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 |
|---|---|---|---|
| ffonts.net | #118,583 | DigiCert, Google Analytics, Google Fonts + 3 more | Find emails |
| u-energo.ru | #118,600 | Bitrix, Bootstrap, Fancybox + 11 more | Find emails |
| studyladder.com.au | #118,689 | Amazon (ACM), Amazon Route 53, Bootstrap + 10 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| flyone.eu | #118,708 | ASP.NET, Amazon Route 53, Bootstrap + 12 more | Find emails |
| sportstiming.dk | #118,725 | Font Awesome, Google Analytics, Google Fonts + 12 more | Find emails |
| itools.mn | #118,727 | Font Awesome, Next.js, Nginx + 5 more | Find emails |
| smitefire.com | #118,758 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 8 more | Find emails |
| moluch.ru | #118,765 | Django, Fancybox, Google Analytics + 9 more | Find emails |
| deliverysolutions.co | #118,768 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 25 more | Find emails |
| e-xecutive.ru | #118,816 | Google Fonts, Let's Encrypt, Nginx + 4 more | Find emails |
| unimedia.fr | #118,819 | Apache, Didomi, Google Tag Manager + 3 more | Find emails |
| lskd.co | #118,825 | Algolia, Cloudflare, Cloudflare edge/CDN + 13 more | Find emails |
| musik-produktiv.com | #118,830 | Bunny CDN, BunnyCDN, Google Tag Manager + 4 more | Find emails |
| personalcapital.com | #118,831 | Amplitude, BugHerd, Cloudflare + 20 more | Find emails |
| kuiu.com | #118,886 | Cloudflare edge/CDN, Global-e, Klaviyo + 11 more | Find emails |
| 1cbo.ru | #118,921 | Bitrix, Bootstrap, Font Awesome + 8 more | Find emails |
| daijob.com | #118,966 | Amazon (ACM), Bootstrap, Font Awesome + 12 more | Find emails |
| harvardartmuseums.org | #118,982 | Amazon Route 53, Cloudflare Bot Management, Cloudflare Turnstile + 10 more | Find emails |
| intelsvyaz.ru | #118,984 | Apache, Google Fonts, Let's Encrypt + 1 more | Find emails |
| explosion.ru | #118,988 | Let's Encrypt, Modernizr, Nginx + 2 more | Find emails |
| bionexo.com | #118,992 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 8 more | Find emails |
| audi-sport.net | #118,993 | ConsentMo, Google AdSense, Google Analytics + 7 more | Find emails |
| barbie.com | #118,999 | Adobe Fonts (Typekit), Bazaarvoice, Cloudflare edge/CDN + 11 more | Find emails |
| kosmos.de | #119,000 | Cloudflare edge/CDN, Judge.me, Let's Encrypt + 4 more | Find emails |
| wifisystem.ru | #119,012 | Bootstrap, Font Awesome, Google Fonts + 11 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 →