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 |
|---|---|---|---|
| vresp.com | #48,962 | Bootstrap, Cloudflare, Cloudflare Bot Management + 14 more | Find emails |
| cintas.com | #48,970 | Adobe Fonts (Typekit), Azure API Management, Bootstrap + 12 more | Find emails |
| penguin.com.au | #48,984 | Amazon Route 53, Azure API Management, Azure Front Door + 11 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| sacurrent.com | #48,994 | Bluesky, Cloudflare, Google Analytics + 11 more | Find emails |
| kroton.com.br | #49,002 | AOS, Azure DNS, Cookie-Script + 9 more | Find emails |
| ugu.pl | #49,006 | Django, Google AdSense, Google Analytics + 5 more | Find emails |
| 1muslimapp.com | #49,019 | ASP.NET, Cloudflare, Cloudflare Web Analytics + 4 more | Find emails |
| vfw.org | #49,032 | ASP.NET, Bootstrap, Google Ads Conversion + 7 more | Find emails |
| indiedb.com | #49,045 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 5 more | Find emails |
| uep24.ru | #49,049 | Bootstrap, Font Awesome, Google Fonts + 7 more | Find emails |
| minneapolisfed.org | #49,083 | Akamai Bot Manager, Akamai edge/CDN, Google Tag Manager + 7 more | Find emails |
| classicfirearms.com | #49,105 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
| moviemaker.com | #49,142 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 5 more | Find emails |
| zupyak.com | #49,177 | Cloudflare, Cloudflare edge/CDN, Google AdSense + 6 more | Find emails |
| xyzscripts.com | #49,196 | AOS, Bootstrap, Cloudflare + 14 more | Find emails |
| ala.org.au | #49,238 | Amazon Route 53, Bootstrap, Cloudflare edge/CDN + 12 more | Find emails |
| qbt.com.au | #49,243 | Apache, Bootstrap, Cloudflare + 6 more | Find emails |
| atlantico.fr | #49,278 | Cloudflare, Cloudflare edge/CDN, Didomi + 8 more | Find emails |
| powerlineblog.com | #49,303 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 19 more | Find emails |
| yuja.com | #49,345 | Amazon Route 53, BambooHR, Bluesky + 17 more | Find emails |
| leaseweb.nl | #49,350 | Express, Fastly, Font Awesome + 4 more | Find emails |
| impericon.com | #49,371 | BrightEdge, Cloudflare, Cloudflare edge/CDN + 10 more | Find emails |
| arcamax.com | #49,377 | Amazon Advertising, Amazon Route 53, Disqus + 13 more | Find emails |
| itaka.pl | #49,383 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 4 more | Find emails |
| currencyconvert.online | #49,415 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 5 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 →