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 |
|---|---|---|---|
| serveris.lv | #33,507 | Apache, DigiCert, Google Analytics + 5 more | Find emails |
| tiobe.com | #33,510 | Apache, Cookiebot, Google Fonts + 10 more | Find emails |
| atresplayer.com | #33,515 | Amazon Advertising, Amazon Route 53, Didomi + 6 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| fiber.net |
| #33,535 |
| Apache, Chartbeat, DoubleClick (Google Ads) + 13 more |
| Find emails |
| reportlinker.com | #33,549 | Cloudflare, Cloudflare Bot Management, Cloudflare Turnstile + 17 more | Find emails |
| flo.com.tr | #33,556 | Google Cloud DNS, Microsoft 365, reCAPTCHA Enterprise + 1 more | Find emails |
| yesware.com | #33,557 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 18 more | Find emails |
| mangools.com | #33,576 | AddToAny, Amazon Route 53, Google Fonts + 14 more | Find emails |
| procergs.com.br | #33,577 | Font Awesome, Google Analytics, Google Tag Manager + 8 more | Find emails |
| hyperx.com | #33,587 | Adobe Fonts, Adobe Fonts (Typekit), Cloudflare edge/CDN + 7 more | Find emails |
| advisor.travel | #33,605 | AddToAny, Bootstrap, Cloudflare + 21 more | Find emails |
| seoclerk.com | #33,630 | Cloudflare, Cloudflare Turnstile, Cloudflare Web Analytics + 9 more | Find emails |
| camfrog.com | #33,632 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 19 more | Find emails |
| ohou.se | #33,644 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 16 more | Find emails |
| lostfilm.tv | #33,675 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 10 more | Find emails |
| discountasp.net | #33,684 | ASP.NET, Bootstrap, Cloudflare + 13 more | Find emails |
| streamtape.com | #33,712 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| dcfever.com | #33,721 | Cloudflare, Font Awesome, Google Analytics + 15 more | Find emails |
| legion.org | #33,737 | ASP.NET, Google Fonts, Google Tag Manager + 5 more | Find emails |
| megalink.com | #33,766 | AOS, Bootstrap, Fancybox + 9 more | Find emails |
| cloudsecurityalliance.org | #33,769 | Adobe Fonts (Typekit), Cloudflare, Cloudflare Bot Management + 8 more | Find emails |
| bdo.com | #33,780 | ASP.NET, Azure Front Door, Cloudflare + 6 more | Find emails |
| restaurant.org | #33,784 | Google Fonts, Google Hosted Libraries, Google Tag Manager + 7 more | Find emails |
| glaz.tv | #33,799 | Bootstrap, Cloudflare, Google AdSense + 8 more | Find emails |
| spendwithpennies.com | #33,803 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 4 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 →