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 |
|---|---|---|---|
| shkolazhizni.ru | #74,316 | Bootstrap, Fancybox, Font Awesome + 9 more | Find emails |
| jparkers.co.uk | #74,320 | BigCommerce, Civic Cookie Control, Cloudflare + 10 more | Find emails |
| histock.tw | #74,322 | ASP.NET, Cloudflare, Cloudflare Web Analytics + 14 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| elca.org | #74,348 | ASP.NET, AWS Lambda, Adobe Fonts (Typekit) + 11 more | Find emails |
| vecchiasignora.com | #74,351 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| auteco.com.co | #74,360 | Amazon CloudFront, Amazon Route 53, Google Tag Manager + 5 more | Find emails |
| rebag.com | #74,362 | Attentive, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| itaincontri.com | #74,368 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 11 more | Find emails |
| slazzer.com | #74,378 | Bootstrap, Cloudflare, Cloudflare Turnstile + 14 more | Find emails |
| verdecora.es | #74,382 | Cloudflare, Cloudflare edge/CDN, Doofinder + 18 more | Find emails |
| decea.mil.br | #74,392 | AddThis, Bootstrap, Font Awesome + 10 more | Find emails |
| transtv.co.id | #74,408 | Ahrefs Analytics, AnyMind Group, Cloudflare + 8 more | Find emails |
| langeek.co | #74,411 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 4 more | Find emails |
| catena.ro | #74,417 | Cloudflare Web Analytics, Fancybox, Font Awesome + 9 more | Find emails |
| siamzone.com | #74,419 | Apache, Bulma, Cloudflare + 9 more | Find emails |
| remezcla.com | #74,457 | Adobe Fonts (Typekit), Cloudflare, DoubleClick (Google Ads) + 10 more | Find emails |
| e-hoi.de | #74,462 | ASP.NET, Bootstrap, Cloudinary + 7 more | Find emails |
| scrabble-solver.com | #74,466 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| diyadinnet.com | #74,490 | Apache, Bootstrap, DoubleClick (Google Ads) + 13 more | Find emails |
| noip.me | #74,516 | DigiCert, FirstPromoter, Google Fonts + 6 more | Find emails |
| accountable2you.com | #74,517 | AOS, ASP.NET, Adobe Fonts (Typekit) + 18 more | Find emails |
| vidaecor.com.br | #74,550 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| firstinmath.com | #74,569 | ASP.NET, AWS Lambda, Axios + 17 more | Find emails |
| polywood.com | #74,579 | Adobe Fonts, Adobe Fonts (Typekit), Amazon Route 53 + 10 more | Find emails |
| midas-network.com | #74,591 | ASP.NET, Bootstrap, Cloudflare + 9 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 →