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 |
|---|---|---|---|
| portaldatransparencia.gov.br | #42,207 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| eventbrite.nl | #42,225 | AWS WAF, Amazon (ACM), Amazon CloudFront + 19 more | Find emails |
| r-agent.com | #42,236 | Adyen, Amazon (ACM), Amazon CloudFront + 16 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| wlv.ac.uk | #42,349 | AWS WAF, Adobe Fonts (Typekit), Amazon CloudFront + 8 more | Find emails |
| cornwalllive.com | #42,457 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| brillonline.com | #42,572 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| examinerlive.co.uk | #42,646 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| getgems.io | #42,792 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| animationmagazine.net | #42,826 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| autodata-group.com | #42,863 | AddToAny, Adobe Fonts (Typekit), Amazon Route 53 + 18 more | Find emails |
| adzuna.de | #43,050 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| lootlabs.gg | #43,247 | AWS Lambda, Amazon CloudFront, Amazon S3 + 14 more | Find emails |
| hl7.org | #43,284 | AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more | Find emails |
| viewbug.com | #43,500 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| laprensagrafica.com | #43,619 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| parkrun.org.uk | #43,661 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| mobicontrol.cloud | #43,759 | AWS WAF, Amazon (ACM), Amazon Web Services + 1 more | Find emails |
| vietinbank.vn | #43,808 | AWS WAF, Amazon CloudFront, Amazon Route 53 | Find emails |
| aeroleads.com | #43,870 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| gazettelive.co.uk | #43,985 | AWS WAF, Amazon (ACM), Amazon CloudFront + 16 more | Find emails |
| lc.cx | #44,221 | AWS WAF, Amazon (ACM), Cloudflare + 6 more | Find emails |
| kmp.im | #44,222 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| architonic.com | #44,293 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| a-star.edu.sg | #44,298 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| itra.run | #44,303 | 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 →