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 |
|---|---|---|---|
| naa.gov.au | #41,643 | Akamai Bot Manager, Akamai edge/CDN, Drupal + 6 more | Find emails |
| 911memorial.org | #41,645 | ASP.NET, Clicky, CrazyEgg + 15 more | Find emails |
| tenderly.co | #41,647 | Astro, Atlassian Statuspage, Bootstrap + 16 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| zonedns.vn |
| #41,651 |
| Apache, Bootstrap, Font Awesome + 8 more |
| Find emails |
| wirenboard.com | #41,654 | Cloudflare, Google Analytics, Google Tag Manager + 10 more | Find emails |
| fishbrain.com | #41,658 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 9 more | Find emails |
| kueskipay.com | #41,668 | AWS Lambda, Amazon Route 53, Braze + 10 more | Find emails |
| westminster.ac.uk | #41,680 | Cloudflare Bot Management, Cloudflare edge/CDN, Drupal + 7 more | Find emails |
| towson.edu | #41,681 | ASP.NET, Adobe Fonts (Typekit), Azure DNS + 15 more | Find emails |
| cesnet.cz | #41,692 | Apache, Google Analytics, Google Tag Manager + 4 more | Find emails |
| smokeball.com | #41,704 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 10 more | Find emails |
| cloudcraft.co | #41,708 | AWS Lambda, Amazon CloudFront, Amazon Route 53 + 18 more | Find emails |
| omdbapi.com | #41,725 | ASP.NET, Bootstrap, Cloudflare + 8 more | Find emails |
| nitroflare.com | #41,754 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 8 more | Find emails |
| firstmonday.org | #41,755 | Font Awesome, Google Analytics, Google Tag Manager + 6 more | Find emails |
| facethefuture.store | #41,761 | Attentive, Bazaarvoice, Cloudflare edge/CDN + 10 more | Find emails |
| pima.edu | #41,768 | Azure API Management, Azure Front Door, Bootstrap + 15 more | Find emails |
| keywordseverywhere.com | #41,776 | ConsentMo, Google Ads Conversion, Google Analytics + 10 more | Find emails |
| olaelectric.com | #41,792 | Akamai Edge DNS, DigiCert, Magento | Find emails |
| vpnunlimitedapp.com | #41,799 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 3 more | Find emails |
| gov.hr | #41,803 | Google Analytics, Google Tag Manager, jQuery + 3 more | Find emails |
| quironsalud.com | #41,810 | Adform, Akamai Bot Manager, Akamai Edge DNS + 19 more | Find emails |
| evo.com | #41,814 | Attentive, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| aremedia.com.au | #41,818 | CSC (Digital Brand Services), Cloudflare Bot Management, Cloudflare edge/CDN + 11 more | Find emails |
| trendforce.com | #41,826 | Amazon Route 53, Bootstrap, DigiCert + 12 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 →