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 |
|---|---|---|---|
| snapfish.com | #12,286 | Adobe Experience Cloud (Launch), Akamai edge/CDN, Akamai mPulse + 12 more | Find emails |
| lung.org | #12,294 | ASP.NET, Azure API Management, Cloudflare + 8 more | Find emails |
| disa.mil | #12,331 | Adyen, Brightcove, DoubleClick (Google Ads) + 11 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| untappd.com |
| #12,340 |
| Cloudflare, Cloudflare edge/CDN, Google Fonts + 7 more |
| Find emails |
| bahnhof.net | #12,351 | Apache, Font Awesome, Sectigo + 3 more | Find emails |
| mynewsdesk.com | #12,381 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 11 more | Find emails |
| fextralife.com | #12,384 | Bunny CDN, BunnyCDN, Google Analytics + 5 more | Find emails |
| popcash.net | #12,385 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 17 more | Find emails |
| carnegieendowment.org | #12,434 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
| whc.ca | #12,439 | Bootstrap, ClickCease, Cloudflare + 22 more | Find emails |
| bid.cars | #12,442 | Bootstrap, Cloudflare, Cloudflare Bot Management + 11 more | Find emails |
| writeablog.net | #12,448 | AngularJS, Bootstrap, Cloudflare + 10 more | Find emails |
| altium.com | #12,486 | AddToAny, Amazon (ACM), Amazon CloudFront + 34 more | Find emails |
| ice.gov | #12,512 | Apache, Bootstrap, Cloudflare + 8 more | Find emails |
| webnode.page | #12,524 | Amazon Route 53, Convert, DoubleClick (Google Ads) + 6 more | Find emails |
| androidpolice.com | #12,549 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| smartcallback.ru | #12,579 | Bootstrap, Fancybox, Font Awesome + 10 more | Find emails |
| equalweb.com | #12,636 | Bootstrap, ClickCease, Cloudflare + 6 more | Find emails |
| scimagojr.com | #12,640 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 3 more | Find emails |
| hearstnetworks.com | #12,664 | Bootstrap, Cloudflare, Drupal + 11 more | Find emails |
| volusion.com | #12,692 | Amazon CloudFront, Atlassian Cloud, Atlassian Statuspage + 24 more | Find emails |
| idexx.com | #12,728 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 23 more | Find emails |
| limetorrents.fun | #12,732 | Cloudflare, Cloudflare Turnstile, Cloudflare Web Analytics + 7 more | Find emails |
| xmission.com | #12,746 | Bluesky, Bootstrap, DigiCert + 11 more | Find emails |
| aweber.com | #12,753 | Amazon CloudFront, Atlassian Statuspage, Cloudflare + 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-2026-08-25-full-v2), snapshot August 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →