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 |
|---|---|---|---|
| sacurrent.com | #48,994 | Cloudflare, Google Analytics, Google Tag Manager + 7 more | Find emails |
| kroton.com.br | #49,002 | AOS, Azure DNS, Google Analytics + 8 more | Find emails |
| ugu.pl | #49,006 | Google AdSense, Google Analytics, Google Tag Manager + 3 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| 1muslimapp.com |
| #49,019 |
| ASP.NET, Cloudflare, Cloudflare Web Analytics + 4 more |
| Find emails |
| uep24.ru | #49,049 | Bootstrap, Font Awesome, Google Fonts + 6 more | Find emails |
| classicfirearms.com | #49,105 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| moviemaker.com | #49,142 | Cloudflare, Cloudflare edge/CDN, Google Publisher Tag + 2 more | Find emails |
| zupyak.com | #49,177 | Cloudflare, Cloudflare edge/CDN, Google AdSense + 6 more | Find emails |
| qbt.com.au | #49,243 | Bootstrap, Cloudflare, Let's Encrypt + 5 more | Find emails |
| powerlineblog.com | #49,303 | Cloudflare, Cloudflare edge/CDN, Disqus + 10 more | Find emails |
| yuja.com | #49,345 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 11 more | Find emails |
| leaseweb.nl | #49,350 | Fastly, Font Awesome, Google Fonts + 3 more | Find emails |
| impericon.com | #49,371 | BrightEdge, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| arcamax.com | #49,377 | Amazon Advertising, Amazon Route 53, Google Publisher Tag + 7 more | Find emails |
| itaka.pl | #49,383 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 4 more | Find emails |
| incidecoder.com | #49,426 | Google Analytics, Google Tag Manager, Google Trust Services + 2 more | Find emails |
| ceo.ca | #49,435 | Amazon (ACM), Amazon Route 53, Google Fonts + 5 more | Find emails |
| agilealliance.org | #49,442 | Adobe Fonts (Typekit), Font Awesome, Google Analytics + 6 more | Find emails |
| multiversx.com | #49,498 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 6 more | Find emails |
| unt.edu.ar | #49,502 | Bootstrap, Font Awesome, Google Analytics + 9 more | Find emails |
| blog.bg | #49,503 | Google Analytics, Google Publisher Tag, Google Tag Manager + 5 more | Find emails |
| cinestar.de | #49,509 | DigiCert, Google Ads Conversion, Nginx + 1 more | Find emails |
| appcreator24.com | #49,551 | Font Awesome, Google Fonts, Google Identity Services + 5 more | Find emails |
| wizard101.com | #49,561 | Google Tag Manager, Let's Encrypt, OneTrust + 2 more | Find emails |
| uowm.gr | #49,570 | Bootstrap, Font Awesome, Google Analytics + 5 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 →