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 |
|---|---|---|---|
| nsdl.org | #865,817 | AWS WAF, Amazon (ACM), Bluesky + 7 more | Find emails |
| firevegas.com | #868,718 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 11 more | Find emails |
| just-connectors.com | #868,853 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| doorsuperstore.co.uk |
| #869,236 |
| AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more |
| Find emails |
| paulwurth.com | #869,626 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| erwin.com | #870,082 | AWS WAF, Amazon CloudFront, Azure DNS + 1 more | Find emails |
| 336049.com | #871,462 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| miamidice.com | #873,010 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 13 more | Find emails |
| sporoku.jp | #873,038 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| asap-ittechnology.com | #873,347 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| karmarts.co.th | #873,397 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| greyhound.com.mx | #873,749 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| wilsumerberge.nl | #873,781 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| buildingsmart.de | #873,854 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| perrygolf.com | #874,094 | AWS WAF, AddToAny, All in One SEO + 21 more | Find emails |
| emeralds.com | #874,905 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| evenbreak.co.uk | #875,654 | AWS WAF, Adobe Fonts (Typekit), Amazon (ACM) + 13 more | Find emails |
| treehouse-rental.com | #876,130 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| emergentaviation.com | #876,555 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| publications.qld.gov.au | #877,730 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| watchfinder.sk | #877,830 | AWS WAF, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| logisticsmiddleeast.com | #878,257 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| sfdbi.org | #878,480 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| marsbet.com | #879,090 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 5 more | Find emails |
| classiccarsforsale.co.uk | #879,756 | AWS WAF, Amazon Web Services, GoDaddy | 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 →