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 |
|---|---|---|---|
| shopinchicago.com | #109,291 | ASP.NET, Google AdSense, Google Analytics + 1 more | Find emails |
| infonu.nl | #109,310 | Consentmanager.net, Fastmail, Google Analytics + 5 more | Find emails |
| feig-partner.de | #109,321 | Adobe Fonts (Typekit), Amazon Route 53, Apache + 7 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| optiontradingspeak.com | #109,323 | All in One SEO, Apache, DoubleClick (Google Ads) + 10 more | Find emails |
| ufibox.com | #109,334 | Cloudflare, Cloudflare edge/CDN, Let's Encrypt + 4 more | Find emails |
| clubcent.com | #109,349 | ASP.NET, Adobe Fonts (Typekit), Cloudflare edge/CDN + 10 more | Find emails |
| cbdfx.com | #109,350 | Cloudflare edge/CDN, Google Fonts, Judge.me + 6 more | Find emails |
| beurer.com | #109,372 | Azure DNS, Cloudflare edge/CDN, Google Analytics + 13 more | Find emails |
| kathimerini.com.cy | #109,373 | Bootstrap, Fancybox, Google Fonts + 11 more | Find emails |
| plainsite.org | #109,375 | Apache, Font Awesome, Google Analytics + 6 more | Find emails |
| ironhidegames.com | #109,378 | ASP.NET, Azure API Management, Bootstrap + 9 more | Find emails |
| selectblinds.com | #109,381 | Cloudflare, Cloudflare edge/CDN, Datadog + 8 more | Find emails |
| miradore.com | #109,404 | ASP.NET, Azure DNS, Azure Front Door + 10 more | Find emails |
| harem-battle.club | #109,415 | Cloudflare, Google Analytics, Google Fonts + 5 more | Find emails |
| balmain.com | #109,435 | Cloudflare edge/CDN, Global-e, Shopify + 2 more | Find emails |
| theurbanlist.com | #109,441 | Adobe Fonts (Typekit), Cloudflare, Cloudflare Web Analytics + 12 more | Find emails |
| yooco.de | #109,444 | Cloudflare, Cloudflare Bot Management, Cloudflare Turnstile + 5 more | Find emails |
| gitguardian.com | #109,464 | AWS Lambda, Cloudflare, Cloudflare edge/CDN + 11 more | Find emails |
| webeden.co.uk | #109,493 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 11 more | Find emails |
| orson.io | #109,494 | Google Ads Conversion, Google Analytics, Google Fonts + 11 more | Find emails |
| buypass.no | #109,510 | Google Tag Manager, HubSpot, Matomo + 6 more | Find emails |
| ticketportal.cz | #109,512 | ASP.NET, Bootstrap, Cloudflare + 7 more | Find emails |
| visn.co.uk | #109,515 | Apache, Font Awesome, Let's Encrypt + 2 more | Find emails |
| aboutnet.gr | #109,525 | Bootstrap, Flying Press, Font Awesome + 9 more | Find emails |
| tigera.io | #109,531 | Adyen, Algolia, Brightcove + 28 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 →