CAPTCHA & Bot Protection
91,344 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9.1%). Google's CAPTCHA/bot-scoring widget, the most widely deployed CAPTCHA by far. Detection is homepage-level HTML/header fingerprinting, so a site can run reCAPTCHA on other pages without it showing here.
Other captcha & bot protection
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | snapchat.com | #123 (Tranco) | Find emails |
| 2 | apache.org | #125 (Tranco) | Find emails |
| 3 | one.one | #160 (Tranco) | Find emails |
| 4 | w3.org |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| podio.com | #15,644 | AdRoll, Amazon (ACM), Amazon CloudFront + 13 more | Find emails |
| udg.mx | #15,653 | Bootstrap, DigiCert, Drupal + 11 more | Find emails |
| pragmaticplay.com | #15,655 | Amazon (ACM), Amazon CloudFront, Cloudflare + 10 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| hcn.health |
| #15,661 |
| Amazon Route 53, Bootstrap, Cloudflare Bot Management + 16 more |
| Find emails |
| movieweb.com | #15,666 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| audioboom.com | #15,683 | Amazon CloudFront, Atlassian Cloud, Atlassian Statuspage + 11 more | Find emails |
| luxerone.com | #15,689 | Amazon Route 53, DoubleClick (Google Ads), Font Awesome + 21 more | Find emails |
| adsinteractive.com | #15,700 | Cloudflare, Gravatar, InMobi + 5 more | Find emails |
| inhabitat.com | #15,709 | All in One SEO, Amazon Advertising, Cloudflare + 17 more | Find emails |
| ozbargain.com.au | #15,724 | Cloudflare, Cloudflare edge/CDN, Google Identity Services + 8 more | Find emails |
| exist.ru | #15,767 | ASP.NET, Fancybox, Nginx + 5 more | Find emails |
| rijksmuseum.nl | #15,771 | ASP.NET, Azure API Management, Azure Front Door + 7 more | Find emails |
| claro.com.co | #15,773 | DigiCert, Google Analytics, Google Fonts + 3 more | Find emails |
| dailysabah.com | #15,783 | AOS, Amazon CloudFront, Amazon Route 53 + 15 more | Find emails |
| cracked.com | #15,795 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 5 more | Find emails |
| vendhq.com | #15,827 | Amazon Route 53, Bizible, Bootstrap + 15 more | Find emails |
| rivian.com | #15,834 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 9 more | Find emails |
| darpa.mil | #15,835 | Amazon CloudFront, Amazon S3, ConsentMo + 8 more | Find emails |
| spareroom.co.uk | #15,842 | Apache, Bootstrap, Express + 18 more | Find emails |
| rmbl.ws | #15,843 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| pagerduty.com | #15,855 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 20 more | Find emails |
| azuredatabricks.net | #15,875 | Azure DNS, DigiCert, OneTrust + 1 more | Find emails |
| oaic.gov.au | #15,883 | Chart.js, Cloudflare Bot Management, Cloudflare edge/CDN + 8 more | Find emails |
| chop.edu | #15,885 | Amazon CloudFront, Drupal, Fastly + 11 more | Find emails |
| fastercapital.com | #15,893 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 6 more | Find emails |
Showing the first 10,000matches — add a filter to narrow.
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 →