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 |
|---|---|---|---|
| f1academy.com | #576,593 | Amazon (ACM), Amazon CloudFront, Chartbeat + 8 more | Find emails |
| 88playgo.club | #577,284 | ASP.NET, Amazon (ACM), Amazon CloudFront + 4 more | Find emails |
| electronicsu.org | #577,866 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| plumbingsuperstore.co.uk | #578,114 | AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more | Find emails |
| fatherhood.gov | #578,141 | ASP.NET, AWS WAF, Apache + 14 more | Find emails |
| fundacaocasa.sp.gov.br | #578,422 | AWS WAF, Amazon Web Services, Microsoft 365 + 1 more | Find emails |
| kura-job.net | #579,160 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| xn----8hcborozt8bdd.xn--9dbq2a | #579,688 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| mnd.gov.sg | #579,794 | AWS WAF, Akamai Edge DNS, Amazon (ACM) + 1 more | Find emails |
| port-vale.co.uk | #582,028 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| dsfire.gov.uk | #582,250 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| lumicasino.com | #582,343 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| theclassicalstation.org | #582,736 | AWS WAF, Amazon Web Services, Let's Encrypt + 1 more | Find emails |
| wellcomeimages.org | #582,842 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| viagogo.lu | #582,851 | Affirm, Amazon (ACM), Amazon CloudFront + 10 more | Find emails |
| evancy.fr | #583,411 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| otsukaya.co.jp | #584,295 | AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more | Find emails |
| smartbuyglasses.jp | #584,460 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| thesingleadventist.com | #584,709 | AOS, ASP.NET, AWS WAF + 20 more | Find emails |
| smartbuyglasses.com.sg | #585,290 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| zoomtan.com | #585,329 | AWS WAF, Adobe Fonts (Typekit), Apache + 13 more | Find emails |
| prettylittlething.ca | #585,930 | AB Tasty, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| wss.com | #586,586 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 33 more | Find emails |
| bricodepot.com | #586,855 | AWS WAF, Amazon CloudFront, Microsoft 365 | Find emails |
| maryevans.com | #587,245 | AWS WAF, Cloudflare, Cloudflare Web Analytics + 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 →