CAPTCHA & Bot Protection
90,376 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (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 | 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 |
|---|---|---|---|
| shift4shop.com | #104,992 | Adobe Fonts (Typekit), Cloudflare, Cloudflare Bot Management + 14 more | Find emails |
| hometownsource.com | #104,995 | Blockthrough, Cloudflare edge/CDN, DoubleClick (Google Ads) + 13 more | Find emails |
| uhost.mk | #105,004 | Apache, Font Awesome, Google Analytics + 7 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| nsk.hr | #105,017 | Apache, Google Analytics, Google Fonts + 7 more | Find emails |
| sonline.su | #105,035 | Bootstrap, Font Awesome, Google Ads Conversion + 10 more | Find emails |
| kizik.com | #105,043 | Cloudflare edge/CDN, Global-e, Google Tag Manager + 8 more | Find emails |
| aci.aero | #105,053 | Bootstrap, Font Awesome, Google Fonts + 13 more | Find emails |
| audiobookstore.com | #105,054 | ASP.NET, Bootstrap, Cloudflare + 11 more | Find emails |
| danatoto71.com | #105,060 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 12 more | Find emails |
| aviatornation.com | #105,074 | Cloudflare, Cloudflare edge/CDN, ConsentMo + 9 more | Find emails |
| ktbs.com | #105,077 | DoubleClick (Google Ads), Font Awesome, Google AdSense + 10 more | Find emails |
| inah.gob.mx | #105,085 | Apache, Blogger, Font Awesome + 11 more | Find emails |
| elloha.com | #105,095 | ASP.NET, AWS Lambda, Adobe Fonts (Typekit) + 24 more | Find emails |
| filext.com | #105,096 | Cloudflare, Cloudflare edge/CDN, Consentmanager.net + 1 more | Find emails |
| inss.org.il | #105,100 | Cloudflare edge/CDN, DoubleClick (Google Ads), Elementor + 10 more | Find emails |
| nfcc.org | #105,109 | Amazon (ACM), Amazon Route 53, Apache + 12 more | Find emails |
| tubeon.com | #105,110 | Cloudflare, Google Analytics, Let's Encrypt + 3 more | Find emails |
| gateway.com | #105,113 | ASP.NET, Akamai Bot Manager, Akamai edge/CDN + 11 more | Find emails |
| covetedclaws.com | #105,119 | Cloudflare edge/CDN, Google Cloud DNS, Let's Encrypt + 3 more | Find emails |
| encyclopediavirginia.org | #105,127 | Google Analytics, Google Maps, Google Tag Manager + 7 more | Find emails |
| atout-france.fr | #105,137 | AddToAny, Apache, ConsentMo + 5 more | Find emails |
| intelliad.de | #105,143 | Apache, Google Analytics, PHP + 8 more | Find emails |
| exacteditions.com | #105,146 | Amazon (ACM), Amazon Route 53, Font Awesome + 7 more | Find emails |
| zippo.com | #105,192 | CSC (Digital Brand Services), Cloudflare edge/CDN, Klaviyo + 6 more | Find emails |
| adplugg.com | #105,217 | Amazon CloudFront, Amazon Route 53, AngularJS + 26 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →