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 |
|---|---|---|---|
| gitam.edu | #70,129 | AOS, ASP.NET, Bootstrap + 13 more | Find emails |
| screentr.com | #70,132 | GoDaddy Website Builder, GoDaddy | Find emails |
| gofan.co | #70,149 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| #70,174 |
| DataTables, Font Awesome, Google Analytics + 15 more |
| Find emails |
| zenefits.com | #70,196 | Arkose Labs, Cloudflare, Contentstack + 14 more | Find emails |
| icrush.de | #70,204 | Cloudflare, Cloudflare edge/CDN, CookieYes + 6 more | Find emails |
| mindluster.com | #70,209 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 17 more | Find emails |
| goodmanmfg.com | #70,220 | ASP.NET, Algolia, Bootstrap + 11 more | Find emails |
| gelbe-liste.de | #70,223 | ASP.NET, AT Internet, Adform + 8 more | Find emails |
| ftr.com | #70,239 | Adobe Experience Cloud (Launch), Akamai Bot Manager, Akamai Edge DNS + 22 more | Find emails |
| radioclub.ua | #70,243 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 3 more | Find emails |
| afc.cl | #70,266 | Axios, Google Fonts, Google Tag Manager + 8 more | Find emails |
| shemale6.com | #70,267 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 9 more | Find emails |
| agc.org | #70,270 | Adyen, Azure DNS, Bootstrap + 32 more | Find emails |
| paribucineverse.com | #70,282 | ASP.NET, Bootstrap, Cookiebot + 9 more | Find emails |
| hobbii.de | #70,294 | Bugsnag, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| apkadmin.com | #70,298 | Bootstrap, Cloudflare, Cloudflare Bot Management + 10 more | Find emails |
| brownhealth.org | #70,302 | Cloudflare edge/CDN, Drupal, Google Tag Manager + 7 more | Find emails |
| yasdl.com | #70,308 | Let's Encrypt, LiteSpeed | Find emails |
| wkow.com | #70,335 | Amazon Route 53, Blockthrough, Chartbeat + 7 more | Find emails |
| rbge.org.uk | #70,350 | ASP.NET, Azure API Management, Azure Front Door + 9 more | Find emails |
| unioeste.br | #70,358 | AngularJS, Bootstrap, Font Awesome + 10 more | Find emails |
| thomas-philipps.de | #70,361 | Cloudflare, Consentmanager.net, Let's Encrypt + 1 more | Find emails |
| postnl.be | #70,384 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 15 more | Find emails |
| robee.tech | #70,416 | Amazon (ACM), Amazon Route 53, Google Analytics + 10 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 →