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 |
|---|---|---|---|
| catcar.info | #41,988 | Cloudflare, Google AdSense, Google Analytics + 6 more | Find emails |
| palm.com | #42,020 | CSC (Digital Brand Services), Cloudflare edge/CDN, Let's Encrypt + 3 more | Find emails |
| thelondonneurocognitiveclinic.co.uk | #42,022 | Google Analytics, Google Fonts, Google Tag Manager + 4 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| pinknews.co.uk | #42,069 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 8 more | Find emails |
| corcoran.com | #42,078 | Amazon CloudFront, Amazon Route 53, Bootstrap + 8 more | Find emails |
| porndoe.com | #42,085 | Cloudflare, Google Analytics, Google Fonts + 4 more | Find emails |
| fentybeauty.com | #42,089 | Akamai Edge DNS, Attentive, Clarip + 8 more | Find emails |
| veniceai-status.com | #42,098 | Amazon CloudFront, Atlassian Statuspage, Cloudflare + 5 more | Find emails |
| bienpublic.com | #42,102 | ConsentMo, DigiCert, Google Tag Manager + 1 more | Find emails |
| auctria.com | #42,162 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 3 more | Find emails |
| itmwpb.com | #42,179 | Amazon (ACM), Amazon Route 53, Bootstrap + 8 more | Find emails |
| carsdirect.com | #42,181 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 3 more | Find emails |
| hostingperte.it | #42,206 | Bootstrap, Google Tag Manager, Microsoft Clarity + 5 more | Find emails |
| techtitute.com | #42,211 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 3 more | Find emails |
| sorenson.com | #42,262 | Cloudflare Bot Management, Cloudflare edge/CDN, Foundation + 4 more | Find emails |
| mecca.com | #42,269 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| hublot.com | #42,290 | AB Tasty, Akamai Bot Manager, Akamai mPulse + 5 more | Find emails |
| agriculture.gov.au | #42,298 | Akamai Bot Manager, Azure DNS, Drupal + 5 more | Find emails |
| ptcloud.de | #42,313 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| technode.com | #42,315 | Cloudflare, Google Analytics, Google Tag Manager + 8 more | Find emails |
| haulmont.com | #42,365 | Let's Encrypt, Microsoft 365, Netlify + 3 more | Find emails |
| alderongames.com | #42,395 | Adobe Fonts (Typekit), Cloudflare, Cloudflare Bot Management + 8 more | Find emails |
| ingate.ru | #42,397 | Google Tag Manager, PHP, cdnjs + 1 more | Find emails |
| momcozy.com | #42,433 | Cloudflare edge/CDN, Google Ads Conversion, Google Analytics + 6 more | Find emails |
| rjf.com | #42,438 | Akamai Bot Manager, Akamai Edge DNS, Akamai mPulse + 4 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 →