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 |
|---|---|---|---|
| f95zone.to | #4,262 | Bluesky, Cloudflare, Cloudflare Web Analytics + 10 more | Find emails |
| backblazeb2.com | #4,273 | AWS Lambda, Cloudflare, Cloudflare edge/CDN + 11 more | Find emails |
| easydns.com | #4,321 | AddToAny, Adobe Fonts (Typekit), Apache + 9 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| tinkercad.com | #4,346 | Amazon CloudFront, Amazon Route 53, Bootstrap + 4 more | Find emails |
| thesaurus.com | #4,367 | Amazon Advertising, Amazon Route 53, Blockthrough + 11 more | Find emails |
| foreignpolicy.com | #4,406 | Cloudflare, Cloudflare edge/CDN, Google Hosted Libraries + 6 more | Find emails |
| ucoz.net | #4,408 | Bootstrap, CleanTalk, Font Awesome + 8 more | Find emails |
| lookmovie2.to | #4,433 | Google Analytics, Google Fonts, Google Tag Manager + 5 more | Find emails |
| carrd.co | #4,452 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| liveinternet.ru | #4,455 | AdRiver, Fancybox, Google AdSense + 8 more | Find emails |
| lastampa.it | #4,472 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| imageshack.com | #4,487 | Google Analytics, Google Fonts, Google Tag Manager + 4 more | Find emails |
| packagist.org | #4,493 | Bunny CDN, BunnyCDN, Google Fonts + 7 more | Find emails |
| everydayhealth.com | #4,516 | Amazon Advertising, Amazon Route 53, Google Fonts + 6 more | Find emails |
| zebra.com | #4,569 | Adobe Experience Cloud (Launch), Adobe Fonts (Typekit), Azure DNS + 7 more | Find emails |
| turnitin.com | #4,577 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 11 more | Find emails |
| paysafecard.com | #4,578 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| collider.com | #4,598 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| polygon.com | #4,610 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| peatix.com | #4,630 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| xda-developers.com | #4,652 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| aqsi.ru | #4,687 | Bootstrap, Google Fonts, Nginx + 10 more | Find emails |
| pbase.com | #4,725 | Amazon (ACM), Amazon Route 53, Apache + 1 more | Find emails |
| dmm.com | #4,729 | Akamai Edge DNS, Amazon CloudFront, Google Optimize + 5 more | Find emails |
| xmlsoft.org | #4,739 | Fastly, Let's Encrypt, OpenResty + 3 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 →