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 |
|---|---|---|---|
| altera.com | #52,635 | Adyen, Akamai edge/CDN, Akamai mPulse + 22 more | Find emails |
| nordot.app | #52,664 | Font Awesome, Google Analytics, Google Cloud + 9 more | Find emails |
| alldata.com | #52,677 | AddToAny, Akamai Bot Manager, Akamai Edge DNS + 13 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| twitchstats.net |
| #52,687 |
| Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 7 more |
| Find emails |
| readwritethink.org | #52,691 | AddToAny, Drupal, Fastly + 12 more | Find emails |
| crexendovip.com | #52,694 | Apache, Cloudflare, Google Identity Services + 2 more | Find emails |
| dtlr.com | #52,699 | Affirm, Bootstrap, Cloudflare + 21 more | Find emails |
| amstat.org | #52,715 | ASP.NET, Adobe Fonts (Typekit), Amazon CloudFront + 24 more | Find emails |
| amica.it | #52,730 | DoubleClick (Google Ads), Fastly, Google Fonts + 13 more | Find emails |
| nova.gr | #52,738 | Cloudflare Bot Management, Cloudflare edge/CDN, Cookiebot + 8 more | Find emails |
| webhosting.jp | #52,739 | Amazon (ACM), Amazon CloudFront, Apache + 7 more | Find emails |
| tedbaker.com | #52,743 | AdRoll, Adobe Fonts (Typekit), Amazon Route 53 + 18 more | Find emails |
| luvmehair.com | #52,748 | Cloudflare edge/CDN, GoAffPro, Judge.me + 9 more | Find emails |
| usenet-crawler.com | #52,758 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| oabsp.org.br | #52,786 | Adobe Fonts (Typekit), Adopt, Bootstrap + 17 more | Find emails |
| publicsurplus.com | #52,806 | Bootstrap, Google Analytics, Google Tag Manager + 2 more | Find emails |
| safecharge.com | #52,811 | 6sense, AWS Lambda, Cloudflare edge/CDN + 11 more | Find emails |
| nmugroup.com | #52,818 | Apache, Google Analytics, Google Site Kit + 5 more | Find emails |
| bluettipower.com | #52,842 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 5 more | Find emails |
| pokerstars.it | #52,869 | Adobe Experience Cloud (Launch), Akamai Bot Manager, Akamai edge/CDN + 17 more | Find emails |
| hentairox.com | #52,897 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 12 more | Find emails |
| gpfans.com | #52,912 | Chartbeat, Cloudflare, Cloudflare edge/CDN + 13 more | Find emails |
| lewd.ninja | #52,916 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 5 more | Find emails |
| alcoa.com | #52,926 | ASP.NET, AppsFlyer, Bootstrap + 17 more | Find emails |
| spoken-tutorial.org | #52,935 | Bootstrap, Django, Font Awesome + 8 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 →