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 |
|---|---|---|---|
| 4ty.gr | #58,325 | Apache, Google Fonts, Let's Encrypt + 1 more | Find emails |
| hslda.org | #58,328 | ASP.NET, Adobe Fonts (Typekit), Bootstrap + 9 more | Find emails |
| thewitcher.com | #58,365 | Adobe Fonts (Typekit), Amazon Route 53, Google Tag Manager + 6 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| misfitsmarket.com |
| #58,381 |
| Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more |
| Find emails |
| etfdb.com | #58,386 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| crossbar.org | #58,433 | AWS Lambda, Adobe Fonts (Typekit), Amazon Route 53 + 15 more | Find emails |
| printnode.com | #58,436 | Google Analytics, Google Fonts, Google Tag Manager + 2 more | Find emails |
| biblicalarchaeology.org | #58,440 | Bootstrap, Cloudflare, Cloudflare Bot Management + 14 more | Find emails |
| redpanda.com | #58,441 | AWS Lambda, Bluesky, Cloudflare + 18 more | Find emails |
| salonultimate.com | #58,447 | AWS Lambda, Adobe Fonts (Typekit), Amazon Route 53 + 9 more | Find emails |
| ports.se | #58,459 | Apache, DigiCert, Font Awesome + 9 more | Find emails |
| kingcomix.com | #58,469 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 8 more | Find emails |
| scholarsportal.info | #58,489 | Amazon Route 53, Bluesky, Google Fonts + 6 more | Find emails |
| lanueva.com | #58,491 | Cloudflare, Cloudflare edge/CDN, Express + 7 more | Find emails |
| seibertron.com | #58,501 | Bootstrap, Font Awesome, Google AdSense + 9 more | Find emails |
| gunsbroker.ru | #58,508 | DDoS-Guard, Font Awesome, Google AdSense + 8 more | Find emails |
| klamm.de | #58,509 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 3 more | Find emails |
| miaromance.com | #58,522 | Cloudflare, Cloudflare edge/CDN, Fingerprint Pro + 7 more | Find emails |
| auto-scan.ru | #58,536 | Bootstrap, Fancybox, Google Fonts + 10 more | Find emails |
| layouthub.com | #58,543 | Cloudflare, Cloudflare edge/CDN, Crisp + 9 more | Find emails |
| fapeal.br | #58,548 | Adopt, Cloudflare Turnstile, ConsentMo + 12 more | Find emails |
| quore.com | #58,552 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 11 more | Find emails |
| socialbookmarkssite.com | #58,571 | Let's Encrypt, Namecheap, Nginx + 4 more | Find emails |
| najox.com | #58,581 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 10 more | Find emails |
| goteamup.com | #58,584 | AWS Lambda, Amazon (ACM), Amazon CloudFront + 13 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 →