CAPTCHA & Bot Protection
91,344 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9.1%). 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 | snapchat.com | #123 (Tranco) | Find emails |
| 2 | apache.org | #125 (Tranco) | Find emails |
| 3 | one.one | #160 (Tranco) | Find emails |
| 4 | w3.org |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| pirelli.com | #16,681 | Amazon CloudFront, DigiCert, DoubleClick (Google Ads) + 5 more | Find emails |
| interpals.net | #16,713 | Cloudflare, Cloudflare Turnstile, Cloudflare edge/CDN + 13 more | Find emails |
| captivate.fm | #16,735 | Adobe Fonts (Typekit), Amazon CloudFront, Cloudflare + 23 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| i.ua | #16,794 | Admixer, Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| litespeedtech.com | #16,814 | Cloudflare, Let's Encrypt, LiteSpeed | Find emails |
| netnames.net | #16,819 | Azure Front Door, Bootstrap, Google Tag Manager + 5 more | Find emails |
| passkey.com | #16,820 | 6sense, Adobe Experience Cloud (Launch), Amazon (ACM) + 17 more | Find emails |
| cheaptickets.nl | #16,833 | Akamai Edge DNS, Cloudflare Web Analytics, DigiCert + 6 more | Find emails |
| hypr.com | #16,835 | Adyen, Amazon CloudFront, Amazon Route 53 + 24 more | Find emails |
| christianbook.com | #16,841 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 10 more | Find emails |
| psychologicalscience.org | #16,843 | ASP.NET, Adobe Fonts (Typekit), Azure API Management + 15 more | Find emails |
| giveawayoftheday.com | #16,856 | Amazon Route 53, Google AdSense, Google Analytics + 11 more | Find emails |
| pge.com | #16,860 | Adobe Audience Manager, Adobe Experience Cloud (Launch), Adobe Target + 32 more | Find emails |
| stingray.com | #16,884 | AOS, AddToAny, Amazon Route 53 + 11 more | Find emails |
| solutionslabkit.com | #16,886 | GoDaddy Website Builder, GoDaddy | Find emails |
| flashback.org | #16,899 | Bootstrap, Google Analytics, Google Tag Manager + 4 more | Find emails |
| deputy.com | #16,908 | Amazon Route 53, Cloudflare edge/CDN, Google Fonts + 4 more | Find emails |
| boddlelearning.com | #16,915 | AWS Lambda, Amazon Route 53, Atlassian Statuspage + 20 more | Find emails |
| policybazaar.com | #16,918 | Akamai Bot Manager, Akamai edge/CDN, Amazon Route 53 + 10 more | Find emails |
| ibotta.com | #16,920 | Adobe Fonts, Adobe Fonts (Typekit), Amazon (ACM) + 27 more | Find emails |
| ioncube.com | #16,931 | Apache, DoubleClick (Google Ads), Font Awesome + 15 more | Find emails |
| quebec.ca | #16,946 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
| bitsdujour.com | #16,985 | ASP.NET, Amazon Route 53, Google AdSense + 5 more | Find emails |
| dwell.com | #17,008 | Amazon (ACM), Amazon Route 53, cdnjs + 1 more | Find emails |
| danviet.vn | #17,010 | Cloudflare, Cloudflare edge/CDN, 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 1,000,000-domain Tranco top-1M census (run top1m-2026-08-25-full-v2), snapshot August 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →