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 |
|---|---|---|---|
| softwareworld.co | #125,751 | Amazon CloudFront, Cloudflare, Cloudflare Web Analytics + 12 more | Find emails |
| crocusgroup.ru | #125,753 | Bitrix, Nginx, PHP + 2 more | Find emails |
| smallstep.com | #125,763 | Clearbit, Cloudflare Bot Management, Cloudflare edge/CDN + 19 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| dsvplay.com | #125,768 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 11 more | Find emails |
| ascrs.org | #125,777 | Azure API Management, Azure Front Door, Bootstrap + 14 more | Find emails |
| clodocloud.com | #125,782 | Drupal, Nginx, reCAPTCHA v2 | Find emails |
| koala.com | #125,791 | Amazon Route 53, Cloudflare edge/CDN, ConsentMo + 15 more | Find emails |
| builtinnyc.com | #125,795 | ASP.NET, Bootstrap, Cloudflare + 12 more | Find emails |
| etro.com | #125,802 | Adyen, Akamai edge/CDN, Akamai mPulse + 9 more | Find emails |
| mankatofreepress.com | #125,806 | Blockthrough, Confiant, Empower Local + 12 more | Find emails |
| mcalistersdeli.com | #125,816 | Cloudflare Bot Management, Cloudflare edge/CDN, Contentful + 8 more | Find emails |
| flyingv.cc | #125,820 | Amazon Route 53, Font Awesome, Google Fonts + 4 more | Find emails |
| houstonzoo.org | #125,839 | Amazon Route 53, Font Awesome, Google Fonts + 13 more | Find emails |
| blasto.ai | #125,840 | Google Analytics, Google Tag Manager, Mailchimp + 5 more | Find emails |
| relias.com | #125,862 | Adyen, Akamai Edge DNS, Akamai edge/CDN + 20 more | Find emails |
| theindependent.com | #125,876 | 33Across, Advertising.com, Amazon Advertising + 44 more | Find emails |
| vectormagic.com | #125,878 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| bellevue.edu | #125,879 | Amazon Route 53, Google Analytics, Google Tag Manager + 12 more | Find emails |
| tafesa.edu.au | #125,884 | ASP.NET, Azure API Management, Azure Front Door + 9 more | Find emails |
| spar.co.za | #125,885 | ASP.NET, AddThis, Azure Front Door + 15 more | Find emails |
| supershuttle.com | #125,903 | Adobe Fonts (Typekit), Ahrefs Analytics, Bootstrap + 16 more | Find emails |
| allvoices.co | #125,908 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 7 more | Find emails |
| openingstijden.com | #125,912 | Apache, Google AdSense, Google Analytics + 6 more | Find emails |
| iicrc.org | #125,917 | ASP.NET, Font Awesome, Google Analytics + 11 more | Find emails |
| gerber.com | #125,936 | Adobe Fonts, Adobe Fonts (Typekit), Akamai Bot Manager + 14 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 →