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 |
|---|---|---|---|
| imgtec.com | #133,458 | Adobe Fonts (Typekit), Cloudflare Bot Management, Cloudflare edge/CDN + 11 more | Find emails |
| frequenz.com | #133,472 | AWS Lambda, Cloudflare edge/CDN, Google Tag Manager + 4 more | Find emails |
| dch.cl | #133,492 | Ahrefs Analytics, Apache, Bootstrap + 9 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| snia.org | #133,519 | Cloudflare, Cloudflare edge/CDN, Drupal + 14 more | Find emails |
| baseus.com | #133,526 | Alibaba Cloud DNS, Bootstrap, Cloudflare edge/CDN + 14 more | Find emails |
| getgalore.com | #133,530 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 13 more | Find emails |
| thamesandhudson.com | #133,535 | Cloudflare edge/CDN, Let's Encrypt, Shopify + 2 more | Find emails |
| bond-touch.com | #133,556 | Cloudflare, Cloudflare edge/CDN, Intelligems + 8 more | Find emails |
| travel4u.com.tw | #133,575 | Amazon Route 53, Bootstrap, Font Awesome + 7 more | Find emails |
| nethost.co.il | #133,591 | Font Awesome, Google Analytics, Google Fonts + 8 more | Find emails |
| lakeside.com | #133,593 | Amazon Route 53, Cloudflare edge/CDN, Google Fonts + 11 more | Find emails |
| bsscommerce.com | #133,595 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 18 more | Find emails |
| building.co.uk | #133,606 | ASP.NET, Amazon (ACM), GetSiteControl + 12 more | Find emails |
| do-re.com.tr | #133,620 | Apache, Bootstrap, Cloudflare + 19 more | Find emails |
| witf.org | #133,621 | Amazon Route 53, Chartbeat, CrazyEgg + 12 more | Find emails |
| jeebr.net | #133,626 | Apache, Divi, Google Analytics + 7 more | Find emails |
| scimagoir.com | #133,628 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 3 more | Find emails |
| atua.com.br | #133,660 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 18 more | Find emails |
| usemax.de | #133,663 | Apache, Bootstrap, Fancybox + 9 more | Find emails |
| nationalwi-fi.com | #133,683 | ASP.NET, Bootstrap, Cloudflare + 12 more | Find emails |
| edikted.co.uk | #133,695 | Adobe Fonts (Typekit), Cloudflare edge/CDN, Global-e + 12 more | Find emails |
| hartfordhealthcare.org | #133,713 | Adobe Fonts (Typekit), DigiCert, Font Awesome + 8 more | Find emails |
| emerging-europe.com | #133,724 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| alojalia.com | #133,731 | Bootstrap, DigiCert, Font Awesome + 9 more | Find emails |
| aiep.cl | #133,735 | Cloudflare edge/CDN, Font Awesome, Google Analytics + 8 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 →