LDAP vs OpenLDAP: What are the differences?
What is LDAP? A lightweight directory access protocol. It is a mature, flexible, and well supported standards-based mechanism for interacting with directory servers. It’s often used for authentication and storing information about users, groups, and applications, but an LDAP directory server is a fairly general-purpose data store and can be used in a wide variety of applications.
What is OpenLDAP? An open source implementation of the Lightweight Directory Access Protocol. It is a free, open-source implementation of the Lightweight Directory Access Protocol. Lightweight Directory Access is an application protocol that is used to crosscheck information on the server end.
LDAP and OpenLDAP belong to "User Management and Authentication" category of the tech stack.