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 |
|---|---|---|---|
| ramblers.org.uk | #112,292 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| jmir.pub | #112,346 | Amazon (ACM), Amazon Route 53, Font Awesome + 7 more | Find emails |
| givepulse.com | #112,613 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| holvi.com |
| #112,615 |
| Amazon CloudFront, Amazon Route 53, Amazon S3 + 21 more |
| Find emails |
| skfb.ly | #112,890 | AWS WAF, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| archonia.com | #113,320 | AWS WAF, Amazon (ACM), Amazon Route 53 + 6 more | Find emails |
| bna.bh | #113,366 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| pickletrip.com | #113,618 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| its-mo.com | #113,869 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| labx.com | #114,120 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| transfermarkt.pt | #114,218 | AWS WAF, Amazon CloudFront, Let's Encrypt + 1 more | Find emails |
| dealeraccelerate.net | #114,550 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| imdb.me | #115,279 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| yamibuy.com | #115,401 | AWS WAF, Amazon CloudFront, Cloudflare | Find emails |
| 2dehands.com | #115,421 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| cle-international.com | #115,442 | AWS WAF, Amazon CloudFront, DigiCert | Find emails |
| yumping.com | #115,644 | AWS WAF, Amazon (ACM), Amazon Web Services + 1 more | Find emails |
| adzuna.nl | #115,863 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| gentlemonster.com | #116,285 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| gladwell.com | #116,553 | AWS WAF, Amazon Web Services, Let's Encrypt | Find emails |
| atvtrader.com | #116,554 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| berghahnjournals.com | #116,755 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| wohnungsboerse.net | #116,805 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 | Find emails |
| humdata.org | #116,963 | AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more | Find emails |
| floathomes.com | #117,014 | AWS WAF, Amazon (ACM), Amazon CloudFront + 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 →