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.
| # | 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 |
|---|---|---|---|
| apizeal.com | #390,874 | AWS WAF, Amazon (ACM), Amazon CloudFront + 12 more | Find emails |
| kempstoncontrols.ie | #391,360 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| diariodelistmo.com | #391,650 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| rkmotors.com | #392,143 | AWS WAF, Amazon (ACM), Amazon Web Services + 2 more | Find emails |
| secretchicago.com | #393,105 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| alpine-rental.com | #393,853 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| roofgiant.com | #394,099 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| unisportstore.nl | #394,200 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| bexley.com | #394,497 | AWS WAF, Amazon CloudFront | Find emails |
| beleggersbelangen.nl | #394,849 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| kacecloud.com | #395,468 | AWS WAF, Amazon CloudFront, Azure DNS + 1 more | Find emails |
| pbisapps.org | #395,956 | AWS Lambda, AWS WAF, Bluesky + 12 more | Find emails |
| reeperbahnfestival.com | #396,173 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| internetforaviation.com | #396,290 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| morningstar.ca | #396,328 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| euromaster-neumaticos.es | #396,629 | AWS WAF, Amazon CloudFront, CSC (Digital Brand Services) + 1 more | Find emails |
| thebloodconnection.org | #396,694 | AWS WAF, Amazon (ACM), Amazon Web Services + 1 more | Find emails |
| militaryspareshub.com | #398,138 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| terravistarealty.com | #398,305 | ASP.NET, Amazon (ACM), Amazon CloudFront + 5 more | Find emails |
| nissen.fi | #398,907 | AWS WAF, Amazon (ACM), Amazon Web Services + 1 more | Find emails |
| gaaclassiccars.com | #398,912 | AWS WAF, Amazon (ACM), Amazon Web Services + 2 more | Find emails |
| ladymakeup.pl | #398,975 | AWS WAF, Amazon (ACM), Amazon Route 53 + 10 more | Find emails |
| athletico.com.br | #399,561 | AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more | Find emails |
| investordaily.com.au | #400,879 | AWS WAF, Amazon (ACM), Amazon CloudFront + 12 more | Find emails |
| hoteltreats.com | #401,420 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 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 →