
Large consumer panel for market research surveys, but lacks Prolific's specialized focus on academic studies and AI tuning.
CapMonster Cloud records 862,340 monthly visits with +36.3% month-over-month growth and Paid pricing. Prolific records 18,697,671 monthly visits with -1.8% growth and Paid pricing.

AI-powered CAPTCHA solving API built for scale
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | capmonster.cloud | prolific.com |
| Pricing Model | Paid | Paid |
| Monthly Visits | 862.34K (862,340) | 18.7M (18,697,671) |
| MoM Traffic Delta |
| +229.65K (+36.3%) |
| -352.04K (-1.8%) |
| Primary Market & Share | 🇧🇷 Brazil (16.7%) | 🇺🇸 United States (48.8%) |
|---|
| Direct Visits / mo | 32.7K | 12.98M |
|---|
| User Rating | 4.2 | 4.6 |
|---|
| Supported Platforms | Website | Website |
|---|

AI-powered CAPTCHA solving API built for scale
Supports reCAPTCHA v2/v3 and Enterprise, Cloudflare Turnstile and Bot Challenge, AWS WAF, GeeTest, Tencent CAPTCHA, Yidun, Text CAPTCHA and more.
Integrate with official libraries for C#, Python, JavaScript, Go, and PHP, or use the API of other services via compatibility.
Chrome and Firefox extensions detect and solve CAPTCHAs automatically in the background while you browse.
Most challenge types can be solved without supplying your own proxies, simplifying setup.
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.

Large consumer panel for market research surveys, but lacks Prolific's specialized focus on academic studies and AI tuning.

SpecialistEnterprise-grade web data infrastructure offering robust proxy networks and automated CAPTCHA solving capabilities.

SpecialistThe environments frontier AI trains on, and the agents that do the recurring work
#3
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

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.


SpecialistManaged headless browser platform providing cloud automation APIs, though without built-in automated CAPTCHA solving.

Free / Open-sourceOpen-source data labeling and evaluation platform for AI workflows, but requires bringing your own annotation workforce.


SpecialistProvides web scraping endpoints with built-in proxy rotation and CAPTCHA bypass capabilities.
A direct AI-powered CAPTCHA solving service offering competitive pricing, fast response times, and similar browser extensions.

SpecialistAI-led customer interviews and research insights at scale
Large consumer panel for market research surveys, but lacks Prolific's specialized focus on academic studies and AI tuning.

SpecialistEnterprise-grade web data infrastructure offering robust proxy networks and automated CAPTCHA solving capabilities.
SpecialistThe environments frontier AI trains on, and the agents that do the recurring work
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.
SpecialistSources verified B2B professionals and healthcare experts for specialized research, but lacks broad general-population academic panels.
SpecialistManaged headless browser platform providing cloud automation APIs, though without built-in automated CAPTCHA solving.
Free / Open-sourceOpen-source data labeling and evaluation platform for AI workflows, but requires bringing your own annotation workforce.
SpecialistProvides web scraping endpoints with built-in proxy rotation and CAPTCHA bypass capabilities.
A direct AI-powered CAPTCHA solving service offering competitive pricing, fast response times, and similar browser extensions.
SpecialistAI-led customer interviews and research insights at scale