| Security & Bot Defense | |
| HSTS HTTP header forcing browsers to use secure HTTPS connections | 117.3M sites |
| hCaptcha CAPTCHA service blocking bots while preserving privacy | 898.5K sites |
| Web Servers & Operating Systems | |
| HTTP/3 Modern web transport protocol over QUIC for faster connections | 138.6M sites |
| Front-End Frameworks & UI Toolkits | |
| PWA Progressive web app technology enabling installable, offline-capable sites | 26.5M sites |
| other | |
| Two7363Securitiesou | 70 sites |
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