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 |
|---|---|---|---|
| fitmentindustries.com | #44,955 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| mindomo.com | #44,957 | Apache, Astro, Google Cloud DNS + 3 more | Find emails |
| syncfusion.com | #45,015 | ASP.NET, Cloudflare, Cloudflare Web Analytics + 10 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| casper.com | #45,022 | Affirm, Attentive, Cloudflare + 6 more | Find emails |
| phpwebhosting.com | #45,040 | AOS, Bootstrap, Crisp + 10 more | Find emails |
| frontegg.com | #45,043 | AOS, AddToAny, Amazon (ACM) + 16 more | Find emails |
| loria.fr | #45,060 | Bluesky, Bootstrap, Elementor + 13 more | Find emails |
| gamemag.ru | #45,064 | Bootstrap, Google Analytics, Google Tag Manager + 10 more | Find emails |
| linx.com.br | #45,070 | Amazon Route 53, Amplitude, Bootstrap + 20 more | Find emails |
| taxjar.com | #45,104 | Amazon CloudFront, Atlassian Cloud, Cloudflare + 23 more | Find emails |
| lums.edu.pk | #45,122 | Apache, Bootstrap, Drupal + 15 more | Find emails |
| bandzone.cz | #45,130 | Apache, Cloudflare, Gemius + 11 more | Find emails |
| barion.com | #45,131 | ASP.NET, Builder.io, Cloudflare + 18 more | Find emails |
| greeka.com | #45,145 | Google Analytics, Google Fonts, Let's Encrypt + 2 more | Find emails |
| domainmonger.com | #45,169 | Font Awesome, Let's Encrypt, LiteSpeed + 3 more | Find emails |
| jensonusa.com | #45,175 | Azure API Management, Cloudflare edge/CDN, Extend + 7 more | Find emails |
| officelife.media | #45,197 | Bitrix, Google Analytics, Google Tag Manager + 8 more | Find emails |
| 4goodhosting.com | #45,202 | Ahrefs Analytics, Font Awesome, Google Analytics + 10 more | Find emails |
| easee.com | #45,215 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 15 more | Find emails |
| u2.com | #45,226 | Amazon Route 53, Attentive, Cloudflare edge/CDN + 4 more | Find emails |
| vikingdeals.be | #45,227 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| wbplay.com | #45,230 | Amazon (ACM), Amazon Route 53, Modernizr + 3 more | Find emails |
| goldencollections.net | #45,236 | Cloudflare edge/CDN, Google Cloud DNS, Google Fonts + 8 more | Find emails |
| geekbuying.com | #45,237 | AddThis, Amazon (ACM), Amazon CloudFront + 14 more | Find emails |
| codecov.io | #45,239 | AWS Lambda, Amazon CloudFront, Atlassian Cloud + 29 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 →