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 |
|---|---|---|---|
| zerobounce.net | #46,454 | Amazon CloudFront, Atlassian Cloud, Cloudflare Bot Management + 20 more | Find emails |
| guzel.net.tr | #46,490 | Bootstrap, Cloudflare Web Analytics, Cloudflare edge/CDN + 8 more | Find emails |
| becker.com | #46,503 | Amazon Route 53, Bootstrap, Cloudflare edge/CDN + 13 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| v1.ru | #46,505 | DDoS-Guard, Let's Encrypt | Find emails |
| geckoboard.com | #46,509 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 17 more | Find emails |
| getspace.us | #46,511 | Apache, Font Awesome, Google Fonts + 7 more | Find emails |
| eldia.com | #46,550 | Chartbeat, Cloudflare, Cloudflare edge/CDN + 12 more | Find emails |
| advego.com | #46,553 | Bootstrap, Font Awesome, Google Tag Manager + 8 more | Find emails |
| bizapedia.com | #46,563 | ASP.NET, Cloudflare, Cloudflare Turnstile + 2 more | Find emails |
| ovationthemes.com | #46,568 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 11 more | Find emails |
| gorgias.com | #46,590 | AWS Lambda, Cloudflare, Cloudflare edge/CDN + 11 more | Find emails |
| podryad.tv | #46,598 | Google Tag Manager, Nginx, PHP + 5 more | Find emails |
| yellowpagesdirectory.com | #46,606 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 13 more | Find emails |
| nation.co.ke | #46,613 | Amazon Route 53, Cloudflare edge/CDN, DoubleClick (Google Ads) + 11 more | Find emails |
| iisc.ac.in | #46,617 | Apache, Bootstrap, Fancybox + 7 more | Find emails |
| bipek.com | #46,636 | GoDaddy Website Builder, GoDaddy | Find emails |
| tartecosmetics.com | #46,642 | Amazon Route 53, Cloudflare edge/CDN, Let's Encrypt + 7 more | Find emails |
| ford.com.tr | #46,649 | ASP.NET, Google Analytics, Google Maps + 3 more | Find emails |
| hypersurf.com | #46,651 | Apache, Google Analytics, Meta Pixel + 4 more | Find emails |
| utrgv.edu | #46,659 | AddThis, Adobe Fonts (Typekit), Font Awesome + 12 more | Find emails |
| hdfclife.com | #46,664 | Adobe Experience Cloud (Launch), Akamai Edge DNS, Akamai edge/CDN + 10 more | Find emails |
| intakeq.com | #46,671 | AOS, ASP.NET, AWS Lambda + 18 more | Find emails |
| zipcar.com | #46,683 | AddToAny, Amazon Route 53, Cloudflare Bot Management + 13 more | Find emails |
| a1-systems.com | #46,686 | Fancybox, Google Analytics, Google Tag Manager + 8 more | Find emails |
| ucoz.org | #46,700 | Bootstrap, CleanTalk, Font Awesome + 8 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 →