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 |
|---|---|---|---|
| tcl.com | #10,734 | Bazaarvoice, Cloudflare edge/CDN, Google Tag Manager + 4 more | Find emails |
| hnb.lk | #10,749 | DigiCert, Google Analytics, Google Tag Manager + 2 more | Find emails |
| forth.gr | #10,752 | Font Awesome, Google Analytics, Google Fonts + 3 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| getbeamer.com |
| #10,777 |
| Cloudflare, Cloudflare edge/CDN, Google Fonts + 4 more |
| Find emails |
| harpercollins.com | #10,795 | Adobe Fonts (Typekit), Attentive, Auth0 + 13 more | Find emails |
| kangtotoberjaya.biz | #10,797 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| palmonas.com | #10,798 | Amazon Route 53, Cloudflare edge/CDN, Convert + 12 more | Find emails |
| moonactive.net | #10,809 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| gofund.me | #10,814 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| kmv.ru | #10,893 | ConsentMo, Font Awesome, PHP + 2 more | Find emails |
| dexcom.com | #10,912 | Amplience, Cloudflare edge/CDN, Google Cloud DNS + 9 more | Find emails |
| airwallex.com | #10,940 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 4 more | Find emails |
| e1.ru | #11,063 | DDoS-Guard, Let's Encrypt | Find emails |
| likee.com | #11,067 | Amazon Route 53, Kong, Nginx + 1 more | Find emails |
| auswaertiges-amt.de | #11,081 | Meta Pixel, YouTube, jsDelivr | Find emails |
| paramount.com | #11,098 | AOS, Bootstrap, DigiCert + 6 more | Find emails |
| kqed.org | #11,104 | Amazon Route 53, Cloudflare edge/CDN, Google Tag Manager + 6 more | Find emails |
| weglot.com | #11,142 | Amazon Route 53, Cloudflare edge/CDN, Convert + 6 more | Find emails |
| proboards.com | #11,143 | Envoy, Fastly, Google Cloud DNS + 4 more | Find emails |
| flagcounter.com | #11,198 | Let's Encrypt, jQuery, reCAPTCHA v2 | Find emails |
| nextersglobal.com | #11,243 | Amazon (ACM), Amazon Route 53, Google Workspace + 2 more | Find emails |
| optimumdesk.com | #11,259 | AOS, Cloudflare Bot Management, Cloudflare edge/CDN + 5 more | Find emails |
| americanprogress.org | #11,279 | Adobe Fonts (Typekit), Amazon Route 53, Cloudflare edge/CDN + 8 more | Find emails |
| mobilevikings.be | #11,297 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| snap.com | #11,310 | Amazon Route 53, Arkose Labs, Contentful + 14 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 →