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 |
|---|---|---|---|
| paragonpurchasing.com | #222,622 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| rentbyowner.co.za | #222,810 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| acrevalue.com | #222,892 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| 21casino.com | #222,898 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 5 more | Find emails |
| aerospace-store.com | #223,045 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| broadlineaero.com | #223,430 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| rentbyowner.co.uk | #223,467 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| mycci.net | #223,542 | AWS WAF, Amazon Web Services, Sectigo | Find emails |
| fulfillment3sixty.com | #223,810 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| onlinereservations.ai | #223,884 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| 123recht.de | #224,219 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| atlantiscondoresort.com | #224,643 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| crowngreenlogin.com | #224,725 | Amazon CloudFront, Cloudflare, Cloudflare Bot Management + 11 more | Find emails |
| salonkee.de | #225,157 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| industrialpartnumbers.com | #225,510 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| europarcs.de | #226,011 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| concursocgr2024-2026.com.co | #226,230 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 3 more | Find emails |
| vitalpurchasing.com | #226,550 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| artbrokerage.com | #226,801 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| vanderhaags.com | #226,802 | AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more | Find emails |
| spacebase.com | #227,783 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| nsnarc.com | #227,817 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| realpha.com | #227,841 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| boatsales.com.au | #227,896 | Adobe Experience Cloud (Launch), Amazon (ACM), Amazon CloudFront + 11 more | Find emails |
| integrated-enterprises.com | #228,128 | AWS WAF, Amazon (ACM), Amazon Web Services | 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 →