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 |
|---|---|---|---|
| americanprogress.org | #11,279 | Adobe Fonts (Typekit), Amazon Route 53, Cloudflare edge/CDN + 11 more | Find emails |
| mobilevikings.be | #11,297 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| snap.com | #11,310 | Amazon Route 53, Contentful, DoubleClick (Google Ads) + 17 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| azlyrics.com | #11,315 | Bootstrap, Namecheap, Nginx + 4 more | Find emails |
| omni-dex.io | #11,318 | AWS Lambda, Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| mova-tech.com | #11,324 | Alibaba Cloud DNS, Cloudflare edge/CDN, Google Ads Conversion + 9 more | Find emails |
| gkg.net | #11,348 | Font Awesome, Google Analytics, Google Fonts + 5 more | Find emails |
| dualeotruyendb.com | #11,359 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 10 more | Find emails |
| pubnation.com | #11,404 | Cloudflare Bot Management, Cloudflare edge/CDN, Consentmanager.net + 11 more | Find emails |
| olxlay.com | #11,440 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 15 more | Find emails |
| olxsun.com | #11,442 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 15 more | Find emails |
| psychiatry.org | #11,460 | ASP.NET, Cloudflare, Cloudflare Bot Management + 14 more | Find emails |
| trafficstars.com | #11,461 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 5 more | Find emails |
| zeffy.com | #11,472 | AWS Lambda, Amazon Advertising, Amplitude + 38 more | Find emails |
| yospace.com | #11,481 | AWS Lambda, Cloudflare edge/CDN, Google Analytics + 11 more | Find emails |
| linux.org | #11,488 | Ahrefs Analytics, Cloudflare, Cloudflare Web Analytics + 8 more | Find emails |
| computerweekly.com | #11,508 | Chartbeat, Cloudflare edge/CDN, DoubleClick (Google Ads) + 6 more | Find emails |
| myfonts.com | #11,525 | Adobe Experience Cloud (Launch), Cloudflare, Cloudflare Bot Management + 10 more | Find emails |
| texastribune.org | #11,528 | Cloudflare, DoubleClick (Google Ads), Google Analytics + 11 more | Find emails |
| olark.com | #11,535 | Cloudflare edge/CDN, ConsentMo, Google Cloud DNS + 7 more | Find emails |
| voipbuster.com | #11,584 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| vietjetair.com | #11,589 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| adventori.com | #11,599 | AOS, Cloudflare Bot Management, Cloudflare edge/CDN + 8 more | Find emails |
| a8.net | #11,626 | A8.net, Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| chipotle.com | #11,630 | Adobe Experience Cloud (Launch), Amazon Route 53, Bootstrap + 18 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 →