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 |
|---|---|---|---|
| stripes.com | #13,939 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 19 more | Find emails |
| campaignmonitor.com | #13,941 | Campaign Monitor, Cloudflare Bot Management, Cloudflare edge/CDN + 14 more | Find emails |
| the-independent.com | #13,949 | Cloudflare, Fastly, Index Exchange + 5 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| cbsi.com | #13,966 | AOS, Akamai Bot Manager, Akamai edge/CDN + 9 more | Find emails |
| tass.com | #13,970 | AngularJS, Google Fonts, LiveInternet (Yadro) + 7 more | Find emails |
| amcrestcloud.com | #13,996 | Amazon Route 53, Apache, Google Analytics + 3 more | Find emails |
| film.ru | #14,003 | Drupal, Fancybox, Google Fonts + 10 more | Find emails |
| speedsmart.net | #14,026 | CDN Fonts, Cloudflare Web Analytics, Fancybox + 14 more | Find emails |
| newsnow.co.uk | #14,039 | Adobe Fonts (Typekit), Amazon Route 53, Apache + 4 more | Find emails |
| sitezoogle.com | #14,049 | Let's Encrypt, OpenResty, Ruby on Rails + 2 more | Find emails |
| ydns.eu | #14,050 | Bootstrap, Django, Font Awesome + 3 more | Find emails |
| eso.org | #14,068 | Django, Fancybox, Feedburner + 4 more | Find emails |
| zenwriting.net | #14,072 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 2 more | Find emails |
| chomikuj.pl | #14,103 | ASP.NET, Cloudflare, Cloudflare edge/CDN + 2 more | Find emails |
| ipgeolocation.io | #14,115 | Bluesky, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| setmore.com | #14,119 | Amazon Route 53, Apple Pay, Braintree + 12 more | Find emails |
| advertising.com | #14,125 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 7 more | Find emails |
| phoca.cz | #14,169 | Apache, Font Awesome, Google AdSense + 6 more | Find emails |
| sonnen.de | #14,170 | AWS Lambda, Cloudflare edge/CDN, Google Tag Manager + 8 more | Find emails |
| unu.edu | #14,175 | Drupal, Fastly, Google Tag Manager + 8 more | Find emails |
| netinfo.bg | #14,191 | Apache, Bootstrap, Font Awesome + 8 more | Find emails |
| cottonon.com | #14,202 | Bazaarvoice, Cloudflare edge/CDN, Google Tag Manager + 9 more | Find emails |
| nrf.com | #14,209 | BrightEdge, Google Fonts, Google Tag Manager + 8 more | Find emails |
| haskell.org | #14,211 | Amazon CloudFront, Bootstrap, Clicky + 10 more | Find emails |
| freddiemac.com | #14,215 | Adobe Fonts (Typekit), Amazon CloudFront, Cloudflare Bot Management + 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-2026-08-25-full-v2), snapshot August 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →