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 |
|---|---|---|---|
| betterhelp.com | #7,140 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| stubhub.com | #7,197 | Affirm, Amazon (ACM), Amazon CloudFront + 10 more | Find emails |
| national-lottery.co.uk | #7,209 | Amazon (ACM), Amazon CloudFront, Google Tag Manager + 6 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| compass.com | #7,261 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| espn.com.br | #7,313 | AWS WAF, Amazon CloudFront | Find emails |
| zepto.com | #7,343 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| c-span.org | #7,716 | 33Across, AWS WAF, Adingo + 43 more | Find emails |
| thumbtack.com | #7,717 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| kabutan.jp | #7,792 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| sakshi.com | #7,940 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| christies.com | #7,975 | Adobe Audience Manager, Adobe Experience Cloud (Launch), Adobe Target + 8 more | Find emails |
| deine-tierwelt.de | #7,979 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| pearltrees.com | #8,020 | Apache, Bootstrap, DigiCert + 10 more | Find emails |
| geogebra.org | #8,202 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| delhivery.com | #8,297 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| espn.com.ar | #8,335 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| mamastar.jp | #8,338 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| espn.com.mx | #8,404 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| allen.in | #8,535 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| courtlistener.com | #9,181 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| espn.com.co | #9,303 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| espn.ph | #9,376 | AWS WAF, Amazon CloudFront, Sectigo | Find emails |
| amazon.jobs | #9,528 | Adobe Experience Cloud (Launch), Amazon (ACM), Amazon CloudFront + 7 more | Find emails |
| educacao.sp.gov.br | #9,594 | AWS WAF, Amazon Web Services, Microsoft 365 | Find emails |
| espn.com.do | #9,669 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 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 →