- With the penetration of Internet amongst masses, the majority web sites hosted on the internet are hosted on Unix servers. Unix is usually more dependable than Windows hosting and more companies are on UNIX than windows simply because it is faster and open source (meaning it is completely free unlike Windows which has hefty license fees). Also, it has the ability to host many websites on the same machine. Almost all CGI scripts run better on Unix. Provides better programming suppleness and gives much more administrative control.