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 |
|---|---|---|---|
| expedient.com | #42,838 | 6sense, Bootstrap, Chart.js + 14 more | Find emails |
| krautmtrk.com | #42,873 | GoDaddy Website Builder, GoDaddy | Find emails |
| usc.gal | #42,919 | Apache, Drupal, Google Analytics + 6 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| #42,962 |
| Amplience, Cloudflare edge/CDN, Cookie Information + 7 more |
| Find emails |
| game.es | #42,968 | ASP.NET, ConsentMo, Cookiebot + 6 more | Find emails |
| mathnasium.com | #42,972 | Cloudflare, Cloudflare edge/CDN, Google Maps + 10 more | Find emails |
| videosift.com | #43,011 | Let's Encrypt, Nginx, reCAPTCHA v2 | Find emails |
| paxhistoria.co | #43,045 | Cloudflare, Let's Encrypt, Next.js + 4 more | Find emails |
| hongkongfp.com | #43,046 | Cloudflare, DoubleClick (Google Ads), Google Analytics + 11 more | Find emails |
| purexbox.com | #43,049 | Amazon Advertising, Bluesky, Cloudflare + 13 more | Find emails |
| glossier.com | #43,057 | Cloudflare, Cloudflare edge/CDN, Global-e + 11 more | Find emails |
| chime.me | #43,080 | Amazon Route 53, ChatGPT Ads Pixel, Cloudflare Bot Management + 12 more | Find emails |
| centralesupelec.fr | #43,083 | Bluesky, Drupal, Font Awesome + 5 more | Find emails |
| orlandoweekly.com | #43,087 | Bluesky, Cloudflare, Google Analytics + 11 more | Find emails |
| fucker.com | #43,126 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 8 more | Find emails |
| weatheronline.co.uk | #43,139 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 9 more | Find emails |
| jadedldn.com | #43,162 | Attentive, Cloudflare edge/CDN, Global-e + 11 more | Find emails |
| londonist.com | #43,178 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 6 more | Find emails |
| zingplay.com | #43,206 | DigiCert, Google Analytics, Google Tag Manager + 5 more | Find emails |
| norma24.de | #43,229 | Akamai Edge DNS, DigiCert, Google Tag Manager + 7 more | Find emails |
| simplybook.it | #43,239 | Cloudflare edge/CDN, Google Analytics, Google Tag Manager + 8 more | Find emails |
| lootlabs.gg | #43,247 | AWS Lambda, Amazon CloudFront, Amazon S3 + 14 more | Find emails |
| softsurroundings.com | #43,255 | AB Tasty, Amazon Route 53, Apple Pay + 13 more | Find emails |
| care.org | #43,262 | BrightEdge, Fastly, Google Tag Manager + 13 more | Find emails |
| simplelocalize.io | #43,277 | Atlassian Statuspage, Cloudflare, 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 →