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 |
|---|---|---|---|
| dragcave.net | #35,441 | Bluesky, Google AdSense, Google Analytics + 3 more | Find emails |
| jamestown.org | #35,442 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Analytics + 10 more | Find emails |
| seoptimer.com | #35,448 | AOS, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| houstonpress.com | #35,464 | Adobe Fonts (Typekit), Cloudflare, DoubleClick (Google Ads) + 12 more | Find emails |
| thorne.com | #35,469 | Amazon (ACM), Amazon Route 53, Apache + 9 more | Find emails |
| journalstar.com | #35,470 | Amazon Advertising, Apache, AppNexus + 31 more | Find emails |
| dditservices.com | #35,471 | Next.js, OpenResty, Sectigo + 4 more | Find emails |
| fontawesome.io | #35,529 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 6 more | Find emails |
| roedu.net | #35,534 | ASP.NET, Microsoft 365, Microsoft IIS + 3 more | Find emails |
| gonift.com | #35,547 | Amazon Route 53, Cloudflare Web Analytics, Cloudflare edge/CDN + 12 more | Find emails |
| guru.com | #35,557 | ASP.NET, Amazon Route 53, Cloudinary + 10 more | Find emails |
| growkudos.com | #35,564 | Amazon Route 53, Cloudflare edge/CDN, Envoy + 16 more | Find emails |
| ringlogix.com | #35,569 | AOS, ASP.NET, Amazon Route 53 + 21 more | Find emails |
| racgp.org.au | #35,596 | ASP.NET, Azure DNS, Bootstrap + 11 more | Find emails |
| hostinguk.net | #35,619 | Bootstrap, DigiCert, Font Awesome + 13 more | Find emails |
| fieldwire.com | #35,634 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 14 more | Find emails |
| hmdnsgroup.com | #35,647 | Font Awesome, Google Analytics, Let's Encrypt + 1 more | Find emails |
| speechpro.com | #35,648 | Bootstrap, Drupal, Slick Carousel + 6 more | Find emails |
| newshosting.com | #35,655 | Apache, Bootstrap, Cloudflare edge/CDN + 14 more | Find emails |
| ze.delivery | #35,659 | Amazon Route 53, Google Fonts, Google Maps + 5 more | Find emails |
| webnode.fr | #35,670 | Amazon Route 53, Convert, DoubleClick (Google Ads) + 7 more | Find emails |
| unilim.fr | #35,673 | AddToAny, Bootstrap, Font Awesome + 10 more | Find emails |
| hosting-mexico.net | #35,680 | AdRoll, Atlassian Statuspage, Cloudflare + 15 more | Find emails |
| vettix.org | #35,686 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 14 more | Find emails |
| boards.net | #35,694 | Envoy, Fastly, Google Cloud DNS + 4 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 →