Prolific records 18,697,671 monthly visits with -1.8% month-over-month growth and Paid pricing. Veryfi records 104,470 monthly visits with -11.5% growth and Paid, Contact for Pricing, Free pricing.
High-quality human data for AI training, evaluation, and research
OCR and multi-modal document extraction APIs with built-in fraud detection
| Dimension / Metric | | |
|---|---|---|
| Official Domain | prolific.com | veryfi.com |
| Pricing Model | Paid | Paid, Contact for Pricing, Free |
| Monthly Visits | 18.7M (18,697,671) | 104.47K (104,470) |
| MoM Traffic Delta | -352.04K (-1.8%) | -13.53K (-11.5%) |
| Primary Market & Share | 🇺🇸 United States (48.8%) | 🇺🇸 United States (21.8%) |
| Direct Visits / mo | 12.98M | 37.78K |
| 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.
OCR and multi-modal document extraction APIs with built-in fraud detection
Multi-modal OCR APIs extract structured fields from invoices, receipts, bank statements, checks, W-2s, insurance cards and 100+ other document types with day-one accuracy.
Every document receives a fraud verdict with a color, a score and reasons returned under meta.fraud, covering AI-generated fakes, edited pixels, math mismatches, duplicate submissions and edited PDF layers and metadata.
Mobile (iOS and Android) and browser camera frameworks plus wrapper support and secure credit-card capture deliver clean, correctly cropped images before any API call.
Document classification and routing, PDF splitting, product/SKU-level intelligence and document-to-Markdown conversion are available as add-ons alongside the core OCR pipeline.
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.
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.
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.
SpecialistAI agents that run document-heavy business processes end to end
SpecialistEnterprise LLMs and document AI that turn unstructured work into data
SpecialistEnterprise LLMs and document AI that turn unstructured work into data
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.
SpecialistAgentic document platform that turns messy PDFs into LLM-ready structured data
SpecialistAgentic document platform that turns messy PDFs into LLM-ready structured data
High-precision document parsing and structured extraction API
High-precision document parsing and structured extraction API
SpecialistAI-led customer interviews and research insights at scale
SpecialistAI-led customer interviews and research insights at scale
