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 |
|---|---|---|---|
| fuaark.com | #89,968 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 6 more | Find emails |
| mf-master.ru | #89,974 | Font Awesome, Foundation, Google Fonts + 10 more | Find emails |
| pm-tricks.com | #89,978 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 21 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| nordkapp.net | #89,983 | Apache, Bootstrap, CookieYes + 8 more | Find emails |
| bercut.com | #89,990 | Fancybox, Mail.ru Analytics (Top100), PHP + 5 more | Find emails |
| nt.nl | #89,991 | All in One SEO, Cloudflare, Cloudflare Web Analytics + 16 more | Find emails |
| myprofitland.com | #89,992 | Chart.js, Cloudflare, Cloudflare Web Analytics + 8 more | Find emails |
| realting.com | #89,993 | Bootstrap, DoubleClick (Google Ads), Google Fonts + 12 more | Find emails |
| eyewearlabs.com | #89,999 | Cloudflare edge/CDN, Google Trust Services, Shopflo + 4 more | Find emails |
| adoc.pub | #90,010 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 9 more | Find emails |
| maths.co.uk | #90,016 | ASP.NET, Google Analytics, Microsoft IIS + 4 more | Find emails |
| fye.com | #90,029 | Cloudflare edge/CDN, Klaviyo, Let's Encrypt + 5 more | Find emails |
| fastlnk.ru | #90,032 | Google Analytics, Google Tag Manager, Gravatar + 8 more | Find emails |
| t1x2.net | #90,034 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 12 more | Find emails |
| springboard.com | #90,056 | Cloudflare, Cloudflare edge/CDN, Express + 6 more | Find emails |
| sportengland.org | #90,063 | Bluesky, Cloudflare, Cloudflare Turnstile + 13 more | Find emails |
| apo.org.au | #90,064 | AddToAny, Cloudflare, Cloudflare Web Analytics + 11 more | Find emails |
| eliteperfumes.cl | #90,073 | Cloudflare, Cloudflare edge/CDN, Let's Encrypt + 4 more | Find emails |
| cleetusmcfarland.com | #90,080 | Cloudflare, Cloudflare edge/CDN, Let's Encrypt + 4 more | Find emails |
| ettnet.se | #90,088 | Cloudflare Bot Management, Cloudflare edge/CDN, Elementor + 15 more | Find emails |
| lightningbase.com | #90,094 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 11 more | Find emails |
| host.md | #90,109 | Bootstrap, Font Awesome, Google Analytics + 9 more | Find emails |
| cede.ch | #90,142 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 3 more | Find emails |
| dlb.lk | #90,164 | Apache, Bootstrap, Google Analytics + 6 more | Find emails |
| bitcoearn.com | #90,204 | Bootstrap, Cloudflare, Cloudflare Turnstile + 16 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 →