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 |
|---|---|---|---|
| f-list.net | #124,575 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| grabien.com | #124,588 | Amazon Route 53, Google Ads Conversion, Google Analytics + 5 more | Find emails |
| homeshop.dk | #124,607 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 10 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| aupair.com | #124,612 | Apache, PHP, reCAPTCHA v2 + 1 more | Find emails |
| jubileewebhost.com | #124,615 | AddThis, Apache, Bootstrap + 16 more | Find emails |
| kveller.com | #124,621 | Cloudflare, DoubleClick (Google Ads), Fastly + 17 more | Find emails |
| scrollscan.com | #124,666 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 5 more | Find emails |
| doska.info | #124,670 | Cloudflare, Font Awesome, Let's Encrypt + 6 more | Find emails |
| findnerd.com | #124,680 | Apache, Bootstrap, Express + 6 more | Find emails |
| bjc.org | #124,692 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 11 more | Find emails |
| arcat.com | #124,707 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 1 more | Find emails |
| tdf.org | #124,737 | Adyen, Brightcove, Cloudflare edge/CDN + 18 more | Find emails |
| fotop.com.br | #124,750 | Amazon (ACM), Amazon Route 53, Apache + 13 more | Find emails |
| coollib.net | #124,753 | Drupal, Let's Encrypt, MGID + 3 more | Find emails |
| yottasrc.com | #124,762 | Ahrefs Analytics, Bootstrap, Cloudflare + 23 more | Find emails |
| dentonrc.com | #124,764 | Blockthrough, DoubleClick (Google Ads), Google Fonts + 9 more | Find emails |
| sesami.co | #124,784 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 11 more | Find emails |
| mydpd.at | #124,803 | DigiCert, Google Ads Conversion, Google Analytics + 6 more | Find emails |
| myviewboard.com | #124,809 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 23 more | Find emails |
| abogacia.es | #124,819 | Bootstrap, Cookiebot, Font Awesome + 16 more | Find emails |
| ridefox.com | #124,827 | Cloudflare, Cloudflare edge/CDN, ConsentMo + 10 more | Find emails |
| kokeshi.com.br | #124,837 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 9 more | Find emails |
| rhone.ch | #124,839 | Font Awesome, Let's Encrypt, Nginx + 2 more | Find emails |
| digimap.co.id | #124,858 | Adobe Experience Cloud (Launch), Amazon Advertising, Cloudflare edge/CDN + 15 more | Find emails |
| martinguitar.com | #124,875 | Cloudflare, Cloudflare edge/CDN, Google Maps + 7 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 →