CAPTCHA & Bot Protection
90,376 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9%). 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 |
|---|---|---|---|
| allbirds.com | #41,248 | Attentive, Cloudflare edge/CDN, Google Tag Manager + 6 more | Find emails |
| royallib.com | #41,255 | Let's Encrypt, LiveInternet (Yadro), Nginx + 4 more | Find emails |
| vivacom.bg | #41,258 | Cookiebot, DigiCert, Google Fonts + 7 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| mail-tester.com |
| #41,273 |
| Bootstrap, Cloudflare, Cloudflare edge/CDN + 12 more |
| Find emails |
| trackifyy.com | #41,291 | AOS, Bootstrap, Express + 7 more | Find emails |
| flgov.com | #41,324 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 8 more | Find emails |
| acvauctions.com | #41,332 | AWS Lambda, Adobe Fonts (Typekit), Amazon CloudFront + 18 more | Find emails |
| bagelcode.com | #41,335 | AOS, Amazon (ACM), Amazon CloudFront + 16 more | Find emails |
| cruisemapper.com | #41,356 | Apache, Font Awesome, Google Analytics + 5 more | Find emails |
| ereplacementparts.com | #41,368 | ASP.NET, Azure API Management, Bootstrap + 13 more | Find emails |
| dlive.tv | #41,378 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
| fxempire.com | #41,386 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| truckstop.com | #41,388 | Adobe Fonts (Typekit), Amazon Route 53, Bootstrap + 17 more | Find emails |
| virtono.com | #41,396 | Apache, Bootstrap, Cookiebot + 8 more | Find emails |
| 10best.com | #41,456 | Fastly, Let's Encrypt, NS1 + 4 more | Find emails |
| seancody.com | #41,460 | Amazon Route 53, DigiCert, Google Fonts + 3 more | Find emails |
| modanisa.com | #41,469 | Amplience, Cloudflare, Cloudflare Bot Management + 16 more | Find emails |
| eurobank.gr | #41,520 | ASP.NET, Akamai Edge DNS, Azure API Management + 7 more | Find emails |
| omnibees.com | #41,529 | Cloudflare, Cloudflare edge/CDN, Elementor + 11 more | Find emails |
| xlovecam.com | #41,537 | Cloudflare, Cloudflare edge/CDN, Fancybox + 5 more | Find emails |
| activerain.com | #41,546 | AddToAny, Amazon Route 53, DoubleClick (Google Ads) + 12 more | Find emails |
| vintagestory.at | #41,628 | Font Awesome, Google Analytics, Google Tag Manager + 5 more | Find emails |
| zameen.com | #41,636 | Algolia, Amazon Route 53, Cloudflare edge/CDN + 7 more | Find emails |
| fifacm.com | #41,637 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 12 more | Find emails |
| asa.org.uk | #41,642 | Bootstrap, Cloudflare, Cloudflare Turnstile + 11 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →