CAPTCHA & Bot Protection
90,376 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9%). 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 |
|---|---|---|---|
| ultimedia.com | #38,147 | Amazon Route 53, Bootstrap, Fancybox + 7 more | Find emails |
| atlinkservices.com | #38,162 | AWS Lambda, Cloudflare edge/CDN, Elfsight + 9 more | Find emails |
| outbyte.com | #38,167 | Amazon Route 53, Bootstrap, Google Analytics + 11 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| rememberthemilk.com | #38,172 | Amazon CloudFront, Amazon Route 53, Azure DNS + 16 more | Find emails |
| contactmusic.com | #38,173 | ASP.NET, Azure API Management, Azure DNS + 8 more | Find emails |
| fluentu.com | #38,202 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| sim-networks.com | #38,221 | AOS, Cloudflare Turnstile, Font Awesome + 11 more | Find emails |
| ttarget.ru | #38,223 | Bootstrap, Fancybox, Font Awesome + 11 more | Find emails |
| i-bidder.com | #38,226 | ASP.NET, Amazon (ACM), Amazon CloudFront + 16 more | Find emails |
| recart.com | #38,233 | AWS Lambda, Amazon CloudFront, Cloudflare + 16 more | Find emails |
| cyberfuel.com | #38,234 | Bootstrap, Google Fonts, Google Tag Manager + 9 more | Find emails |
| shoecarnival.com | #38,244 | AB Tasty, Amazon CloudFront, Amplience + 10 more | Find emails |
| stardoll.com | #38,246 | Akamai Edge DNS, DigiCert, Google Analytics + 4 more | Find emails |
| it-lite.ru | #38,292 | Bitrix, Google Analytics, Google Tag Manager + 3 more | Find emails |
| matas.dk | #38,298 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 7 more | Find emails |
| tapinto.net | #38,317 | Amazon (ACM), Amazon CloudFront, Google Analytics + 6 more | Find emails |
| iodonna.it | #38,320 | DoubleClick (Google Ads), Fastly, Google Fonts + 17 more | Find emails |
| mot.com | #38,331 | Adobe Experience Cloud (Launch), Akamai Bot Manager, Akamai Edge DNS + 3 more | Find emails |
| aapanel.org | #38,348 | Baidu Analytics, Bootstrap, Cloudflare + 15 more | Find emails |
| uokik.gov.pl | #38,360 | Apache, Bootstrap, Fancybox + 5 more | Find emails |
| sud.kz | #38,363 | Drupal, Google Analytics, Google Tag Manager + 5 more | Find emails |
| australiazoo.com.au | #38,406 | Amazon (ACM), Amazon Route 53, Google Fonts + 12 more | Find emails |
| ablesign.tv | #38,419 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 9 more | Find emails |
| transtore.app | #38,426 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 7 more | Find emails |
| ferryhopper.com | #38,429 | Amazon (ACM), Branch, Cloudflare + 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →