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 |
|---|---|---|---|
| serveriai.lt | #4,232 | Cookiebot, Fancybox, Google Ads Conversion + 7 more | Find emails |
| kinghost.com.br | #4,234 | Cloudflare edge/CDN, DigiCert, Google Fonts + 5 more | Find emails |
| mosyle.com | #4,243 | Google Analytics, Google Tag Manager, PHP + 3 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| backblazeb2.com | #4,273 | Cloudflare, Cloudflare edge/CDN, GSAP + 9 more | Find emails |
| easydns.com | #4,321 | Adobe Fonts (Typekit), DigiCert, Font Awesome + 6 more | Find emails |
| tinkercad.com | #4,346 | Amazon CloudFront, Amazon Route 53, Bootstrap + 4 more | Find emails |
| thesaurus.com | #4,367 | Amazon Advertising, Amazon Route 53, Cloudflare Bot Management + 7 more | Find emails |
| foreignpolicy.com | #4,406 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 5 more | Find emails |
| adweek.com | #4,459 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 9 more | Find emails |
| packagist.org | #4,493 | Google Workspace, Let's Encrypt | Find emails |
| everydayhealth.com | #4,516 | Amazon Advertising, Amazon Route 53, Google Fonts + 4 more | Find emails |
| turnitin.com | #4,577 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 5 more | Find emails |
| paysafecard.com | #4,578 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| collider.com | #4,598 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| polygon.com | #4,610 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| peatix.com | #4,630 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| xda-developers.com | #4,652 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| pp.ua | #4,758 | Google Analytics, Let's Encrypt, Nginx | Find emails |
| directadmin.com | #4,862 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| jbhifi.com.au | #4,873 | Amazon Route 53, Cloudflare edge/CDN, Contentful + 12 more | Find emails |
| anker-in.com | #4,918 | Let's Encrypt, Netlify, Next.js + 1 more | Find emails |
| overleaf.com | #4,965 | Cloudflare, Google Analytics, Google Tag Manager + 4 more | Find emails |
| streamable.com | #4,977 | Amazon Route 53, Fastly, Google Analytics + 8 more | Find emails |
| finanzen.net | #4,999 | Amazon Advertising, Azure DNS, Criteo + 9 more | Find emails |
| netnod.se | #5,001 | Drupal, Let's Encrypt, Mailchimp + 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 →