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.
| # | 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 |
|---|---|---|---|
| vacationcottage.com | #66,388 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| scixplorer.org | #66,873 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| espn.cl | #66,942 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| propertyroom.com | #66,954 | AB Tasty, ASP.NET, AWS WAF + 22 more | Find emails |
| deutschlandticket.de | #67,649 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| kctcs.edu | #67,696 | ASP.NET, Amazon CloudFront, Font Awesome + 11 more | Find emails |
| relayfi.com | #67,814 | AWS WAF, Amazon (ACM), Amazon CloudFront + 14 more | Find emails |
| regonline.com | #68,430 | 6sense, Adobe Experience Cloud (Launch), Amazon (ACM) + 15 more | Find emails |
| shipsltd.co.jp | #68,503 | Amazon CloudFront, Amazon Route 53, Google Analytics + 11 more | Find emails |
| streetsideclassics.com | #68,509 | AWS WAF, Amazon (ACM), Amazon Web Services + 2 more | Find emails |
| petrescue.com.au | #68,554 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| centraldispatch.com | #68,761 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 19 more | Find emails |
| o2online.es | #69,090 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| kyureki.com | #69,189 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| publicrecords.us | #69,383 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| readmoo.com | #69,579 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| sogi.com.tw | #69,985 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| idtechex.com | #70,136 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| espn.com.pe | #70,758 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| betsson.co | #71,043 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| boatinternational.com | #71,106 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| klarna.app | #71,363 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| acf.gov | #72,053 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| eventbrite.be | #72,316 | AWS WAF, Amazon (ACM), Amazon CloudFront + 19 more | Find emails |
| edinburghlive.co.uk | #72,719 | AWS WAF, Amazon (ACM), Amazon CloudFront + 14 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 →