Prolific records 18,697,671 monthly visits with -1.8% month-over-month growth and Paid pricing. sliiidea records 337 monthly visits with -85.1% growth and Free pricing.
High-quality human data for AI training, evaluation, and research
Capture your ideas, then swipe to see which ones really matter
| Dimension / Metric | | |
|---|---|---|
| Official Domain | prolific.com | sliiidea.com |
| Pricing Model | Paid | Free |
| Monthly Visits | 18.7M (18,697,671) | 337 (337) |
| MoM Traffic Delta | -352.04K (-1.8%) | -1.93K (-85.1%) |
| Primary Market & Share | 🇺🇸 United States (48.8%) | 🇮🇩 Indonesia (100%) |
| Direct Visits / mo | 12.98M | 136 |
| User Rating | 4.6 | 3.9 |
| 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.
Capture your ideas, then swipe to see which ones really matter
Capture thoughts instantly with a simple interface so nothing is lost; ideas drop straight into your evaluation flow.
Evaluate ideas like a dating app — swipe right to upvote, left to discard — for repeated, mood-independent judgment.
Organize ideas in lists, apply filters and track status, then mark winners as 'to implement' when it's time to decide.
Come back regularly, add new thoughts and let ideas grow and develop over time rather than stall after capture.
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
An agentic AI workspace built as a canvas for deep work
An agentic AI workspace built as a canvas for deep work
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.
ADHD-friendly AI assistant for notes, email and tasks
ADHD-friendly AI assistant for notes, email and tasks
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.
Generate startup ideas, solutions, and research reports in seconds
Generate startup ideas, solutions, and research reports in seconds
SpecialistAI-led customer interviews and research insights at scale
SpecialistAI-led customer interviews and research insights at scale
Free AI idea validation that scores your startup concept in under 60 seconds
Free AI idea validation that scores your startup concept in under 60 seconds
