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 |
|---|---|---|---|
| unisport.pl | #607,694 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| leukermeer.nl | #608,860 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| thmtk.com | #609,453 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| trippymates.com |
| #610,144 |
| AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more |
| Find emails |
| z-lib.org | #610,409 | AWS WAF, Amazon Web Services | Find emails |
| aerospacesphere.com | #610,567 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| kandaovr.com | #610,921 | Amazon CloudFront, Google Ads Conversion, Google Analytics + 7 more | Find emails |
| sportsinsights.com | #610,985 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 9 more | Find emails |
| viagogo.ie | #611,236 | Affirm, Amazon (ACM), Amazon CloudFront + 10 more | Find emails |
| feeling.be | #611,327 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| cili.lt | #612,178 | Amazon (ACM), Amazon CloudFront, AppsFlyer + 2 more | Find emails |
| ivysociete.com | #612,465 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| dubstore.uk | #612,635 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| mobilehealthconsumer.com | #612,725 | AWS WAF, Amazon CloudFront, Amazon Route 53 | Find emails |
| valleymetrofares.org | #612,799 | ASP.NET, AWS WAF, Adobe Fonts (Typekit) + 11 more | Find emails |
| levelninesports.com | #612,811 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| gillinghamfootballclub.com | #612,969 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| iron.io | #614,165 | Amazon CloudFront, Amazon Route 53, Atlassian Cloud + 24 more | Find emails |
| miresi.es | #614,892 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| dubstore.com | #615,651 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| vilgain.ro | #616,300 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| biotus.lt | #616,467 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| b-ok.org | #616,687 | AWS WAF, Amazon Web Services | Find emails |
| reggaetonbeachfestival.com | #617,099 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 13 more | Find emails |
| hgmforkliftparts.com | #617,318 | 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 →