Prolific records 18,697,671 monthly visits with -1.8% month-over-month growth and Paid pricing. reAlpha records 43,871 monthly visits with -4.6% growth and Free pricing.
High-quality human data for AI training, evaluation, and research
AI-powered, zero-commission homebuying with a virtual agent
| Dimension / Metric | ||
|---|---|---|
| Official Domain | prolific.com | realpha.com |
| Pricing Model | Paid | Free |
| Monthly Visits | 18.7M (18,697,671) | 43.87K (43,871) |
| MoM Traffic Delta | -352.04K (-1.8%) | -2.1K (-4.6%) |
| Primary Market & Share | 🇺🇸 United States (48.8%) | 🇺🇸 United States (70.7%) |
| Direct Visits / mo | 12.98M | 5.66K |
| User Rating | 4.6 | 3.8 |
| 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.
AI-powered, zero-commission homebuying with a virtual agent
The platform is built to remove traditional buyer-agent commission from the purchase, keeping more equity with the buyer at closing.
A virtual agent handles guidance across search, offers and closing instead of requiring an in-person buyer's agent.
AI models analyse listings and buyer preferences to surface homes that fit budget, location and lifestyle.
Buyers get support through the full transaction, from initial search to closing, inside a single platform.
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.
AI property data, skip tracing and direct mail for real estate investors
AI property data, skip tracing and direct mail for real estate investors
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.
All-in-one real estate wholesaling platform with free skip tracing and AI deal automation
All-in-one real estate wholesaling platform with free skip tracing and AI deal automation
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
SpecialistBuy or sell a home online in one AI-powered workspace
SpecialistBuy or sell a home online in one AI-powered workspace
SpecialistConnects AI labs with domain experts for data collection, but lacks a self-service marketplace for bulk academic study participants.
SpecialistConnects AI labs with domain experts for data collection, but lacks a self-service marketplace for bulk academic study participants.
