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 |
|---|---|---|---|
| carrosp.com.br | #72,336 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 2 more | Find emails |
| anatomy.app | #72,339 | Cloudflare, Cloudflare edge/CDN, Express + 6 more | Find emails |
| toya.net.pl | #72,346 | ConsentMo, Fancybox, Font Awesome + 12 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| netzwerge.de | #72,367 | Apache, Let's Encrypt, PHP + 2 more | Find emails |
| cimer.gov.tr | #72,376 | DigiCert, Google Fonts, jQuery + 1 more | Find emails |
| terra-master.com | #72,393 | Alibaba Cloud DNS, Cloudflare edge/CDN, GoAffPro + 8 more | Find emails |
| door.ac | #72,395 | Amazon (ACM), Amazon Route 53, Google Hosted Libraries + 10 more | Find emails |
| wvnews.com | #72,401 | DoubleClick (Google Ads), Google Fonts, Google Publisher Tag + 6 more | Find emails |
| staffs.ac.uk | #72,405 | ASP.NET, Contensis, Google Fonts + 6 more | Find emails |
| amwater.com | #72,408 | AddThis, Amazon (ACM), Amazon Route 53 + 17 more | Find emails |
| obed.ru | #72,427 | Font Awesome, Google Hosted Libraries, Nginx + 6 more | Find emails |
| footba11.co | #72,441 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 3 more | Find emails |
| bucataras.ro | #72,446 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 7 more | Find emails |
| casel.org | #72,452 | Adobe Fonts (Typekit), Apache, Cloudflare + 15 more | Find emails |
| supertails.com | #72,456 | Cloudflare edge/CDN, Google Ads Conversion, Google Analytics + 12 more | Find emails |
| polinetmoi.com | #72,457 | Cloudflare, Cloudflare edge/CDN, Let's Encrypt + 3 more | Find emails |
| ysabelmora.com | #72,466 | Cloudflare edge/CDN, Cookiebot, DoubleClick (Google Ads) + 8 more | Find emails |
| worten.es | #72,474 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 2 more | Find emails |
| entamenext.com | #72,477 | Adingo, Amazon (ACM), Amazon Route 53 + 10 more | Find emails |
| veb.ru | #72,487 | Bitrix, PHP, Qrator + 4 more | Find emails |
| owlhost.net | #72,510 | Apache, Font Awesome, Google Analytics + 8 more | Find emails |
| ninewest.com | #72,515 | Cloudflare edge/CDN, CrazyEgg, Let's Encrypt + 7 more | Find emails |
| schwalbe.com | #72,517 | Font Awesome, Google Tag Manager, Let's Encrypt + 2 more | Find emails |
| nara.gov | #72,545 | AddToAny, Amazon CloudFront, Bootstrap + 7 more | Find emails |
| lifx.com | #72,547 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 11 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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →