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 |
|---|---|---|---|
| registry.co | #70,418 | ASP.NET, Amazon Route 53, Cloudflare edge/CDN + 6 more | Find emails |
| vsthemes.org | #70,426 | Cloudflare Turnstile, Let's Encrypt, Nginx + 4 more | Find emails |
| vivian.com | #70,443 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 5 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| fromdoppler.com | #70,444 | Adobe Fonts (Typekit), Cloudflare, Cloudflare Web Analytics + 6 more | Find emails |
| sampi.net.br | #70,449 | Apache, Cloudflare, ConsentMo + 7 more | Find emails |
| bancaynegocios.com | #70,454 | Google Analytics, Google Tag Manager, Gravatar + 6 more | Find emails |
| mooncat.com | #70,464 | Attentive, Cloudflare edge/CDN, Google Fonts + 6 more | Find emails |
| metal-tracker.com | #70,473 | Google Analytics, Let's Encrypt, LiveInternet (Yadro) + 5 more | Find emails |
| s-host.com.ua | #70,474 | Apache, Bootstrap, Font Awesome + 11 more | Find emails |
| mfor.hu | #70,491 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 10 more | Find emails |
| sceducationlottery.com | #70,529 | ASP.NET, Bootstrap, Chart.js + 11 more | Find emails |
| asso-web.com | #70,533 | Bootstrap, Fancybox, Font Awesome + 15 more | Find emails |
| stockvault.net | #70,550 | BuySellAds, Cloudflare, Cloudflare edge/CDN + 14 more | Find emails |
| salisburypost.com | #70,568 | Akamai Bot Manager, Akamai edge/CDN, Google Tag Manager + 14 more | Find emails |
| frontdesksuite.com | #70,573 | AOS, Apache, Azure DNS + 13 more | Find emails |
| bdcom.com | #70,584 | Apache, Bootstrap, Font Awesome + 6 more | Find emails |
| concentra.com | #70,588 | ASP.NET, Bootstrap, Cloudflare + 11 more | Find emails |
| upl.uz | #70,592 | Google AdSense, Google Fonts, Let's Encrypt + 7 more | Find emails |
| allcinema.net | #70,593 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 14 more | Find emails |
| trustdice.win | #70,607 | Cloudflare, Cloudflare Turnstile, Cloudflare edge/CDN + 6 more | Find emails |
| fsolver.es | #70,633 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 7 more | Find emails |
| ayntec.com | #70,637 | Cloudflare edge/CDN, Let's Encrypt, PayPal + 4 more | Find emails |
| chausson.fr | #70,638 | ASP.NET, Azure API Management, Bootstrap + 12 more | Find emails |
| web-ster.com | #70,640 | Adobe Fonts (Typekit), Apache, Bootstrap + 10 more | Find emails |
| h2g2.com | #70,665 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 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 →