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 |
|---|---|---|---|
| svgator.com | #110,584 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 3 more | Find emails |
| proximus.com | #110,585 | Adobe Experience Cloud (Launch), Amazon CloudFront, Dynatrace + 9 more | Find emails |
| emblibrary.com | #110,599 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 8 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| mintos.com | #110,621 | Astro, Cloudflare, Cloudflare Bot Management + 14 more | Find emails |
| romerobill.com | #110,624 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 5 more | Find emails |
| liveauctionworld.com | #110,644 | ASP.NET, Amazon (ACM), Amazon CloudFront + 7 more | Find emails |
| mm-com.de | #110,647 | Apache, Bootstrap, DigiCert + 8 more | Find emails |
| supersaas.com | #110,662 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| adam.com | #110,673 | Bootstrap, DigiCert, Font Awesome + 6 more | Find emails |
| promega.com | #110,677 | ASP.NET, Azure API Management, Azure DNS + 8 more | Find emails |
| lineascan.build | #110,736 | ASP.NET, Bootstrap, Cloudflare + 10 more | Find emails |
| offtrackbetting.com | #110,738 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| eumed.net | #110,739 | Bootstrap, Chart.js, Font Awesome + 9 more | Find emails |
| learnwithhomer.com | #110,747 | Amazon Route 53, Fastly, Font Awesome + 10 more | Find emails |
| citelsoftware.com.br | #110,780 | AWS Lambda, Cloudflare edge/CDN, Google Fonts + 5 more | Find emails |
| logsis.ru | #110,784 | AOS, Bootstrap, Let's Encrypt + 13 more | Find emails |
| actoragecheck.com | #110,792 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 7 more | Find emails |
| mirrored.to | #110,807 | Apache, Google Analytics, Google Hosted Libraries + 5 more | Find emails |
| icandiapps.com | #110,808 | Amazon Route 53, Backbone.js, CookieYes + 9 more | Find emails |
| monetag.com | #110,815 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 9 more | Find emails |
| drbronner.com | #110,817 | Attentive, Bazaarvoice, Cloudflare + 16 more | Find emails |
| randstad.nl | #110,819 | Amazon (ACM), Amazon Route 53, reCAPTCHA Enterprise | Find emails |
| doverpublications.com | #110,826 | Cloudflare edge/CDN, Google Ads Conversion, Google Analytics + 9 more | Find emails |
| match.it | #110,850 | ASP.NET, Bootstrap, Civic Cookie Control + 6 more | Find emails |
| vyadd.com | #110,866 | Apache, Bootstrap, Font Awesome + 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 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →