LLDAP
Identity & SSOLightweight LDAP server with a simple web interface
Replaces Active Directory, OpenLDAP
5 self-hosted Active Directory alternatives
Active Directory is a popular proprietary tool in the identity & sso space. These open-source apps let you replace Active Directory with software you host and control yourself.
Best self-hosted Active Directory alternatives
Kanidm
Identity & SSOModern, simple and secure identity management server
Replaces Active Directory, Okta
FreeIPA
Identity & SSOIntegrated identity management for Linux and Unix environments
Replaces Active Directory
Samba Active Directory DC
Identity & SSOOpen-source Active Directory compatible domain controller
Replaces Active Directory, Windows Server
OpenLDAP
Identity & SSOThe classic open-source Lightweight Directory Access Protocol server
Replaces Active Directory
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Compare Active Directory alternatives
Switching from Active Directory
Moving off Active Directory means trading a managed subscription for a service you run yourself. The payoff is ownership: no per-seat pricing, no vendor lock-in, and full control of your data. Start with the option above that matches your setup-difficulty comfort level — every app links to a detailed specs page and head-to-head comparisons.