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 |
|---|---|---|---|
| estranky.cz | #21,161 | Adobe Experience Cloud (Launch), Bootstrap, DigiCert + 15 more | Find emails |
| standardmedia.co.ke | #21,181 | Amazon Advertising, Bootstrap, Cloudflare + 19 more | Find emails |
| mts.by | #21,227 | Bitrix, Bootstrap, Font Awesome + 6 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| ucas.com | #21,249 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 8 more | Find emails |
| federatedjournals.com | #21,257 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| libking.ru | #21,260 | Google AdSense, Nginx, PHP + 1 more | Find emails |
| indiaresults.com | #21,286 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| worthpoint.com | #21,304 | Amazon Route 53, Apache, Google Fonts + 2 more | Find emails |
| giva.co | #21,306 | Cloudflare, Cloudflare edge/CDN, Convert + 8 more | Find emails |
| firefaucet.win | #21,338 | AOS, Cloudflare, Cloudflare Turnstile + 14 more | Find emails |
| click2cart.com | #21,357 | Amazon CloudFront, Amazon Route 53, Bootstrap + 9 more | Find emails |
| webd.pl | #21,358 | Bootstrap, Cookiebot, Disqus + 10 more | Find emails |
| timewall.io | #21,371 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 11 more | Find emails |
| siteground.asia | #21,391 | Cookiebot, Google Trust Services, Nginx + 5 more | Find emails |
| you-porn.com | #21,397 | Amazon Route 53, DebugBear, DoubleClick (Google Ads) + 5 more | Find emails |
| wku.edu | #21,398 | Apache, Bootstrap, Font Awesome + 9 more | Find emails |
| webpushr.com | #21,423 | Amazon Route 53, Apache, Google Ads Conversion + 8 more | Find emails |
| codeblackbelt.com | #21,444 | Cloudflare, Cloudflare edge/CDN, Google Ads Conversion + 8 more | Find emails |
| richmond.com | #21,451 | 33Across, Advertising.com, Amazon Advertising + 44 more | Find emails |
| innogames.de | #21,455 | Apache, ConsentMo, Fastly + 4 more | Find emails |
| ukrnames.com | #21,517 | Bootstrap, DataTables, Fancybox + 9 more | Find emails |
| bizzabo.com | #21,542 | AOS, BugHerd, ClickTale (Contentsquare) + 22 more | Find emails |
| architizer.com | #21,548 | Cloudflare Bot Management, Cloudflare Turnstile, Cloudflare edge/CDN + 19 more | Find emails |
| pepstores.com | #21,586 | Cloudflare, Cloudflare edge/CDN, Cookie-Script + 9 more | Find emails |
| adultgamesworld.com | #21,596 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 6 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 →