CAPTCHA & Bot Protection
90,376 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9%). 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 |
|---|---|---|---|
| problogger.com | #34,503 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 14 more | Find emails |
| vuoriclothing.com | #34,510 | Adobe Fonts, Adobe Fonts (Typekit), Let's Encrypt + 5 more | Find emails |
| books2read.com | #34,517 | Backbone.js, Cloudflare, Cloudflare Web Analytics + 12 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| supremocontrol.com | #34,552 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| myteamspeak.com | #34,568 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 7 more | Find emails |
| hotcars.com | #34,574 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| kraftheinz.com | #34,584 | Adobe Fonts, Adobe Fonts (Typekit), Cloudinary + 7 more | Find emails |
| gamedev.net | #34,586 | Ahrefs Analytics, Cloudflare, Cloudflare Bot Management + 15 more | Find emails |
| ascendoor.com | #34,614 | All in One SEO, Google Analytics, Google Tag Manager + 8 more | Find emails |
| iberdrola.es | #34,621 | Akamai Bot Manager, Akamai edge/CDN, Akamai mPulse + 13 more | Find emails |
| mab.co.id | #34,628 | Adobe Fonts (Typekit), Alibaba Cloud DNS, Envoy + 7 more | Find emails |
| flashforge.com | #34,630 | Alibaba Cloud DNS, Cloudflare edge/CDN, Fancybox + 10 more | Find emails |
| wma.net | #34,635 | Bluesky, HubSpot, Let's Encrypt + 6 more | Find emails |
| chemistryworld.com | #34,642 | ASP.NET, Amazon (ACM), Amazon CloudFront + 14 more | Find emails |
| hypeddit.com | #34,650 | Amazon (ACM), Amazon Route 53, Amplitude + 22 more | Find emails |
| robly.com | #34,664 | Amazon (ACM), Amazon Route 53, Bootstrap + 21 more | Find emails |
| sussexexpress.co.uk | #34,679 | Cloudflare Bot Management, Cloudflare edge/CDN, DoubleClick (Google Ads) + 9 more | Find emails |
| lta.gov.sg | #34,689 | Adobe Experience Cloud (Launch), Akamai Edge DNS, Akamai edge/CDN + 10 more | Find emails |
| aldoshoes.com | #34,693 | Amazon Route 53, Bloomreach, Cloudflare edge/CDN + 7 more | Find emails |
| fit.edu | #34,701 | Amazon (ACM), Amazon CloudFront, BugHerd + 14 more | Find emails |
| bkdns.vn | #34,714 | Bootstrap, DigiCert, Font Awesome + 3 more | Find emails |
| lta.org.uk | #34,721 | Adobe Fonts (Typekit), Azure API Management, Azure DNS + 6 more | Find emails |
| netto-online.de | #34,731 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 10 more | Find emails |
| 2captcha.com | #34,746 | Arkose Labs, Cloudflare, Cloudflare edge/CDN + 2 more | Find emails |
| eddiebauer.com | #34,757 | Cloudflare edge/CDN, Google Tag Manager, Gorgias + 11 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →