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 |
|---|---|---|---|
| iceporn.com | #50,687 | Cloudflare, Google Analytics, Let's Encrypt + 3 more | Find emails |
| burga.com | #50,692 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 9 more | Find emails |
| fiskars.com | #50,705 | CSC (Digital Brand Services), Cloudflare edge/CDN, Let's Encrypt + 5 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| alohaorderonline.com | #50,708 | ASP.NET, Cloudflare Bot Management, Cloudflare Web Analytics + 9 more | Find emails |
| k-bid.com | #50,715 | Amazon (ACM), Amazon Route 53, Apache + 13 more | Find emails |
| toyota.ca | #50,729 | Adobe Experience Manager Edge Delivery (Helix RUM), Amazon CloudFront, Apache + 8 more | Find emails |
| na4u.ru | #50,734 | DDoS-Guard, Let's Encrypt, Mindbox + 4 more | Find emails |
| cooltext.com | #50,738 | Google AdSense, Let's Encrypt, Microsoft IIS + 2 more | Find emails |
| wkbw.com | #50,755 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 14 more | Find emails |
| discgolfscene.com | #50,758 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| helium10.com | #50,760 | Amazon (ACM), Amazon CloudFront, Bootstrap + 18 more | Find emails |
| sohonet.com | #50,765 | AWS Lambda, Cloudflare edge/CDN, Google Fonts + 8 more | Find emails |
| univ-angers.fr | #50,767 | Ametys CMS, Apache, Bluesky + 4 more | Find emails |
| pecheur.com | #50,770 | AB Tasty, Cloudflare Bot Management, Cloudflare edge/CDN + 3 more | Find emails |
| pdf4pro.com | #50,772 | Bootstrap, Cloudflare, Google AdSense + 6 more | Find emails |
| bestdates.com | #50,779 | Cloudflare, Cloudflare edge/CDN, Fingerprint Pro + 7 more | Find emails |
| unab.cl | #50,784 | AOS, All in One SEO, Cloudflare + 10 more | Find emails |
| healthyplace.com | #50,786 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| bookmap.com | #50,811 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 17 more | Find emails |
| jamesavery.com | #50,821 | Adobe Fonts (Typekit), Amazon Route 53, Cloudflare edge/CDN + 11 more | Find emails |
| vestaboard.com | #50,822 | Adobe Fonts (Typekit), Bootstrap, Cloudflare Bot Management + 22 more | Find emails |
| citiprogram.org | #50,828 | Adyen, Azure DNS, Brightcove + 31 more | Find emails |
| idknet.com | #50,834 | Bootstrap, Google Analytics, Google Fonts + 6 more | Find emails |
| andelemandele.lv | #50,861 | Cloudflare, Gemius, Google Tag Manager + 3 more | Find emails |
| onetreeplanted.org | #50,870 | Cloudflare edge/CDN, Fancybox, Google Hosted Libraries + 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 →