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 |
|---|---|---|---|
| pikpok.com | #63,856 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 11 more | Find emails |
| bestsimilar.com | #63,866 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| toronto.com | #63,873 | Amazon Route 53, DoubleClick (Google Ads), Google Publisher Tag + 6 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| stockwatch.com | #63,886 | ASP.NET, Amazon Advertising, Azure DNS + 14 more | Find emails |
| allscrabblewords.com | #63,889 | Amazon (ACM), Amazon CloudFront, Bootstrap + 6 more | Find emails |
| azmen.com | #63,899 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| robloxden.com | #63,917 | Cloudflare, Font Awesome, Google Analytics + 5 more | Find emails |
| kidsafe.com | #63,918 | AOS, Amazon (ACM), Apache + 7 more | Find emails |
| da.gov.ph | #63,925 | Apache, Google Analytics, Google Tag Manager + 6 more | Find emails |
| brou.com.uy | #63,990 | Apache, Bootstrap, Google Ads Conversion + 6 more | Find emails |
| directupload.eu | #64,003 | Apache, Let's Encrypt, PHP + 3 more | Find emails |
| quotes.net | #64,039 | Amazon (ACM), Amazon Route 53, Apache + 7 more | Find emails |
| labourseauxlivres.fr | #64,049 | Adobe Audience Manager, Casale Media, Cloudflare edge/CDN + 13 more | Find emails |
| berkat.ru | #64,052 | DDoS-Guard, Google AdSense, Telegram + 5 more | Find emails |
| maplemedia.io | #64,058 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| alamo.edu | #64,067 | ASP.NET, Adobe Fonts (Typekit), Azure API Management + 10 more | Find emails |
| cbs58.com | #64,100 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 15 more | Find emails |
| calliope.style | #64,118 | Akamai Edge DNS, Bootstrap, Cloudflare edge/CDN + 8 more | Find emails |
| dataintelo.com | #64,126 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 10 more | Find emails |
| ixi.ru | #64,154 | Let's Encrypt, Modernizr, Nginx + 3 more | Find emails |
| sfda.gov.sa | #64,162 | DigiCert, Drupal, Google Analytics + 4 more | Find emails |
| majorcineplex.com | #64,210 | AnyMind Group, Azure Front Door, Bootstrap + 15 more | Find emails |
| kloomba.com | #64,227 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 7 more | Find emails |
| geoportal.gov.pl | #64,230 | WordPress, jQuery | Find emails |
| brainking.com | #64,265 | Google Analytics, Let's Encrypt, Meta Pixel + 3 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 →