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 |
|---|---|---|---|
| thebodyshop.com | #34,001 | Cloudflare edge/CDN, Let's Encrypt, Microsoft 365 + 5 more | Find emails |
| virtbiz.com | #34,025 | Bootstrap, Font Awesome, Google Fonts + 6 more | Find emails |
| antee.cz | #34,038 | DigiCert, Google Fonts, Google Tag Manager + 6 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| signup.com | #34,050 | Amazon (ACM), ConsentMo, Font Awesome + 6 more | Find emails |
| chatmate.tv | #34,057 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 13 more | Find emails |
| laopinion.com | #34,060 | Cloudflare, Google Fonts, Google Publisher Tag + 6 more | Find emails |
| penso.com.br | #34,091 | Google Tag Manager, Sectigo, Swiper + 2 more | Find emails |
| eidos.com | #34,119 | Amazon Route 53, Google Tag Manager, Let's Encrypt + 9 more | Find emails |
| nordicway.dk | #34,132 | Bootstrap, Let's Encrypt, WordPress + 2 more | Find emails |
| fsist.com.br | #34,161 | Amazon Route 53, reCAPTCHA v3 | Find emails |
| register.be | #34,185 | Google Fonts, Google Tag Manager, PHP + 3 more | Find emails |
| spectrumsurveys.com | #34,196 | Amazon (ACM), Amazon Route 53, AngularJS + 7 more | Find emails |
| perlego.com | #34,291 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 5 more | Find emails |
| definitions.net | #34,358 | Amazon (ACM), Amazon Route 53, Google Fonts + 2 more | Find emails |
| fritz.com | #34,403 | Cloudflare edge/CDN, Klaviyo, Let's Encrypt + 6 more | Find emails |
| rubylane.com | #34,415 | Amazon (ACM), Amazon Route 53, Amazon Web Services + 1 more | Find emails |
| teamusa.org | #34,435 | Adobe Fonts (Typekit), Akamai Edge DNS, Cloudinary + 7 more | Find emails |
| hipcamp.com | #34,440 | Cloudflare, Cloudinary, Google Tag Manager + 6 more | Find emails |
| cardinalhealth.com | #34,460 | Adobe Experience Cloud (Launch), Adobe Fonts (Typekit), Akamai Bot Manager + 9 more | Find emails |
| githubstatus.com | #34,469 | Amazon CloudFront, Amazon Route 53, Atlassian Statuspage + 6 more | Find emails |
| shopgoodwill.com | #34,473 | Azure DNS, Braintree, DigiCert + 6 more | Find emails |
| problogger.com | #34,503 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 8 more | Find emails |
| vuoriclothing.com | #34,510 | Adobe Fonts (Typekit), Let's Encrypt, Microsoft 365 + 2 more | Find emails |
| supremocontrol.com | #34,552 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| myteamspeak.com | #34,568 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 7 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 →