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 |
|---|---|---|---|
| kuula.co | #14,415 | Amazon (ACM), Amazon Route 53 | Find emails |
| sdamgia.ru | #14,432 | Cloudflare, DDoS-Guard, Google Analytics + 3 more | Find emails |
| urlscan.io | #14,480 | Amazon Route 53, Bootstrap, Google Fonts + 2 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| #14,481 |
| Adobe Fonts (Typekit), Akamai Edge DNS, Datadog + 9 more |
| Find emails |
| nixplay.com | #14,492 | AdRoll, Amazon Route 53, Cloudflare edge/CDN + 8 more | Find emails |
| duetapp.net | #14,497 | AppsFlyer, Google Cloud DNS, Google Identity Services + 5 more | Find emails |
| cartier.com | #14,499 | AB Tasty, Akamai Bot Manager, Akamai Edge DNS + 9 more | Find emails |
| wm.com | #14,558 | Amazon CloudFront, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| prusa3d.com | #14,610 | Cloudflare, Cloudflare edge/CDN, CookieYes + 8 more | Find emails |
| loft.com | #14,617 | Adobe Experience Cloud (Launch), Bread Financial (Comenity), CSC (Digital Brand Services) + 9 more | Find emails |
| urban.org | #14,640 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 11 more | Find emails |
| rockpapershotgun.com | #14,657 | Amazon Advertising, Fastly, Google Analytics + 4 more | Find emails |
| easemytrip.com | #14,771 | ASP.NET, AngularJS, Google Cloud DNS + 4 more | Find emails |
| healthdirect.gov.au | #14,906 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| ezlo.com | #14,932 | Cloudflare edge/CDN, Font Awesome, GSAP + 8 more | Find emails |
| aph.gov.au | #14,933 | ASP.NET, DigiCert, Foundation + 12 more | Find emails |
| rigla.ru | #15,003 | Google Analytics | Find emails |
| hottopic.com | #15,031 | Bloomreach, Cloudflare edge/CDN, DigiCert + 4 more | Find emails |
| tibia.com | #15,075 | Amazon Route 53, Cloudflare edge/CDN, Let's Encrypt + 2 more | Find emails |
| donanimhaber.com | #15,081 | Cloudflare, Google Analytics, Google Publisher Tag + 6 more | Find emails |
| townnews.com | #15,098 | Cloudflare, Google Publisher Tag, Google Tag Manager + 4 more | Find emails |
| ministrybrands.com | #15,142 | Amazon (ACM), Amazon Route 53, Cloudflare edge/CDN + 7 more | Find emails |
| blogfreely.net | #15,148 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 2 more | Find emails |
| shelly.cloud | #15,171 | Cloudflare edge/CDN, Global-e, Google Cloud DNS + 9 more | Find emails |
| centene.com | #15,180 | Adobe Experience Cloud (Launch), Amazon (ACM), Amazon CloudFront + 9 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 →