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 |
|---|---|---|---|
| livedns.co.il | #29,412 | ASP.NET, Bootstrap, Font Awesome + 10 more | Find emails |
| huntshowdown.com | #29,427 | Axios, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| apollohospitals.com | #29,431 | Cloudflare, DigiCert, Drupal + 15 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| shahid.net | #29,437 | Adyen, Amazon CloudFront, Amazon Route 53 + 11 more | Find emails |
| paysafe.com | #29,438 | Akamai Edge DNS, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| fongo.com | #29,439 | All in One SEO, Cloudflare, Cloudflare Web Analytics + 10 more | Find emails |
| toysrus.com | #29,453 | Amazon Route 53, Bazaarvoice, Cloudflare edge/CDN + 9 more | Find emails |
| blabbermouth.net | #29,460 | Amazon API Gateway, Amazon Advertising, Blockthrough + 13 more | Find emails |
| wxyz.com | #29,501 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 13 more | Find emails |
| ascio.com | #29,509 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Tag Manager + 10 more | Find emails |
| synchronoss.com | #29,515 | DigiCert, Fastly, Google Fonts + 10 more | Find emails |
| partner-viessmann.it | #29,532 | Cloudflare Turnstile, Google Analytics, Google Maps + 4 more | Find emails |
| trend.az | #29,533 | Cloudflare, Cloudflare edge/CDN, CookieYes + 11 more | Find emails |
| gavi.org | #29,535 | ConsentMo, Drupal, Google Fonts + 1 more | Find emails |
| leanpub.com | #29,540 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| hightail.com | #29,550 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 23 more | Find emails |
| zmags.com | #29,580 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 11 more | Find emails |
| jacobinmag.com | #29,631 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| ccohs.ca | #29,637 | Amazon (ACM), Amazon Route 53, Apache + 5 more | Find emails |
| yousendit.com | #29,643 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| maxim.com | #29,740 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 6 more | Find emails |
| forever21.com | #29,741 | Amazon Route 53, Attentive, Cloudflare edge/CDN + 12 more | Find emails |
| ftmo.com | #29,745 | Bootstrap, Cloudflare, Cloudflare Bot Management + 9 more | Find emails |
| vov.vn | #29,747 | AnyMind Group, DigiCert, Drupal + 12 more | Find emails |
| lawsociety.org.uk | #29,753 | Azure API Management, Azure DNS, Azure Front Door + 15 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 →