CAPTCHA & Bot Protection
56,649 of the 965,200 top sites in our Tranco top-1M census run reCAPTCHA (5.9%). 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 | one.one | #160 (Tranco) | Find emails |
| 2 | pki.goog | #218 (Tranco) | Find emails |
| 3 | t-online.de | #220 (Tranco) | Find emails |
| 4 | dnsmadeeasy.com |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| uwm.edu | #13,650 | Axios, Font Awesome, Google Tag Manager + 8 more | Find emails |
| publishersweekly.com | #13,699 | Amazon (ACM), Amazon Route 53, Google Analytics + 5 more | Find emails |
| minne.com | #13,754 | Amazon CloudFront, Amazon Route 53, Google Analytics + 5 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| some-tools.com | #13,826 | GoDaddy Website Builder, GoDaddy | Find emails |
| shadowserver.org | #13,848 | Google Analytics, Google Fonts, Google Tag Manager + 3 more | Find emails |
| kunasystems.com | #13,849 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
| the-independent.com | #13,949 | Cloudflare, Fastly, Let's Encrypt + 3 more | Find emails |
| cbsi.com | #13,966 | AOS, Akamai Bot Manager, Bootstrap + 7 more | Find emails |
| tass.com | #13,970 | AngularJS, Google Fonts, Nginx + 3 more | Find emails |
| amcrestcloud.com | #13,996 | Amazon Route 53, Google Analytics, Google Tag Manager + 2 more | Find emails |
| film.ru | #14,003 | Drupal, Fancybox, Google Fonts + 3 more | Find emails |
| chomikuj.pl | #14,103 | ASP.NET, Cloudflare, Cloudflare edge/CDN + 1 more | Find emails |
| advertising.com | #14,125 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 6 more | Find emails |
| domenus.ru | #14,152 | Nginx, PHP | Find emails |
| sonnen.de | #14,170 | Cloudflare edge/CDN, Google Tag Manager, Google Trust Services + 5 more | Find emails |
| cottonon.com | #14,202 | Bazaarvoice, Cloudflare edge/CDN, Google Tag Manager + 9 more | Find emails |
| uxcam.com | #14,222 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| cambridgeenglish.org | #14,239 | ASP.NET, Cloudflare, DigiCert + 10 more | Find emails |
| toronto.ca | #14,263 | Amazon CloudFront, Font Awesome, Google Maps + 3 more | Find emails |
| stockbit.com | #14,270 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
| slb.com | #14,286 | DigiCert, Google Fonts, Google Tag Manager + 6 more | Find emails |
| longisland.com | #14,320 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 9 more | Find emails |
| cloudways.com | #14,369 | Bootstrap, Cloudflare Bot Management, Cloudflare edge/CDN + 5 more | Find emails |
| parspack.net | #14,375 | Google Analytics, Google Tag Manager, WordPress + 1 more | Find emails |
| monica.im | #14,401 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 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 965,200-domain Tranco top-1M census (run top1m-2026-08-20-full), snapshot August 21, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →