2 self-hosted Microsoft Active Directory alternatives

Microsoft Active Directory is a popular proprietary tool in the identity & sso space. These open-source apps let you replace Microsoft Active Directory with software you host and control yourself.

Best self-hosted Microsoft Active Directory alternatives

GLAuth

Identity & SSO

Lightweight LDAP server for developers and small setups

Replaces Microsoft Active Directory, OpenLDAP

★ 2.8k Easy setup MIT

Univention Corporate Server

Identity & SSO

Integrated identity and infrastructure management platform

Replaces Microsoft Active Directory

★ 293 Hard setup AGPL-3.0

Compare Microsoft Active Directory alternatives

GLAuth vs Univention Corporate Server

Switching from Microsoft Active Directory

Moving off Microsoft 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.