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 |
|---|---|---|---|
| freemail.hu | #17,296 | Google Tag Manager, InMobi, Next.js + 4 more | Find emails |
| business.gov.au | #17,299 | ASP.NET, Coveo, DigiCert + 9 more | Find emails |
| is.co.za | #17,303 | Akamai edge/CDN, Akamai mPulse, DigiCert + 5 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| nabble.com |
| #17,307 |
| Font Awesome, Google Analytics, Google Fonts + 4 more |
| Find emails |
| wish.com | #17,346 | Amazon Route 53, Braintree, Cloudflare Bot Management + 5 more | Find emails |
| instaread.co | #17,369 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 19 more | Find emails |
| poig.ru | #17,384 | Bootstrap, Fancybox, Nginx + 6 more | Find emails |
| animate-onlineshop.jp | #17,386 | Amazon Route 53, Apache, Bluesky + 10 more | Find emails |
| bloxd.io | #17,417 | Cloudflare, Cloudflare edge/CDN, Google Trust Services | Find emails |
| merchantcircle.com | #17,423 | Amazon (ACM), Amazon Route 53, Google AdSense + 11 more | Find emails |
| pacvue.com | #17,426 | Amazon CloudFront, Cloudflare, Cloudflare edge/CDN + 11 more | Find emails |
| tissotwatches.com | #17,456 | AOS, Azure DNS, Cloudflare edge/CDN + 6 more | Find emails |
| monkeytype.com | #17,460 | Cloudflare, Cloudflare edge/CDN, Fastly + 3 more | Find emails |
| screamingfrog.co.uk | #17,464 | Adobe Fonts (Typekit), Cloudflare, Cloudflare Bot Management + 10 more | Find emails |
| tucson.com | #17,490 | 33Across, Advertising.com, Amazon Advertising + 44 more | Find emails |
| tpserv.ru | #17,501 | Let's Encrypt, Nginx, WordPress + 3 more | Find emails |
| evolution.com | #17,520 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| lubimyczytac.pl | #17,522 | Cloudflare, Cloudflare edge/CDN, ConsentMo + 14 more | Find emails |
| clan.su | #17,529 | Bootstrap, CleanTalk, Font Awesome + 8 more | Find emails |
| sdsys.ru | #17,530 | AdRiver, All in One SEO, Font Awesome + 12 more | Find emails |
| namespro.ca | #17,531 | ASP.NET, Google Analytics, Google Fonts + 3 more | Find emails |
| fiserv.com | #17,533 | Adobe Experience Cloud (Launch), Amazon CloudFront, DigiCert + 9 more | Find emails |
| eiu.com | #17,538 | Amazon CloudFront, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| artfiles.de | #17,632 | Apache, Bluesky, ConsentMo + 5 more | Find emails |
| tolstoycomments.com | #17,673 | ASP.NET, Cloudflare, DDoS-Guard + 10 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 →