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 |
|---|---|---|---|
| zolasuite.com | #123,265 | ASP.NET, Amazon Route 53, Cloudflare Bot Management + 14 more | Find emails |
| avia.pro | #123,303 | 24smi.net, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| spets.ru | #123,307 | Bitrix, Bootstrap, Fancybox + 8 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| premierhealth.com |
| #123,317 |
| Azure API Management, Azure Front Door, Bootstrap + 9 more |
| Find emails |
| prepr.io | #123,326 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 13 more | Find emails |
| vdc.ru | #123,395 | All in One SEO, Bootstrap, Google Fonts + 11 more | Find emails |
| e-mind.com | #123,426 | Apache, Bootstrap, CookieYes + 9 more | Find emails |
| 295.ca | #123,441 | Let's Encrypt, Nginx, PHP + 2 more | Find emails |
| miniorange.com | #123,444 | Amazon (ACM), Apache, Bootstrap + 10 more | Find emails |
| ebola.cz | #123,471 | Cookiebot, Google Fonts, HTMX + 6 more | Find emails |
| realitykings.com | #123,484 | Amazon Route 53, DigiCert, Google Fonts + 3 more | Find emails |
| t-firefly.com | #123,485 | Cloudflare edge/CDN, GSAP, Let's Encrypt + 3 more | Find emails |
| silkengirl.com | #123,500 | Google Analytics, Google Fonts, Google Hosted Libraries + 6 more | Find emails |
| zen.one | #123,512 | ASP.NET, Azure API Management, Cloudflare + 8 more | Find emails |
| rasamalaysia.com | #123,524 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 8 more | Find emails |
| frsport.com | #123,533 | Cloudflare, Cloudflare edge/CDN, Let's Encrypt + 5 more | Find emails |
| timesargus.com | #123,538 | Amazon Advertising, DoubleClick (Google Ads), Font Awesome + 13 more | Find emails |
| omnicell.com | #123,551 | ASP.NET, Azure API Management, Bizible + 11 more | Find emails |
| vitabiotics.com | #123,563 | AngularJS, BidSwitch, Cloudflare + 18 more | Find emails |
| connecto.io | #123,574 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| sketch.io | #123,597 | Cloudflare, Cloudflare edge/CDN, Divi + 10 more | Find emails |
| park.io | #123,610 | Amazon (ACM), Amazon Route 53, Bootstrap + 9 more | Find emails |
| japan-figure.com | #123,613 | Cloudflare, Cloudflare edge/CDN, Google Maps + 7 more | Find emails |
| easyspirit.com | #123,614 | Cloudflare edge/CDN, ConsentMo, CrazyEgg + 8 more | Find emails |
| fusionmovies.to | #123,640 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 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 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →