CAPTCHA & Bot Protection
3,100 of the 1,000,000 top sites in our Tranco top-1M census run AWS WAF CAPTCHA (0.3%). Amazon's CAPTCHA challenge product, part of AWS WAF's bot-mitigation features. Detection is homepage-level HTML/header fingerprinting, so a site can run AWS WAF CAPTCHA on other pages without it showing here.
Other captcha & bot protection
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | amazon.com | #25 (Tranco) | Find emails |
| 2 | imdb.com | #237 (Tranco) | Find emails |
| 3 | appsflyer.com | #302 (Tranco) | Find emails |
| 4 | amazon.co.uk |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| nycgovparks.org | #29,129 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| hf.space | #29,137 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| eventbrite.es | #29,162 | AWS WAF, Amazon (ACM), Amazon CloudFront + 19 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| qoo-app.com | #29,170 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| prettylittlething.com | #29,280 | AB Tasty, Amazon (ACM), Amazon CloudFront + 3 more | Find emails |
| uni.lu | #29,389 | AWS WAF, Amazon CloudFront, Microsoft 365 | Find emails |
| skiddle.com | #29,432 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 13 more | Find emails |
| trustpilot.net | #29,506 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 | Find emails |
| grid.id | #29,567 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| wichita.edu | #29,754 | AddToAny, Amazon CloudFront, Apache + 20 more | Find emails |
| nihr.ac.uk | #30,148 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| espn.com.au | #30,216 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| scrum.org | #30,670 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| asapsemi.com | #30,676 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| amzn.com | #30,766 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| doxo.com | #30,991 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| cram.com | #31,140 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| sciencesetavenir.fr | #31,185 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| fstoppers.com | #31,530 | AWS WAF, Amazon (ACM), Amazon Advertising + 12 more | Find emails |
| evbuc.com | #31,873 | AWS WAF, Amazon (ACM), Amazon CloudFront + 8 more | Find emails |
| sf.gov | #31,972 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| marianne.net | #32,444 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| warhammer.com | #32,494 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| technologynetworks.com | #32,581 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| rvtrader.com | #32,750 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
From the Crawlora Website Tech Stack Dataset, a homepage-level fingerprint of a 1,000,000-domain Tranco top-1M census (run top1m-2026-08-25-full-v2), snapshot August 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →