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 |
|---|---|---|---|
| fameviso.com | #90,765 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 11 more | Find emails |
| filminvazio.pro | #90,766 | Apache, Font Awesome, Google Fonts + 8 more | Find emails |
| zona.com.br | #90,798 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 9 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| vksuexams.com | #90,811 | ASP.NET, Bootstrap, Google Hosted Libraries + 6 more | Find emails |
| agbis.ru | #90,818 | Bitrix, Bootstrap, Font Awesome + 14 more | Find emails |
| redkassa.ru | #90,820 | ASP.NET, Google Tag Manager, Qrator + 3 more | Find emails |
| elcat.kg | #90,821 | Apache, Google Analytics, Google Tag Manager + 5 more | Find emails |
| redchief.in | #90,827 | Cloudflare edge/CDN, Google Tag Manager, Judge.me + 5 more | Find emails |
| peets.com | #90,836 | Adobe Fonts (Typekit), Attentive, Azure DNS + 10 more | Find emails |
| gigabaito.com | #90,845 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| idiomacr.com | #90,875 | Font Awesome, Google Fonts, Microsoft 365 + 8 more | Find emails |
| cadence.lv | #90,888 | Google Analytics, Microsoft 365, Nginx + 1 more | Find emails |
| caravansitefinder.co.uk | #90,908 | Campaign Monitor, Cloudflare, Cloudflare Web Analytics + 14 more | Find emails |
| best-hosting.ru | #90,917 | ASP.NET, Let's Encrypt, Nginx + 1 more | Find emails |
| wearcomet.com | #90,987 | Cloudflare edge/CDN, ConsentMo, Datadog + 12 more | Find emails |
| adnoc.ae | #91,028 | Amazon CloudFront, Google Maps, Mapbox + 5 more | Find emails |
| bseducativo.com | #91,035 | ASP.NET, Bootstrap, Cloudflare + 10 more | Find emails |
| ifaplanet.com | #91,042 | Apache, Bootstrap, Font Awesome + 6 more | Find emails |
| lex.dk | #91,043 | Google Cloud DNS, Hotwire Turbo, Let's Encrypt + 3 more | Find emails |
| ctxt.io | #91,066 | Cloudflare, Google Analytics, Google Cloud + 5 more | Find emails |
| classic-trader.com | #91,097 | Cloudflare, Cloudflare edge/CDN, Cookiebot + 10 more | Find emails |
| hostingcentar.com | #91,110 | Apache, Bootstrap, Font Awesome + 6 more | Find emails |
| pm52.ru | #91,119 | Fancybox, Google Analytics, Google Fonts + 10 more | Find emails |
| jethost.uz | #91,123 | AOS, Bootstrap, Font Awesome + 6 more | Find emails |
| thesixthaxis.com | #91,149 | Bluesky, Cloudflare, Cloudflare Turnstile + 13 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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →