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 |
|---|---|---|---|
| farmasave.it | #49,495 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| creativemornings.com | #49,820 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| trendlyne.com | #50,167 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| hsbc.com.sg |
| #50,173 |
| Amazon CloudFront, Apache, DigiCert + 2 more |
| Find emails |
| transfermarkt.pl | #50,260 | AWS WAF, Amazon CloudFront, Let's Encrypt + 1 more | Find emails |
| rws.com | #50,467 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| transfermarkt.com.ar | #50,797 | AWS WAF, Amazon CloudFront, Let's Encrypt + 1 more | Find emails |
| gridoto.com | #50,801 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| go2senkyo.com | #50,837 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| uwf.edu | #51,355 | ASP.NET, Adobe Fonts (Typekit), Amazon CloudFront + 22 more | Find emails |
| buscalibre.cl | #51,357 | Amazon (ACM), Amazon Route 53, Google Identity Services + 3 more | Find emails |
| stihl.com | #51,362 | AWS WAF, Amazon CloudFront, Microsoft 365 | Find emails |
| dofus.com | #51,425 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| alcampo.es | #51,453 | Amazon (ACM), Amazon CloudFront, Contentful + 4 more | Find emails |
| espn.com.sg | #51,889 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| practicebetter.io | #51,919 | AWS Lambda, Amplitude, Cloudflare + 17 more | Find emails |
| vatera.hu | #52,740 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| marktplaats.com | #53,132 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| hcommons.org | #53,368 | AWS WAF, Amazon (ACM), Amazon CloudFront + 10 more | Find emails |
| adzuna.fr | #53,404 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| ewu.edu | #53,445 | AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more | Find emails |
| firstbus.co.uk | #53,672 | Amazon (ACM), Amazon CloudFront, Apache + 18 more | Find emails |
| stedelijk.nl | #53,992 | AWS WAF, Amazon CloudFront, Microsoft 365 + 1 more | Find emails |
| wyylde.com | #54,013 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| byoinnavi.jp | #54,039 | 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 →