Microsoft Active Directory is described as 'Active Directory (AD) is a directory service that Microsoft developed for Windows domain networks and included in most Windows Server operating systems as a set of processes and services' and is an app in the network & admin category. There are more than 10 alternatives to Microsoft Active Directory for a variety of platforms, including Linux, Self-Hosted, Web-based, Windows and Mac apps. The best Microsoft Active Directory alternative is Zentyal. It's not free, so if you're looking for a free alternative, you could try Samba or Univention Corporate Server (UCS). Other great apps like Microsoft Active Directory are Microsoft Entra ID, FreeIPA, SambaBox and pGina Fork.