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 |
|---|---|---|---|
| dovendi.com | #13,059 | Google Analytics, Google Tag Manager, Let's Encrypt + 1 more | Find emails |
| fasthosts.co.uk | #13,068 | ASP.NET, Apache, Astro + 4 more | Find emails |
| ynetnews.com | #13,117 | Akamai Edge DNS, Chartbeat, Cloudflare edge/CDN + 10 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| nanosystems.com | #13,170 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| techdirt.com | #13,184 | Cloudflare, Cloudflare Bot Management, Cloudflare Web Analytics + 11 more | Find emails |
| zahid.host | #13,210 | Django, Google Analytics, Google Tag Manager + 5 more | Find emails |
| regulations.gov | #13,211 | Amazon CloudFront, DigiCert, Nginx + 2 more | Find emails |
| fluidplayer.com | #13,229 | Bootstrap, Cloudflare edge/CDN, Font Awesome + 10 more | Find emails |
| zoomgov.com | #13,239 | Amazon Route 53, Bootstrap, Cloudflare Bot Management + 7 more | Find emails |
| nic.lv | #13,266 | Let's Encrypt, reCAPTCHA v2 | Find emails |
| rumahweb.com | #13,269 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 9 more | Find emails |
| aeaweb.org | #13,310 | Adobe Fonts (Typekit), Apache, Bluesky + 8 more | Find emails |
| tlauncher.org | #13,314 | Cloudflare, DDoS-Guard, PHP + 2 more | Find emails |
| wrike.com | #13,362 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 2 more | Find emails |
| rrpicturearchives.net | #13,380 | ASP.NET, Bootstrap, DataTables + 10 more | Find emails |
| pushy.me | #13,403 | Amazon (ACM), Amazon Route 53, Bootstrap + 12 more | Find emails |
| premiumtimesng.com | #13,406 | AddThis, Cloudflare, Cloudflare edge/CDN + 6 more | Find emails |
| airdroid.com | #13,411 | Amazon Route 53, Google Analytics, Google Fonts + 6 more | Find emails |
| dandb.com | #13,413 | Akamai mPulse, Amazon Route 53, Cloudflare Bot Management + 12 more | Find emails |
| unesp.br | #13,421 | Apache, Bootstrap, DataTables + 16 more | Find emails |
| topwar.ru | #13,432 | Cloudflare, DDoS-Guard, DataLife Engine + 7 more | Find emails |
| languagetool.org | #13,440 | Amplitude, Apple Pay, Awin + 18 more | Find emails |
| cloudmark.com | #13,495 | Drupal, Google Analytics, Google Tag Manager + 5 more | Find emails |
| tranny.one | #13,507 | Cloudflare Bot Management, Cloudflare Turnstile, Cloudflare edge/CDN + 6 more | Find emails |
| nd.gov | #13,510 | ConsentMo, Drupal, Microsoft 365 + 4 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 →