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 |
|---|---|---|---|
| portalinmobiliario.com | #18,714 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 5 more | Find emails |
| dice.fm | #18,723 | Branch, Braze, Cloudflare + 11 more | Find emails |
| mcko.ru | #18,725 | Font Awesome, Nginx, PHP | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| createsend.com |
| #18,739 |
| DigiCert, Google Tag Manager, Segment + 2 more |
| Find emails |
| nanoleaf.me | #18,809 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 6 more | Find emails |
| jci.org | #18,842 | Amazon Route 53, Google Publisher Tag, Let's Encrypt + 4 more | Find emails |
| limelight.pk | #18,916 | Amazon Route 53, Cloudflare edge/CDN, Google Ads Conversion + 8 more | Find emails |
| olympustaff.com | #18,973 | Blogger, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| dream-singles.com | #18,991 | Amazon (ACM), Amazon Route 53, Bootstrap + 9 more | Find emails |
| levi.in | #19,064 | Cloudflare edge/CDN, Let's Encrypt, Shopify + 3 more | Find emails |
| reedsy.com | #19,104 | Google Fonts, Google Trust Services, Nginx + 2 more | Find emails |
| libas.in | #19,106 | Cloudflare, Cloudflare edge/CDN, Google Ads Conversion + 9 more | Find emails |
| chatib.us | #19,182 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 10 more | Find emails |
| deodap.in | #19,188 | Cloudflare edge/CDN, Google Fonts, Google Tag Manager + 9 more | Find emails |
| poco.de | #19,235 | Bazaarvoice, Cloudflare, Cloudflare Bot Management + 3 more | Find emails |
| sizzling-hot-deluxe-slot.com | #19,248 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 7 more | Find emails |
| snapon.com | #19,276 | ASP.NET, Fancybox, Google Fonts + 7 more | Find emails |
| avm.de | #19,279 | Cloudflare edge/CDN, Klaviyo, Let's Encrypt + 6 more | Find emails |
| lottostar.co.za | #19,304 | Cloudflare, Google Fonts, Google Tag Manager + 9 more | Find emails |
| nubia.com | #19,384 | Cloudflare edge/CDN, Google Tag Manager, Let's Encrypt + 8 more | Find emails |
| tikkie.me | #19,569 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| niezalezna.pl | #19,577 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 7 more | Find emails |
| football.ua | #19,603 | ASP.NET, Cloudflare, Cloudflare edge/CDN + 5 more | Find emails |
| simplesite.com | #19,645 | Let's Encrypt, Next.js, React | Find emails |
| nlcbplaywhelotto.com | #19,658 | Google AdSense, Google Analytics, Google Fonts + 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 →