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 |
|---|---|---|---|
| cruz.com | #235,329 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| stackedmilitaryparts.com | #236,042 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| cedarfair.com | #236,297 | AB Tasty, Amazon Route 53, Google Tag Manager + 7 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| leisurejobs.com | #236,349 | AWS WAF, Adobe Fonts (Typekit), Amazon (ACM) + 5 more | Find emails |
| allicdata.com | #236,427 | AWS WAF, Amazon CloudFront, DigiCert | Find emails |
| acquirensn.com | #238,528 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| purchasefasteners.com | #238,707 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| checklistfacil.com | #238,803 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| asaprotableparts.com | #238,963 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| just-in-timeparts.com | #239,029 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| nationalstocknumberpurchasing.com | #239,123 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| purchasingefficiency.com | #239,248 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| dashfasteners.com | #239,464 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| sse.com | #239,823 | Amazon CloudFront, Azure DNS, Bluesky + 8 more | Find emails |
| stackedhardware.com | #239,943 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| caravancampingsales.com.au | #240,001 | Adobe Experience Cloud (Launch), Amazon (ACM), Amazon CloudFront + 11 more | Find emails |
| automaticaerospace.com | #240,493 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| wliw.org | #240,949 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| asap-sourcingsolutions.com | #241,065 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| rfqaxis.com | #241,120 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| medbullets.com | #241,167 | ASP.NET, AWS WAF, Amazon (ACM) + 6 more | Find emails |
| nejmcareercenter.org | #241,283 | AWS WAF, Adobe Experience Cloud (Launch), Adobe Fonts (Typekit) + 12 more | Find emails |
| calamari.io | #241,408 | AWS Lambda, Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| mitsubishihccapital.co.uk | #242,604 | ASP.NET, Amazon CloudFront, Azure API Management + 12 more | Find emails |
| wearefasteners.com | #242,845 | 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 →