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 |
|---|---|---|---|
| 360cities.net | #27,398 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 15 more | Find emails |
| kaiostech.com | #27,405 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 14 more | Find emails |
| tureng.com | #27,427 | ASP.NET, Cloudflare, Cloudflare edge/CDN + 6 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| xcritical.com | #27,436 | Amazon (ACM), Amazon CloudFront, Cloudflare + 6 more | Find emails |
| hostdime.com | #27,439 | Apache, Bootstrap, Google Analytics + 8 more | Find emails |
| bytemark.co.uk | #27,534 | Bootstrap, Chatbase, DigiCert + 12 more | Find emails |
| imprdom.com | #27,540 | GoDaddy Website Builder, GoDaddy | Find emails |
| keen.io | #27,561 | AOS, Amazon (ACM), Amazon CloudFront + 20 more | Find emails |
| u.ae | #27,596 | ASP.NET, Bootstrap, DigiCert + 11 more | Find emails |
| boden.com | #27,614 | Adobe Advertising Cloud, Adobe Analytics, Adobe Audience Manager + 11 more | Find emails |
| sitelutions.com | #27,617 | Cloudflare edge/CDN, Font Awesome, Google Analytics + 3 more | Find emails |
| breezy.hr | #27,620 | AWS Lambda, AWS WAF, Amazon (ACM) + 18 more | Find emails |
| one-line.com | #27,635 | Adobe Fonts (Typekit), Cloudflare, Cloudflare Bot Management + 16 more | Find emails |
| freedownloadmanager.org | #27,651 | Amazon Route 53, Buy Me a Coffee, Font Awesome + 10 more | Find emails |
| ly.com | #27,656 | ASP.NET, Akamai edge/CDN, Akamai mPulse + 5 more | Find emails |
| prismray.io | #27,667 | Cloudflare, Cloudflare edge/CDN, Cookiebot + 4 more | Find emails |
| vwthemes.com | #27,672 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 13 more | Find emails |
| mdwrite.net | #27,688 | Blogger, Cloudflare, Cloudflare Web Analytics + 10 more | Find emails |
| hubstack.net | #27,747 | Cloudflare Web Analytics, Cloudflare edge/CDN, Express + 6 more | Find emails |
| lacrossetechnology.com | #27,755 | Adobe Fonts (Typekit), Amazon Route 53, Axios + 16 more | Find emails |
| powtoon.com | #27,772 | Adobe Fonts (Typekit), Amazon Route 53, CHEQ + 25 more | Find emails |
| shrinetheme.com | #27,775 | Cloudflare, Cloudflare edge/CDN, GoAffPro + 6 more | Find emails |
| uakron.edu | #27,791 | Adobe Fonts (Typekit), Azure DNS, Bootstrap + 13 more | Find emails |
| westword.com | #27,796 | Bluesky, Cloudflare, Let's Encrypt + 7 more | Find emails |
| renderosity.com | #27,801 | Amazon (ACM), Apache, Bootstrap + 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-2026-08-25-full-v2), snapshot August 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →