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 |
|---|---|---|---|
| pet-home.jp | #44,756 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| oercommons.org | #44,775 | AWS WAF, Amazon (ACM), Amazon Route 53 + 13 more | Find emails |
| flyteam.jp | #45,136 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| companycheck.co.uk |
| #45,146 |
| AWS WAF, Amazon (ACM), Amazon CloudFront + 5 more |
| Find emails |
| transfermarkt.co.in | #45,258 | AWS WAF, Amazon CloudFront, Let's Encrypt + 1 more | Find emails |
| wellcome.ac.uk | #45,434 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| sagradafamilia.org | #45,903 | AWS WAF, Amazon Route 53, Amazon Web Services + 7 more | Find emails |
| sykescottages.co.uk | #46,024 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| ba-sh.com | #46,045 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| omroep.nl | #46,264 | ASP.NET, Amazon (ACM), Amazon CloudFront + 4 more | Find emails |
| b-parts.com | #46,304 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| dnnsoftware.com | #46,310 | AWS WAF, Amazon (ACM), Amazon Web Services + 1 more | Find emails |
| mindtickle.com | #46,384 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| thejns.org | #46,518 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| pricerunner.dk | #46,592 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| levif.be | #47,117 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| codementor.io | #47,390 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| clicksign.com | #47,686 | AWS Lambda, AWS WAF, Amazon CloudFront + 23 more | Find emails |
| pixpa.com | #47,782 | AWS WAF, Amazon (ACM), Amazon CloudFront + 10 more | Find emails |
| transfermarkt.co | #48,016 | AWS WAF, Amazon CloudFront, Let's Encrypt + 1 more | Find emails |
| typeset.io | #48,179 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| vibescm.com | #48,371 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| lot-tissimo.com | #48,538 | ASP.NET, Amazon (ACM), Amazon CloudFront + 13 more | Find emails |
| regain.us | #48,741 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| debate.com.mx | #49,094 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 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 →