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 |
|---|---|---|---|
| playinboss.com | #1,768 | AWS WAF, Cloudflare, Cloudflare Web Analytics + 2 more | Find emails |
| funinstar.com | #1,771 | AWS WAF, Cloudflare, Cloudflare Bot Management + 2 more | Find emails |
| cloud.com | #1,892 | Amazon CloudFront, Amazon Route 53, DigiCert + 5 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| playinjeet.com | #1,920 | AWS WAF, Bootstrap, Cloudflare + 10 more | Find emails |
| themoviedb.org | #2,107 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 13 more | Find emails |
| coinmarketcap.com | #2,169 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 5 more | Find emails |
| nyu.edu | #2,283 | AWS WAF, Amazon CloudFront | Find emails |
| gallup.com | #2,323 | ASP.NET, Amazon (ACM), Amazon CloudFront + 7 more | Find emails |
| klarna.com | #2,345 | AWS WAF, Akamai Edge DNS, Amazon (ACM) + 1 more | Find emails |
| semanticscholar.org | #2,354 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| clickup.com | #2,484 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 34 more | Find emails |
| sketchfab.com | #2,557 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| howstuffworks.com | #2,624 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| prezi.com | #2,640 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 12 more | Find emails |
| mapquest.com | #2,694 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| tmdb.org | #2,779 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| traveloka.com | #3,208 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| eventbrite.co.uk | #3,293 | AWS WAF, Amazon (ACM), Amazon CloudFront + 19 more | Find emails |
| digitaltrends.com | #3,320 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| qnap.com | #3,453 | AWS WAF, Amazon (ACM), Amazon CloudFront + 10 more | Find emails |
| amazon.ae | #3,482 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| cvent.com | #3,511 | 6sense, Adobe Experience Cloud (Launch), Amazon (ACM) + 22 more | Find emails |
| morningstar.com | #3,689 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| immobilienscout24.de | #3,782 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| sbb.ch | #3,785 | 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 →