CAPTCHA & Bot Protection
56,649 of the 965,200 top sites in our Tranco top-1M census run reCAPTCHA (5.9%). 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 | one.one | #160 (Tranco) | Find emails |
| 2 | pki.goog | #218 (Tranco) | Find emails |
| 3 | t-online.de | #220 (Tranco) | Find emails |
| 4 | dnsmadeeasy.com |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| bigoven.com | #47,682 | ASP.NET, Cloudinary, DigiCert + 7 more | Find emails |
| aemps.es | #47,736 | Font Awesome, Google Tag Manager, WordPress + 4 more | Find emails |
| ljmu.ac.uk | #47,742 | Font Awesome, Google Maps, Google Tag Manager + 4 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| intellinews.com |
| #47,761 |
| Amazon Route 53, Cloudflare edge/CDN, Google AdSense + 6 more |
| Find emails |
| double11.com | #47,768 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 5 more | Find emails |
| pixpa.com | #47,782 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| tuev-media.de | #47,810 | Let's Encrypt, Matomo | Find emails |
| dune-hd.com | #47,811 | Cloudflare edge/CDN, Google Ads Conversion, Google Analytics + 11 more | Find emails |
| smo.lt | #47,814 | Cloudflare edge/CDN, Let's Encrypt, Microsoft Clarity + 3 more | Find emails |
| bakersfield.com | #47,856 | Amazon Advertising, Font Awesome, Google AdSense + 9 more | Find emails |
| gardeners.com | #47,859 | Adobe Fonts (Typekit), Cloudflare edge/CDN, Convert + 9 more | Find emails |
| athensvoice.gr | #47,861 | Google Tag Manager, Let's Encrypt, OneSignal + 1 more | Find emails |
| effiliation.com | #47,901 | Google Cloud DNS, Google Trust Services, Nginx + 1 more | Find emails |
| trucksbook.eu | #47,965 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 4 more | Find emails |
| ouigo.com | #47,982 | DigiCert, Drupal, Underscore.js + 3 more | Find emails |
| campograndenews.com.br | #47,988 | Amazon Route 53, Bootstrap, Google Fonts + 4 more | Find emails |
| innocenceproject.org | #48,008 | Adobe Fonts (Typekit), Attentive, Cloudflare + 12 more | Find emails |
| stalcraft.net | #48,017 | Cloudflare, Cloudflare edge/CDN, Google Trust Services | Find emails |
| hentaienvy.com | #48,024 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 10 more | Find emails |
| danskespil.dk | #48,077 | Akamai Edge DNS, Let's Encrypt, Microsoft 365 + 2 more | Find emails |
| ahu.go.id | #48,086 | DigiCert, Foundation, Google Analytics + 3 more | Find emails |
| 7brew.com | #48,105 | Fastly, reCAPTCHA Enterprise, GoDaddy | Find emails |
| active.domains | #48,150 | Bootstrap, Cloudflare, Font Awesome + 8 more | Find emails |
| aceips.com | #48,195 | Font Awesome, Let's Encrypt | Find emails |
| parlamentnilisty.cz | #48,233 | ASP.NET, Google AdSense, Google Analytics + 6 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 965,200-domain Tranco top-1M census (run top1m-2026-08-20-full), snapshot August 21, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →