Product
Vendor
Software license [ a]
Initial Release
Last Release
Last Version
Comments
389 Directory Server
Red Hat
GPL linking exception [ 1] with exception to allow linking to non-GPL[ 2]
2005, Dec,
2024, May 15
3.1.0
Formerly Fedora Directory Server
Microsoft Entra ID
Microsoft
Proprietary
2008, Oct 27
2025
?
Known as Azure Active Directory (AAD) as well
Red Hat Identity Manager (IdM)
Red Hat
Proprietary
2008, Apr 1
2024
4.12
Fork of FreeIPA . Based on (RHEL 9.10
Active Directory
Microsoft
Proprietary
2000
2024, Nov 1
91 (WS 2025)
Integrated on Windows Server
Authorized Entities Directory (Æ-DIR)
Michael Ströder
Apache 2.0
Based on OpenLDAP with additional tools
Apache Directory Server
Apache Software Foundation
Apache 2.0
2006, Oct
2023, Oct 23
2.0.0-AM27
Apple Open Directory -
Apple Inc.
Proprietary [ 3]
A fork of the OpenLDAP project
CA Directory
CA Technologies
Proprietary
2024, Dec 2
14.1
CA Tech was acquired by Broadcom Inc in 2018
Directory services -
ForgeRock
Proprietary
A fork of the OpenDJ project
DirX Directory
Atos (ex-Siemens)[ citation needed ]
FreeIPA
GNU
GPL
2008, Apr 1
2024, June 10
4.12.1
Using 389 Directory Server
IBM Tivoli Directory Server
IBM
Proprietary
2024, Oct 7
7.5
Mandriva Directory Server
Mandriva development team
GPL
2011
2021, Nov 23
Now part of Mandriva Management Console
Meerkat DSA
Wildboar Software
MIT
Also supports the full X.500 directory protocols: DAP, DSP, and DOP
Nexor Directory
[ citation needed ]
[ citation needed ]
NetIQ eDirectory
NetIQ
Proprietary
1993
2023, May 31
9.2.8
Successor. Originally known as Novell Directory Services (NDS). Successr of eDirectory and NDS.
OpenDJ
Open Identity Platform Community
CDDL
2010, Dec 21
2024, May 7
4.6.3
A fork of the OpenDS project developed by ForgeRock , until 2016,[ 4] now maintained by OpenDJ Community
OpenDS
Sun Microsystems
CDDL
2024, May 7
4.6.3
CDDL-licensed product no longer maintained, now Oracle Unified Directory.
OpenLDAP
Kurt Zeilenga and others (based on Slapd)
OpenLDAP Public License
1998, Aug 26
2024, Nov 26
2.6.9
LDAP clone from University of Michigan
Oracle Directory Server Enterprise Edition [ 5]
Oracle , based on Sun DSEE
Proprietary
11g
Oracle Internet Directory
Oracle
Proprietary
2023, Jan
12.2.1.4
Oracle Unified Directory (OUD)
Oracle , based on OpenDS
Proprietary
2024, Apr
12.2.1.4
Based on OpenDJ
Red Hat Directory Server
Red Hat
GPL plus exception
2024, May 15
3.1.0
Commercial version of 389 Directory Server
Samba4
Samba Team
GPLv3
1992, Jan
2025, Jan 6
4.21.3
Active Directory compatible Domain Controller
Slapd
University of Michigan
Free[ citation needed ]
1993
1996
Standalone LDAP Daemon. Superseded by OpenLDAP[ 6]
Sun Java System Directory Server
Sun Microsystems
[ citation needed ]
2011
2011
No longer maintained