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 |
|---|---|---|---|
| expressandstar.com | #28,871 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Cloud DNS + 5 more | Find emails |
| thesouthafrican.com | #28,909 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 5 more | Find emails |
| themezhut.com | #28,917 | Font Awesome, Google Analytics, PHP + 6 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| malegislature.gov | #28,990 | ASP.NET, Akamai Edge DNS, DigiCert + 6 more | Find emails |
| istudiosg.com | #29,003 | Cloudflare edge/CDN, Fancybox, Font Awesome + 7 more | Find emails |
| serv00.net | #29,062 | Cloudflare Web Analytics, Cloudflare edge/CDN, Google Trust Services + 3 more | Find emails |
| fortex.ru | #29,109 | Google AdSense, Google Fonts, Let's Encrypt + 3 more | Find emails |
| maccosmetics.com | #29,110 | Cloudflare edge/CDN, Let's Encrypt, Riskified + 4 more | Find emails |
| itita.com | #29,119 | Adobe Fonts (Typekit), Cloudflare edge/CDN, CookieYes + 9 more | Find emails |
| dna.fr | #29,127 | ConsentMo, Google Tag Manager, reCAPTCHA v2 | Find emails |
| coldwellbankerhomes.com | #29,142 | Amazon Route 53, Amplitude, Axios + 14 more | Find emails |
| bambuser.io | #29,224 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| benetton.com | #29,246 | Cloudflare edge/CDN, Cookiebot, Google Tag Manager + 6 more | Find emails |
| pensoft.net | #29,310 | AOS, Cloudflare, Cloudflare edge/CDN + 6 more | Find emails |
| tryhackx.org | #29,313 | Let's Encrypt, jsDelivr, reCAPTCHA v2 | Find emails |
| agddns.net | #29,330 | ASP.NET, Google Analytics, Google Fonts + 5 more | Find emails |
| adultempire.com | #29,335 | Font Awesome, Let's Encrypt, Ruby on Rails + 1 more | Find emails |
| realself.com | #29,366 | Amazon Route 53, Fastly, Google Analytics + 3 more | Find emails |
| toysrus.com | #29,453 | Amazon Route 53, Bazaarvoice, Cloudflare edge/CDN + 9 more | Find emails |
| synchronoss.com | #29,515 | DigiCert, Fastly, Google Fonts + 10 more | Find emails |
| partner-viessmann.it | #29,532 | Cloudflare Turnstile, Google Analytics, Google Maps + 4 more | Find emails |
| gavi.org | #29,535 | ConsentMo, Drupal, Google Fonts + 1 more | Find emails |
| zmags.com | #29,580 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| jacobinmag.com | #29,631 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 4 more | Find emails |
| maxim.com | #29,740 | Cloudflare, Cloudflare edge/CDN, Google Publisher Tag + 2 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 →