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.
| # | 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 |
|---|---|---|---|
| iem.sh | #110,526 | Let's Encrypt, Nginx, Ruby on Rails + 1 more | Find emails |
| celebuzz.com | #110,527 | All in One SEO, Amazon Advertising, Cloudflare + 13 more | Find emails |
| filmbooster.com | #110,536 | Didomi, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| quantumfiber.com |
| #110,537 |
| Adobe Fonts (Typekit), Adyen, Brightcove + 25 more |
| Find emails |
| bionika.ru | #110,543 | Bootstrap, Drupal, Font Awesome + 3 more | Find emails |
| propertybase.com | #110,563 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services + 1 more | Find emails |
| penelopechilvers.com | #110,564 | Cloudflare, Cloudflare edge/CDN, Judge.me + 5 more | Find emails |
| soldejaneiro.com | #110,570 | AB Tasty, ClickTale (Contentsquare), Cloudflare edge/CDN + 12 more | Find emails |
| rossignol.com | #110,576 | Adobe Fonts, Adobe Fonts (Typekit), Bazaarvoice + 8 more | Find emails |
| svgator.com | #110,584 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 3 more | Find emails |
| proximus.com | #110,585 | Adobe Experience Cloud (Launch), Amazon CloudFront, Dynatrace + 9 more | Find emails |
| emblibrary.com | #110,599 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 8 more | Find emails |
| mintos.com | #110,621 | Astro, Cloudflare, Cloudflare Bot Management + 14 more | Find emails |
| romerobill.com | #110,624 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 5 more | Find emails |
| liveauctionworld.com | #110,644 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| mm-com.de | #110,647 | Apache, Bootstrap, DigiCert + 8 more | Find emails |
| supersaas.com | #110,662 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| adam.com | #110,673 | Bootstrap, DigiCert, Font Awesome + 6 more | Find emails |
| promega.com | #110,677 | ASP.NET, Azure API Management, Azure DNS + 8 more | Find emails |
| lineascan.build | #110,736 | ASP.NET, Bootstrap, Cloudflare + 10 more | Find emails |
| offtrackbetting.com | #110,738 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| eumed.net | #110,739 | Bootstrap, Chart.js, Font Awesome + 9 more | Find emails |
| learnwithhomer.com | #110,747 | Amazon Route 53, Fastly, Font Awesome + 10 more | Find emails |
| citelsoftware.com.br | #110,780 | AWS Lambda, Cloudflare edge/CDN, Google Fonts + 5 more | Find emails |
| logsis.ru | #110,784 | AOS, Bootstrap, Let's Encrypt + 13 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 →