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 |
|---|---|---|---|
| paho.org | #5,599 | Bootstrap, DigiCert, Drupal + 10 more | Find emails |
| sgnic.sg | #5,601 | ASP.NET, AddThis, AngularJS + 10 more | Find emails |
| vietnamnet.vn | #5,625 | Google AdSense, Google Analytics, Google Fonts + 4 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| ravelry.com |
| #5,632 |
| Atlassian Statuspage, Nginx, Ruby on Rails + 2 more |
| Find emails |
| yaplakal.com | #5,659 | Cloudflare, Cloudflare Turnstile, Cloudflare edge/CDN + 7 more | Find emails |
| net-line.pro | #5,662 | Bitrix, Font Awesome, GSAP + 6 more | Find emails |
| tv2.no | #5,707 | Adnami, Akamai edge/CDN, Akamai mPulse + 12 more | Find emails |
| guinnessworldrecords.com | #5,708 | Adyen, Amazon (ACM), Amazon CloudFront + 19 more | Find emails |
| telenet.be | #5,711 | Adobe Advertising Cloud, Adobe Audience Manager, Adobe Experience Cloud (Launch) + 8 more | Find emails |
| tribunnews.com | #5,792 | AWS WAF, Amazon (ACM), Amazon CloudFront + 15 more | Find emails |
| gamer.com.tw | #5,794 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 10 more | Find emails |
| qiita.com | #5,810 | Adingo, Amazon (ACM), Amazon CloudFront + 19 more | Find emails |
| sonnenbatterie.de | #5,814 | AWS Lambda, Cloudflare edge/CDN, Google Tag Manager + 7 more | Find emails |
| flippingbook.com | #5,818 | ASP.NET, Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| clinch.co | #5,848 | AWS Lambda, Amazon CloudFront, Amazon Route 53 + 15 more | Find emails |
| inaturalist.org | #5,869 | Bluesky, Cloudflare Bot Management, Cloudflare Turnstile + 10 more | Find emails |
| gpo.gov | #5,917 | ASP.NET, Azure Front Door, Bootstrap + 13 more | Find emails |
| mixi.jp | #5,942 | Amazon Route 53, Apache, Google AdSense + 5 more | Find emails |
| loggly.com | #5,959 | Adobe Experience Cloud (Launch), Amazon CloudFront, Amazon Route 53 + 20 more | Find emails |
| adme.media | #6,018 | Amazon Advertising, Amazon Route 53, DoubleClick (Google Ads) + 8 more | Find emails |
| ngs.ru | #6,031 | DDoS-Guard, Let's Encrypt | Find emails |
| miami.edu | #6,049 | Akamai Edge DNS, Amazon CloudFront, Apache + 11 more | Find emails |
| fourseasons.com | #6,106 | Akamai Bot Manager, Akamai edge/CDN, Akamai mPulse + 7 more | Find emails |
| fontanka.ru | #6,113 | DDoS-Guard, Let's Encrypt | Find emails |
| formstack.com | #6,119 | AWS Lambda, Adobe Fonts (Typekit), Amazon (ACM) + 20 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 →