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 |
|---|---|---|---|
| standsapp.org | #25,105 | Google Analytics, Google Fonts, Google Tag Manager + 7 more | Find emails |
| tlscontact.com | #25,110 | Font Awesome, Google Fonts, Google Tag Manager + 12 more | Find emails |
| eduson.tv | #25,114 | Amazon Route 53, Google Analytics, Let's Encrypt + 3 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| archive.fo | #25,126 | Let's Encrypt, Nginx, reCAPTCHA v2 | Find emails |
| archive.today | #25,129 | Let's Encrypt, Nginx, reCAPTCHA v2 | Find emails |
| gabungwa.net | #25,149 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 3 more | Find emails |
| omaha.com | #25,158 | Amazon Advertising, Font Awesome, Google AdSense + 16 more | Find emails |
| sanfe.in | #25,187 | Attentive, Cloudflare edge/CDN, Google Ads Conversion + 13 more | Find emails |
| wmata.com | #25,227 | Cloudflare, DigiCert, Fastly + 4 more | Find emails |
| vitacost.com | #25,229 | Attentive, Cloudflare, Cloudflare Bot Management + 7 more | Find emails |
| armorgames.com | #25,239 | Amazon CloudFront, Cloudflare edge/CDN, Let's Encrypt | Find emails |
| kameone.cl | #25,255 | Amazon (ACM), Amazon CloudFront, Bootstrap + 6 more | Find emails |
| perthnow.com.au | #25,273 | Adobe Experience Cloud (Launch), Amazon (ACM), Amazon CloudFront + 5 more | Find emails |
| topps.com | #25,321 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| gubagoo.io | #25,326 | Amazon Route 53, Let's Encrypt, PHP + 4 more | Find emails |
| siteplug.com | #25,388 | AOS, Amazon Route 53, Bootstrap + 13 more | Find emails |
| indriya.com | #25,408 | Adobe Experience Cloud (Launch), Fastly, Microsoft 365 + 4 more | Find emails |
| govexec.com | #25,419 | Azure DNS, Bootstrap, DigiCert + 8 more | Find emails |
| loopia.com | #25,443 | Bootstrap, DigiCert, Font Awesome + 4 more | Find emails |
| leaseweb.com | #25,463 | Font Awesome, Google Fonts, Google Tag Manager + 2 more | Find emails |
| binary.net | #25,522 | Bootstrap, Font Awesome, Google Ads Conversion + 8 more | Find emails |
| ccmixter.org | #25,533 | Google AdSense, Let's Encrypt, jQuery + 1 more | Find emails |
| raceroster.com | #25,601 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| cello.so | #25,737 | Amazon Route 53, CookieYes, Google Tag Manager + 4 more | Find emails |
| thg.com | #25,753 | Cloudflare edge/CDN, Fastly, Google Tag Manager + 4 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 →