CAPTCHA & Bot Protection
91,344 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9.1%). 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 | snapchat.com | #123 (Tranco) | Find emails |
| 2 | apache.org | #125 (Tranco) | Find emails |
| 3 | one.one | #160 (Tranco) | Find emails |
| 4 | w3.org |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| ottplayer.tv | #77,488 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 9 more | Find emails |
| michill.jp | #77,490 | Adingo, AppsFlyer, Cloudflare + 12 more | Find emails |
| somosrex.com | #77,498 | Adobe Experience Manager Edge Delivery (Helix RUM), Amazon Route 53, Convert + 8 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| vliegwinkel.nl | #77,510 | Akamai Edge DNS, Cloudflare Web Analytics, DigiCert + 6 more | Find emails |
| wildshare.net | #77,525 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 8 more | Find emails |
| hearst.com | #77,532 | Apache, Bootstrap, Fastly + 9 more | Find emails |
| seafoodsource.com | #77,536 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 10 more | Find emails |
| tradier.com | #77,540 | Amazon CloudFront, Amazon Route 53, Atlassian Cloud + 20 more | Find emails |
| zakupka.com | #77,560 | Google Fonts, Google Hosted Libraries, Nginx + 2 more | Find emails |
| contactform7.com | #77,570 | BuySellAds, Cloudflare, Cloudflare Bot Management + 11 more | Find emails |
| biba.in | #77,573 | Amazon Route 53, Cloudflare edge/CDN, Font Awesome + 12 more | Find emails |
| cookpolitical.com | #77,583 | Bluesky, Chartbeat, Cloudflare Web Analytics + 10 more | Find emails |
| zelesta.de | #77,584 | Cloudflare edge/CDN, Google Ads Conversion, Google Analytics + 12 more | Find emails |
| thespiritsbusiness.com | #77,611 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| kauffman.org | #77,629 | Amazon Route 53, Google Fonts, Google Tag Manager + 7 more | Find emails |
| democrata.com.br | #77,631 | Amazon CloudFront, Amazon Route 53, Google Analytics + 10 more | Find emails |
| tdmu.edu.vn | #77,635 | ASP.NET, Google Analytics, Google Fonts + 5 more | Find emails |
| obekti.bg | #77,672 | Drupal, Font Awesome, Gemius + 11 more | Find emails |
| vlasta.cz | #77,728 | Cloudflare, Cloudflare edge/CDN, Didomi + 9 more | Find emails |
| macvendors.com | #77,736 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 9 more | Find emails |
| fanlyfun.com | #77,752 | Cloudflare, Cloudflare edge/CDN, Fingerprint Pro + 7 more | Find emails |
| onebroadband.in | #77,755 | Apache, Django, Font Awesome + 12 more | Find emails |
| dxn2u.com | #77,758 | Blogger, Font Awesome, PHP + 4 more | Find emails |
| shoofra.co.il | #77,759 | Amazon Route 53, Braze, Font Awesome + 13 more | Find emails |
| generacionxbox.com | #77,762 | Click.io CMP, Cloudflare, Disqus + 11 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 1,000,000-domain Tranco top-1M census (run top1m-2026-08-25-full-v2), snapshot August 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →