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 |
|---|---|---|---|
| freestyler.ws | #52,960 | Google Analytics, Google Fonts, Nginx + 4 more | Find emails |
| unitedhosting.co.uk | #52,968 | Bootstrap, Chatbase, DigiCert + 10 more | Find emails |
| daemon-tools.cc | #52,979 | Amazon (ACM), Amazon Route 53, Google Analytics + 5 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| qa.com | #52,990 | BrightEdge, Google Fonts, Google Maps + 7 more | Find emails |
| nacional.hr | #53,001 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 9 more | Find emails |
| gtlaw.com | #53,002 | Amazon Route 53, Cloudflare edge/CDN, DigiCert + 8 more | Find emails |
| secretescapes.com | #53,009 | Bootstrap, Cloudflare, DigiCert + 9 more | Find emails |
| montreal.ca | #53,015 | Cloudflare, Cloudflare edge/CDN, Cloudinary + 5 more | Find emails |
| domeny.tv | #53,031 | AngularJS, DigiCert, Google Analytics + 4 more | Find emails |
| oncehub.com | #53,033 | Azure DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 15 more | Find emails |
| 63.ru | #53,059 | DDoS-Guard, Let's Encrypt | Find emails |
| orthofeet.com | #53,112 | Cloudflare, Cloudflare edge/CDN, Intelligems + 6 more | Find emails |
| degreed.com | #53,139 | ASP.NET, Azure DNS, Azure Front Door + 17 more | Find emails |
| alyaum.com | #53,150 | Amazon CloudFront, Bootstrap, Cloudflare + 14 more | Find emails |
| 3dexport.com | #53,153 | Bootstrap, Cloudflare Turnstile, DigiCert + 13 more | Find emails |
| streetmap.co.uk | #53,158 | ASP.NET, Google Analytics, Google Tag Manager + 6 more | Find emails |
| justica.gov.pt | #53,178 | ASP.NET, Amazon Route 53, AngularJS + 12 more | Find emails |
| cipherkey.com | #53,210 | Bootstrap, Google Analytics, Google Fonts + 6 more | Find emails |
| legalinsurrection.com | #53,220 | All in One SEO, Cloudflare, Cloudflare Web Analytics + 17 more | Find emails |
| 24rosa.nl | #53,232 | Google Tag Manager, Let's Encrypt, LiteSpeed + 7 more | Find emails |
| uniformadvantage.com | #53,246 | Adobe Experience Cloud (Launch), Blue Triangle, Cloudflare + 9 more | Find emails |
| serpapi.com | #53,254 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 6 more | Find emails |
| seegreen.net | #53,272 | Apache, Fancybox, Font Awesome + 13 more | Find emails |
| verisure.com | #53,275 | Amazon CloudFront, Bootstrap, Cloudflare edge/CDN + 14 more | Find emails |
| westga.edu | #53,289 | Azure Front Door, Bootstrap, Cludo + 16 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 →