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 |
|---|---|---|---|
| asapaerospacehub.com | #312,277 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| cetesb.sp.gov.br | #312,442 | AWS WAF, Amazon Web Services, Sectigo | Find emails |
| hoteliermiddleeast.com | #312,936 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| taikwun.hk | #313,361 | AWS WAF, Amazon CloudFront, Microsoft 365 + 1 more | Find emails |
| mytransfers.com | #313,536 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| joblift.de | #313,621 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| igluski.com | #313,727 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| cppinvestments.com | #313,919 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| buyaviationspares.com | #314,053 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| buymilnsnparts.com | #314,140 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| hsbc.com.vn | #314,549 | Amazon CloudFront, Apache, DigiCert + 3 more | Find emails |
| oorlogsbronnen.nl | #314,792 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| serff.com | #315,303 | AWS WAF, Amazon (ACM), Amazon Web Services + 1 more | Find emails |
| fhc-usa.com | #315,575 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| calcarcover.com | #315,790 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| e3electricals.com | #316,051 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| trustpilotmail.com | #316,380 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 | Find emails |
| barcelonasecreta.com | #316,812 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| portaltransparencia.gov.br | #317,110 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| npox.nl | #317,322 | ASP.NET, Amazon (ACM), Amazon CloudFront + 3 more | Find emails |
| wearepartspurchasing.com | #317,737 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| crowngreenbonus.com | #317,881 | Amazon CloudFront, Cloudflare, Cloudflare Bot Management + 11 more | Find emails |
| klarna.de | #318,046 | AWS WAF, Akamai Edge DNS, Amazon (ACM) + 1 more | Find emails |
| aberdeenlive.news | #318,242 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| lteforum.at | #318,269 | 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 →