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 |
|---|---|---|---|
| tempursealy.com | #424,038 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| asapbuying.com | #424,135 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| yolegroup.com | #424,478 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| melbourne.vic.gov.au |
| #424,561 |
| AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more |
| Find emails |
| scite.org | #424,838 | Amazon (ACM), Amazon CloudFront, Chili Piper + 6 more | Find emails |
| secretberlin.co | #425,108 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| providerwire.com | #425,134 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| eastsuffolk.gov.uk | #425,931 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| playbackonline.ca | #425,989 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| rxbenefits.com | #427,270 | AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more | Find emails |
| lucru.md | #427,362 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| basketball-history.com | #427,660 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| lifelearn-cliented.com | #428,216 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| nationalstocknumbersupply.com | #428,653 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| salonkee.lu | #428,799 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| justintimeaviationparts.com | #430,024 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| lensrentals.net | #430,147 | AWS WAF, Amazon (ACM), Amazon CloudFront + 3 more | Find emails |
| bloodcenter.org | #431,028 | AOS, ASP.NET, AWS WAF + 7 more | Find emails |
| promocodes.club | #431,125 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| club-sunstar.jp | #431,219 | AWS WAF, Amazon (ACM), Amazon CloudFront + 8 more | Find emails |
| daredictionary.com | #431,428 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| stayforlong.de | #432,102 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| northcountrysir.com | #432,211 | AWS WAF, Amazon Web Services, GoDaddy | Find emails |
| ekidenreki.com | #432,360 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| sfmayor.org | #432,369 | 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 →