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 |
|---|---|---|---|
| acsm.org | #31,205 | Adobe Fonts (Typekit), Bootstrap, Cloudflare Bot Management + 14 more | Find emails |
| minute-ly.com | #31,221 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 10 more | Find emails |
| pairnic.com | #31,252 | Bootstrap, Feedburner, Font Awesome + 7 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| yani.tv | #31,264 | Cloudflare, Font Awesome, Google Hosted Libraries + 10 more | Find emails |
| sharp-stream.com | #31,281 | AWS Lambda, Amazon CloudFront, Amazon Route 53 + 17 more | Find emails |
| top500.org | #31,290 | Apache, Bootstrap, Chart.js + 11 more | Find emails |
| canadahelps.org | #31,318 | Azure DNS, Fastly, Font Awesome + 13 more | Find emails |
| dbpia.co.kr | #31,376 | Ahrefs Analytics, Amazon (ACM), Amazon Route 53 + 16 more | Find emails |
| last-z.com | #31,390 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 4 more | Find emails |
| bibliatodo.com | #31,400 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 12 more | Find emails |
| mariowiki.com | #31,409 | Amazon Advertising, Blockthrough, Bluesky + 7 more | Find emails |
| toledoblade.com | #31,432 | All in One SEO, Empower Local, Font Awesome + 14 more | Find emails |
| maxdominios.com | #31,487 | AOS, Apache, Bootstrap + 12 more | Find emails |
| prb.org | #31,517 | Amazon Route 53, Foundation, Google Fonts + 6 more | Find emails |
| lynxoft.ru | #31,534 | Bitrix, Google Hosted Libraries, Let's Encrypt + 5 more | Find emails |
| georgjensen.com | #31,540 | AOS, Adobe Fonts (Typekit), Cloudflare edge/CDN + 15 more | Find emails |
| plaud.ai | #31,541 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 6 more | Find emails |
| ecosense.io | #31,551 | Ahrefs Analytics, Cloudflare, Cloudflare edge/CDN + 10 more | Find emails |
| maxma.com | #31,557 | Bootstrap, Cloudflare, Fastly + 16 more | Find emails |
| profesionalhosting.com | #31,578 | AOS, Amazon CloudFront, Bootstrap + 22 more | Find emails |
| dibiz.com | #31,614 | Bootstrap, Font Awesome, Google Analytics + 10 more | Find emails |
| chairish.com | #31,656 | Adobe Fonts (Typekit), Amazon Route 53, Fastly + 9 more | Find emails |
| iqos.com | #31,659 | Adform, Akamai Bot Manager, Akamai edge/CDN + 27 more | Find emails |
| hopper.com | #31,665 | DataDome, Envoy, Google Cloud DNS + 5 more | Find emails |
| wtvr.com | #31,669 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 14 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 →