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 |
|---|---|---|---|
| shesfreaky.com | #19,982 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| k5learning.com | #20,005 | Bootstrap, Drupal, Fastly + 12 more | Find emails |
| issn.org | #20,009 | Apache, Fancybox, Font Awesome + 6 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| zyngapoker.com |
| #20,017 |
| Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more |
| Find emails |
| my1.ru | #20,101 | Bootstrap, CleanTalk, Font Awesome + 8 more | Find emails |
| doppler.com | #20,113 | Bugsnag, Cloudflare, Cloudflare Web Analytics + 11 more | Find emails |
| otdelit.ru | #20,124 | Bitrix, Google Fonts, Let's Encrypt + 5 more | Find emails |
| ncronline.org | #20,141 | Bluesky, Cloudflare, Cloudflare Web Analytics + 13 more | Find emails |
| alpaca.markets | #20,153 | Amazon CloudFront, Amplitude, Atlassian Cloud + 32 more | Find emails |
| gymshark.com | #20,155 | Amazon Route 53, Bazaarvoice, Cloudflare edge/CDN + 5 more | Find emails |
| mawdoo3.com | #20,159 | Cloudflare, Cloudflare edge/CDN, Fastly + 4 more | Find emails |
| galottery.com | #20,161 | Apache, Fastly, Font Awesome + 9 more | Find emails |
| trustedsite.com | #20,167 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 26 more | Find emails |
| joyclub.com | #20,179 | Amazon Route 53, AppsFlyer, Cloudflare Bot Management + 4 more | Find emails |
| tokmanni.fi | #20,180 | Adform, Azure DNS, Google Tag Manager + 6 more | Find emails |
| newswise.com | #20,190 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 17 more | Find emails |
| botfaqtor.ru | #20,191 | Bootstrap, BotFAQtor, Font Awesome + 16 more | Find emails |
| waltonbd.com | #20,199 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 13 more | Find emails |
| vg247.com | #20,240 | Amazon Advertising, Bluesky, Chartbeat + 11 more | Find emails |
| wisepops.com | #20,259 | Astro, Cloudflare, Cloudflare edge/CDN + 11 more | Find emails |
| cardtrader.com | #20,286 | Cloudflare, Cloudflare edge/CDN, Cookie-Script + 5 more | Find emails |
| animeunity.so | #20,318 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 10 more | Find emails |
| rikunabi.com | #20,330 | Adyen, Amazon (ACM), Amazon CloudFront + 17 more | Find emails |
| nixys.ru | #20,369 | Bootstrap, Font Awesome, Google Analytics + 15 more | Find emails |
| brilliant.tech | #20,379 | Amazon Route 53, Cloudflare edge/CDN, Google Tag Manager + 9 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 →