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 |
|---|---|---|---|
| wbinsights.com | #12,023 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| redfast.com | #12,045 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 8 more | Find emails |
| cocolog-nifty.com | #12,057 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| escholarship.org | #12,171 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| rent.com | #12,177 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 9 more | Find emails |
| scite.ai | #12,388 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 13 more | Find emails |
| kununu.com | #12,402 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| ibisworld.com | #12,483 | AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more | Find emails |
| flixbus.com | #12,516 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 3 more | Find emails |
| binance.vision | #12,700 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| jmir.org | #12,870 | Amazon (ACM), Amazon Route 53, Font Awesome + 7 more | Find emails |
| elle.fr | #12,905 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| manyvids.com | #12,921 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| devpost.com | #12,959 | AWS Lambda, Cloudflare edge/CDN, Font Awesome + 18 more | Find emails |
| viagogo.com | #13,041 | Affirm, Amazon (ACM), Amazon CloudFront + 10 more | Find emails |
| crowdin.com | #13,390 | Amazon (ACM), Amazon Route 53, Astro + 5 more | Find emails |
| adzuna.com | #13,418 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| planningcenteronline.com | #13,481 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| domestika.org | #13,590 | AWS WAF, Amazon (ACM), Amazon CloudFront + 8 more | Find emails |
| transfermarkt.com | #13,607 | AWS WAF, Amazon CloudFront, Let's Encrypt + 1 more | Find emails |
| debenhams.com | #13,625 | AB Tasty, Amazon (ACM), Amazon CloudFront + 3 more | Find emails |
| publishersweekly.com | #13,699 | Amazon (ACM), Amazon Route 53, Google Analytics + 13 more | Find emails |
| nwsource.com | #13,706 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| csun.edu | #14,017 | AWS WAF, AddToAny, Amazon Route 53 + 17 more | Find emails |
| emag.bg | #14,177 | Amazon (ACM), Amazon CloudFront, NS1 | 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 →