This post summarizes some standards and implementations of Directory Services.
List of Directory Services
Lightweight Directory Access Protocol (LDAP) is a standard, not an implementation.
List of Directory Services Implementations
- Active Directory
Active Directory is a solution by Microsoft that follows the X.500 standard.
Do not confuse with Azure Active Directory.
Active Directory is compatible with LDAP, unlike other Microsoft solutions like Azure Active Directory.
OpenLDAP is an open-source implementation of LDAP.
- Kate Lake; “The Difference Between LDAP, OpenLDAP and Active Directory“; JumpCloud