Prolific records 18,697,671 monthly visits with -1.8% month-over-month growth and Paid pricing. xData records 0 monthly visits with — growth and Free pricing.
High-quality human data for AI training, evaluation, and research
Collect X data, power AI, earn $Wafer
| Dimension / Metric | | |
|---|---|---|
| Official Domain | prolific.com | chromewebstore.google.com |
| Pricing Model | Paid | Free |
| Monthly Visits | 18.7M (18,697,671) | 0 (0) |
| MoM Traffic Delta | -352.04K (-1.8%) | 0 (—) |
| Primary Market & Share | 🇺🇸 United States (48.8%) | 🌐 Global (—) |
| Direct Visits / mo | 12.98M | 0 |
| User Rating | 4.6 | 3.8 |
| Supported Platforms | Website | Browser Extension |
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.
Collect X data, power AI, earn $Wafer
Collect content data directly on X (Twitter) while you browse, without leaving your normal workflow.
Get compensated in $Wafer tokens for the data you contribute to the DIN network.
The extension plugs your browser into DIN, a modular AI-native data pre-processing layer.
A lightweight, user-friendly Chrome extension designed to make data contribution accessible.
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.
One browser agent that combines every major AI model with web automation
Agentic web scraper that turns any page into ready-to-use data
Agentic web scraper that turns any page into ready-to-use data
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.
SpecialistAI-led customer interviews and research insights at scale
SpecialistAI-led customer interviews and research insights at scale
Free AI browser agent that works anywhere you're signed in
Free AI browser agent that works anywhere you're signed in
Scrape any website by chatting with it in plain English
Scrape any website by chatting with it in plain English
