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 |
|---|---|---|---|
| amazon.com | #25 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| imdb.com | #237 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| appsflyer.com | #302 | Amazon CloudFront, Amazon Route 53, Cloudflare Bot Management + 12 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| amazon.co.uk |
| #313 |
| AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more |
| Find emails |
| checkpoint.com | #338 | 6sense, AWS WAF, AddToAny + 18 more | Find emails |
| trustpilot.com | #346 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 | Find emails |
| espn.com | #425 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| eventbrite.com | #450 | AWS WAF, Amazon (ACM), Amazon CloudFront + 19 more | Find emails |
| ieee.org | #588 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| amazon.ca | #640 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| amazon.es | #711 | AWS WAF, Amazon CloudFront, DigiCert | Find emails |
| wattpad.com | #772 | AdZerk (Kevel), Amazon (ACM), Amazon CloudFront + 10 more | Find emails |
| amazon.com.mx | #974 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| binance.com | #978 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| redfin.com | #1,037 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| dribbble.com | #1,070 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| kicker.de | #1,172 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| emag.ro | #1,206 | Amazon (ACM), Amazon CloudFront, NS1 | Find emails |
| marktplaats.nl | #1,225 | Adform, Amazon (ACM), Amazon CloudFront + 8 more | Find emails |
| wisc.edu | #1,273 | Amazon (ACM), Amazon CloudFront, Amazon S3 + 10 more | Find emails |
| wayground.com | #1,294 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| sportybet.com | #1,384 | Amazon (ACM), Amazon CloudFront, Cloudflare + 3 more | Find emails |
| huggingface.co | #1,503 | AWS WAF, Amazon (ACM), Amazon CloudFront + 4 more | Find emails |
| alphapolis.co.jp | #1,638 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| espn.com.ve | #1,690 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 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 →