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 |
|---|---|---|---|
| iban.com | #133,738 | Bootstrap, Fancybox, Font Awesome + 12 more | Find emails |
| sentinelcolorado.com | #133,739 | Broadstreet, Cloudflare, DoubleClick (Google Ads) + 14 more | Find emails |
| natureserve.org | #133,747 | Adobe Fonts (Typekit), Apache, Bootstrap + 15 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| mytabs.ru | #133,776 | Bunny Fonts, Cloudflare, DDoS-Guard + 9 more | Find emails |
| profuturo.education | #133,782 | AOS, All in One SEO, Cloudflare edge/CDN + 6 more | Find emails |
| kinarino.jp | #133,790 | Adobe Experience Cloud (Launch), Amazon Advertising, Amazon Route 53 + 11 more | Find emails |
| warmuseum.ca | #133,791 | AddToAny, Adobe Fonts (Typekit), Amazon (ACM) + 14 more | Find emails |
| gleif.org | #133,811 | Cookiebot, Google Fonts, Google Hosted Libraries + 7 more | Find emails |
| writeappreviews.com | #133,832 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 4 more | Find emails |
| torrentleech.cc | #133,835 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 2 more | Find emails |
| thelocal.com | #133,843 | Adnami, Bluesky, DoubleClick (Google Ads) + 9 more | Find emails |
| ark-funds.com | #133,874 | AOS, Azure API Management, Azure Front Door + 12 more | Find emails |
| vino.com | #133,877 | Apache, Bootstrap, Criteo + 8 more | Find emails |
| jacarandafm.com | #133,880 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 13 more | Find emails |
| ucn.cl | #133,896 | AOS, DigiCert, Font Awesome + 11 more | Find emails |
| dizayn-kottedzha.ru | #133,901 | Cloudflare, ConsentMo, Let's Encrypt + 9 more | Find emails |
| crtm.es | #133,902 | ASP.NET, Font Awesome, Microsoft IIS + 2 more | Find emails |
| 5gum.com | #133,919 | Amazon Route 53, Brightcove, Drupal + 8 more | Find emails |
| joxi.ru | #133,935 | Cloudflare, Let's Encrypt, Nginx + 4 more | Find emails |
| nxthost.com | #133,937 | Bootstrap, Cloudflare, Font Awesome + 10 more | Find emails |
| rhalf.com | #133,963 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| lookingforjob.co | #133,967 | Google AdSense, Google Analytics, Google Fonts + 12 more | Find emails |
| skala-r.ru | #133,975 | Bitrix, Let's Encrypt, Nginx + 3 more | Find emails |
| penmai.com | #133,981 | Cloudflare, Google AdSense, Google Analytics + 7 more | Find emails |
| narayana-verlag.de | #133,989 | CCM19, Let's Encrypt, Matomo + 4 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 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →