Prolific records 18,697,671 monthly visits with -1.8% month-over-month growth and Paid pricing. Syncly records 12,542 monthly visits with -1.8% growth and Free Trial, Contact for Pricing pricing.
High-quality human data for AI training, evaluation, and research
AI social listening that reads what people say and show in short-form video
| Dimension / Metric | | |
|---|---|---|
| Official Domain | prolific.com | syncly.app |
| Pricing Model | Paid | Free Trial, Contact for Pricing |
| Monthly Visits | 18.7M (18,697,671) | 12.54K (12,542) |
| MoM Traffic Delta | -352.04K (-1.8%) | -226 (-1.8%) |
| Primary Market & Share | 🇺🇸 United States (48.8%) | 🇺🇸 United States (63.8%) |
| Direct Visits / mo | 12.98M | 4.38K |
| User Rating | 4.6 | 4.2 |
| 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 social listening that reads what people say and show in short-form video
Finds brand references spoken aloud, written on screen or shown visually as a product, so untagged posts and content without hashtags are still captured.
Describe the brand, product or topic you want to collect and define what counts as relevant, giving you control over what enters the dataset instead of relying on fixed keyword lists.
See recurring keywords, hashtags and sentiment to understand how people describe your brand or category, with every insight linked back to the original post.
Compare views and engagement next to the content and the creators driving them, which helps explain what made a conversation or a post take off.
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
Turn customer voices into confident decisions
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-native customer intelligence platform that turns every customer conversation into context
SpecialistAI-native customer intelligence platform that turns every customer conversation into context
SpecialistAI creator marketing platform for UGC capture and social listening
SpecialistAI creator marketing platform for UGC capture and social listening
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 web agents that watch your data sources and act on changes
SpecialistAI web agents that watch your data sources and act on changes
The operating system for UGC marketing and short-form analytics
The operating system for UGC marketing and short-form analytics
Real-time social sentiment and market intelligence across 40+ categories
Real-time social sentiment and market intelligence across 40+ categories
