stripe, Search Console, and warehouses or databases via OAuth or a key — read-only, with nothing to self-host.
Tell Sequel once what a qualified lead, active account, or blended CAC means for your team, and every agent applies the same definition every time.
Sequel returns the query it ran with each result, so you can verify a figure instead of trusting it blindly.
Runs over MCP, so one connection serves Claude, ChatGPT, Cursor, Codex, and other MCP clients without reconnecting sources.
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.
An agentic analytics platform that turns questions into governed, trusted answers
An agentic analytics platform that turns questions into governed, trusted answers
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.
Chat with your data to get analysis, charts, reports, and slides
Chat with your data to get analysis, charts, reports, and slides
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.
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-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.
The AI spreadsheet that connects to your data and explains its answers
The AI spreadsheet that connects to your data and explains its answers
AI-native business intelligence your whole team can actually trust
AI-native business intelligence your whole team can actually trust
SpecialistAI-led customer interviews and research insights at scale
SpecialistAI-led customer interviews and research insights at scale
