The Best 10 Microsoft Active Directory Alternatives

  • Samba

    Samba is the standard Windows interoperability suite of programs for Linux and Unix.

    Free Open Source Mac OS X Linux BSD

  • Zentyal

    Zentyal is a native Microsoft Active Directory® implementation on Linux incorporating all the network services required in a small and medium business environment: Directory & Domain Server, Mail Server, Gateway and Infrastructure...

    Free Open Source Linux

  • OpenLDAP

    OpenLDAP Software is an open source implementation of the Lightweight Directory Access Protocol. The suite includes: slapd - stand-alone LDAP daemon (server) ...

    Free Open Source Mac OS X Linux BSD

  • FreeIPA

    FreeIPA is an integrated security information management solution combining Linux (Fedora), 389 Directory Server, MIT Kerberos, NTP, DNS, Dogtag (Certificate System). It...

    Free Open Source Linux

  • 389 Directory Server

    Enterprise-class open source Linux LDAP server. Hardened by real-world use, full-featured, supports multi-master replication. 389 DS can be downloaded for free and set...

    Free Open Source Linux CentOS Fedora

  • RazDC

    It's an active directory replacement built on CentOS + Samaba4. Includes support for Directory, DNS, DCHP, and NTP type services. Features • MS Compatible...

    Free Open Source Linux Self-Hosted

  • ApacheDS

    ApacheDS™ is an extensible and embeddable directory server entirely written in Java, which has been certified LDAPv3 compatible by the Open Group. Besides LDAP it...

    Free Open Source Mac OS X Windows Linux