| Web Servers & Operating Systems | |
| Apache HTTP Server Long-established open-source web server software | 72.1M sites |
| OpenSSL Cryptography toolkit implementing TLS and SSL protocols | 1.8M sites |
| Windows Server Microsoft server operating system for hosting applications | 6M sites |
| Languages & Back-End Frameworks | |
| PHP Server-side scripting language powering a large share of websites | 93.5M sites |
| other | |
| ACME/Let's Encrypt Free TLS certificates issued automatically over the ACME protocol | 11.7M sites |
| Hi3G | 958 sites |
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