Prolific records 18,697,671 monthly visits with -1.8% month-over-month growth and Paid pricing. Toolcraft records 6,469 monthly visits with -29.9% growth and Free pricing.
High-quality human data for AI training, evaluation, and research
Open-source starter kit for building custom design apps with AI
| Dimension / Metric | | |
|---|---|---|
| Official Domain | prolific.com | toolcraft.sh |
| Pricing Model | Paid | Free |
| Monthly Visits | 18.7M (18,697,671) | 6.47K (6,469) |
| MoM Traffic Delta | -352.04K (-1.8%) | -2.76K (-29.9%) |
| Primary Market & Share | 🇺🇸 United States (48.8%) | 🇮🇳 India (62.3%) |
| Direct Visits / mo | 12.98M | 3.28K |
| User Rating | 4.6 | 4.5 |
| 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.
Open-source starter kit for building custom design apps with AI
Start a new project with a single npx command and get an opinionated architecture that an AI agent can extend without losing structure.
Working canvas, toolbar, layer system, timeline and keyframe workflows are already wired up, so generated apps feel like real design tools rather than demos.
Sliders, colour palettes, gradient and curve editors, font pickers and more are included, covering the controls most creative tools need.
Embedded AI skills, performance instructions and visual testing rules help agents produce higher-quality, more consistent results and catch regressions.
Describe your idea in chat and Lovable turns it into a working app or website
Describe your idea in chat and Lovable turns it into a working app or website
Build working apps, websites, and AI agents by describing them
Build working apps, websites, and AI agents by describing them
Describe an app in chat and ship it
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.
Build websites and apps by chatting with AI in your browser
Build websites and apps by chatting with AI in your browser
No-code builder for custom AI agents and workflows
No-code builder for custom AI agents and workflows
Free / Open-sourceBuild, deploy, and govern production-ready agentic AI workflows
Free / Open-sourceBuild, deploy, and govern production-ready agentic AI workflows
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.
