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 |
|---|---|---|---|
| nextcloud.com | #1,030 | Bootstrap, Font Awesome, Let's Encrypt + 5 more | Find emails |
| classlink.com | #1,073 | Adobe Fonts (Typekit), Amazon Route 53, Cloudflare edge/CDN + 7 more | Find emails |
| gofundme.com | #1,110 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| hltv.org | #1,123 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 9 more | Find emails |
| lequipe.fr | #1,216 | Let's Encrypt | Find emails |
| parklogic.com | #1,237 | Font Awesome, Google Fonts, Let's Encrypt + 10 more | Find emails |
| youporn.com | #1,263 | Amazon Route 53, DebugBear, Google Analytics + 4 more | Find emails |
| redtube.com | #1,305 | Amazon Route 53, DebugBear, Google Tag Manager + 3 more | Find emails |
| dantri.com.vn | #1,322 | Google Tag Manager, Matomo, Nginx + 1 more | Find emails |
| gcash.com | #1,356 | Adobe Fonts (Typekit), Amazon Route 53, Cloudflare edge/CDN + 11 more | Find emails |
| missav.live | #1,399 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 4 more | Find emails |
| missav123.com | #1,516 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 3 more | Find emails |
| joyclub.de | #1,528 | Amazon Route 53, AppsFlyer, Cloudflare Bot Management + 4 more | Find emails |
| indianrail.gov.in | #1,539 | Bootstrap, Google Analytics, Google Publisher Tag + 1 more | Find emails |
| njavtv.com | #1,617 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 3 more | Find emails |
| xosodaiphat.com | #1,680 | ASP.NET, Cloudflare, Cloudflare edge/CDN + 2 more | Find emails |
| statuspage.io | #1,698 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 3 more | Find emails |
| xoso.com.vn | #1,715 | Cloudflare, Cloudflare edge/CDN, Google AdSense + 3 more | Find emails |
| livehindustan.com | #1,862 | Akamai Edge DNS, Akamai edge/CDN, Amazon Advertising + 7 more | Find emails |
| clickpetroleoegas.com.br | #1,868 | Cloudflare, Cloudflare edge/CDN, Google AdSense + 9 more | Find emails |
| techtarget.com | #1,991 | Cloudflare edge/CDN, Google AdSense, Google Publisher Tag + 3 more | Find emails |
| business.site | #1,993 | Google Analytics, Google Cloud DNS, Google Fonts + 3 more | Find emails |
| amocrm.ru | #2,067 | Google Ads Conversion, Google Analytics, Google Tag Manager + 3 more | Find emails |
| like.video | #2,102 | Amazon Route 53, Kong, Nginx + 1 more | Find emails |
| waze.com | #2,126 | Google Cloud DNS, Google Fonts, Google Tag Manager + 2 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 →