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 |
|---|---|---|---|
| ticksy.com | #15,898 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 7 more | Find emails |
| buffalonews.com | #15,910 | Amazon Advertising, Font Awesome, Google AdSense + 15 more | Find emails |
| trueanthem.com | #15,912 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 3 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| vagaro.com | #15,915 | ASP.NET, Adobe Fonts (Typekit), Font Awesome + 5 more | Find emails |
| vinmec.com | #15,952 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 3 more | Find emails |
| weber.com | #15,958 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 8 more | Find emails |
| zenbox.pl | #15,980 | DigiCert, Font Awesome, Google Tag Manager + 7 more | Find emails |
| tascontrols.com.au | #16,034 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 4 more | Find emails |
| valvesoftware.com | #16,073 | Akamai Edge DNS, Let's Encrypt, Nginx + 1 more | Find emails |
| jacobin.com | #16,109 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 5 more | Find emails |
| docdroid.net | #16,189 | Laravel, Let's Encrypt, reCAPTCHA v2 | Find emails |
| mattel163.com | #16,210 | Amazon CloudFront, Amazon Route 53, DigiCert + 8 more | Find emails |
| allmylinks.com | #16,265 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 9 more | Find emails |
| intimissimi.com | #16,273 | AB Tasty, Cloudflare edge/CDN, DigiCert + 5 more | Find emails |
| montana.edu | #16,295 | Cloudflare edge/CDN, Google Analytics, Google Tag Manager + 4 more | Find emails |
| thegamer.com | #16,342 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| devtodev.com | #16,353 | Amazon (ACM), Amazon Route 53, Google Analytics + 5 more | Find emails |
| sparknotes.com | #16,355 | Akamai Bot Manager, Bootstrap, Clarip + 14 more | Find emails |
| archive.md | #16,375 | Let's Encrypt, Nginx, reCAPTCHA v2 | Find emails |
| native-instruments.com | #16,407 | Akamai Edge DNS, Cloudflare edge/CDN, Let's Encrypt + 4 more | Find emails |
| webhouse.sk | #16,416 | Bootstrap, Cookiebot, DigiCert + 6 more | Find emails |
| postandcourier.com | #16,443 | Adobe Fonts (Typekit), Google AdSense, Google Analytics + 10 more | Find emails |
| hyundaiusa.com | #16,577 | Bambuser, Cloudflare Bot Management, Cloudflare edge/CDN + 8 more | Find emails |
| pocket-lint.com | #16,580 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| qwarta.ru | #16,618 | Google Fonts, Let's Encrypt, Nginx + 3 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 →