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 |
|---|---|---|---|
| arabianbusiness.com | #26,043 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| new88ok1.com | #26,047 | ASP.NET, Amazon (ACM), Amazon CloudFront + 8 more | Find emails |
| jacobs.com | #26,128 | AWS WAF, Akamai edge/CDN, Akamai mPulse + 8 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| sothebysrealty.com | #26,270 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| myunidays.com | #26,359 | AdZerk (Kevel), Amazon (ACM), Amazon CloudFront + 9 more | Find emails |
| themirror.com | #26,626 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| ipl.org | #26,752 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| scalapay.com | #26,767 | AWS Lambda, AWS WAF, Amazon (ACM) + 14 more | Find emails |
| espn.in | #26,971 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| hollandandbarrett.com | #26,985 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| quest.com | #27,019 | AWS WAF, Amazon CloudFront, Azure DNS + 1 more | Find emails |
| transfermarkt.co.uk | #27,204 | AWS WAF, Amazon CloudFront, Let's Encrypt + 1 more | Find emails |
| medibang.com | #27,383 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| idcrawl.com | #27,416 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| edpuzzle.com | #27,518 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 3 more | Find emails |
| liqpay.ua | #27,588 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| breezy.hr | #27,620 | AWS Lambda, AWS WAF, Amazon (ACM) + 18 more | Find emails |
| ankama.com | #27,807 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| juul.com | #28,110 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| huduser.gov | #28,427 | AWS WAF, Amazon Route 53 | Find emails |
| vr.fi | #28,632 | Amazon (ACM), Amazon CloudFront, Contentful + 5 more | Find emails |
| senato.it | #28,775 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| fs.com | #28,789 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| transfermarkt.us | #28,979 | AWS WAF, Amazon CloudFront, Let's Encrypt + 1 more | Find emails |
| agi.it | #29,061 | AWS WAF, Amazon CloudFront, DigiCert + 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 →