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 |
|---|---|---|---|
| pacermonitor.com | #51,390 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| spaceweatherlive.com | #51,401 | Bluesky, Bootstrap, Cloudflare + 9 more | Find emails |
| healthsherpa.com | #51,403 | Amazon CloudFront, Axios, ConsentMo + 15 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| swan.sk | #51,414 | Adobe Fonts (Typekit), DigiCert, Django + 8 more | Find emails |
| mofa.gov.pk | #51,435 | AOS, Apache, Bootstrap + 7 more | Find emails |
| babyboofashion.com | #51,437 | Cloudflare edge/CDN, Gorgias, Klaviyo + 14 more | Find emails |
| woodcraft.com | #51,446 | Adobe Fonts (Typekit), Azure DNS, Cloudflare edge/CDN + 7 more | Find emails |
| servsafe.com | #51,447 | ASP.NET, Bootstrap, Font Awesome + 9 more | Find emails |
| thenewslens.com | #51,461 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 10 more | Find emails |
| armbian.com | #51,462 | Ghost, Google Analytics, Google Fonts + 9 more | Find emails |
| awaze.com | #51,498 | AOS, Amazon Route 53, Fancybox + 12 more | Find emails |
| amplimed.com.br | #51,506 | Apache, Cloudflare, Google Analytics + 9 more | Find emails |
| ygoprodeck.com | #51,509 | Blockthrough, Bluesky, Bootstrap + 15 more | Find emails |
| bpost.be | #51,519 | Amazon CloudFront, Bootstrap, Drupal + 7 more | Find emails |
| karafun.com | #51,532 | Amazon Route 53, Fastly, Google Fonts + 9 more | Find emails |
| kusuguru.co.jp | #51,533 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 13 more | Find emails |
| bachaaparty.com | #51,621 | AdRoll, Cloudflare, Cloudflare edge/CDN + 10 more | Find emails |
| uvsgames.com | #51,625 | Adobe Fonts (Typekit), Amazon Route 53, Cloudflare Bot Management + 21 more | Find emails |
| concertarchives.org | #51,633 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 9 more | Find emails |
| ezadlive.com | #51,638 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 3 more | Find emails |
| ridge.com | #51,639 | Adobe Fonts (Typekit), Affirm, Cloudflare + 9 more | Find emails |
| getfliff.com | #51,643 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 6 more | Find emails |
| planetspark.in | #51,649 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 14 more | Find emails |
| cookunity.com | #51,679 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| dealersync.com | #51,682 | ASP.NET, DigiCert, Google Analytics + 5 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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →