List of Top Free Open Source & Self Hosted Application for Federated Identity & Authentication

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Federated identity and authentication software.

389 Directory Server – Enterprise-class Open Source LDAP server for Linux. GPL-3.0 C
Apache Directory Server – Extensible and embeddable directory server, certified LDAPv3 compatible, with Kerberos 5 and Change Password Protocol support, triggers, stored procedures, queues and views. Apache-2.0 Java
FreeIPA – Integrated security information management solution combining Linux (Fedora), 389 Directory Server, Kerberos, NTP, DNS, and Dogtag Certificate System (web interface and command-line administration tools). GPL-3.0 Python/C/JavaScript
FreeRADIUS – Multi-protocol policy server (radiusd) that implements RADIUS, DHCP, BFD, and ARP and associated client/PAM library/Apache module. GPL-2.0 C
lldap – Light (simplified) LDAP implementation with a simple, intuitive web interface and GraphQL support. GPL-3.0 Rust
OpenLDAP – Open-source implementation of the Lightweight Directory Access Protocol (server, libraries and clients). OLDAP-2.8 C

Ashwani K

👤 About the Author

Ashwani is passionate about DevOps, DevSecOps, SRE, MLOps, and AiOps, with a strong drive to simplify and scale modern IT operations. Through continuous learning and sharing, Ashwani helps organizations and engineers adopt best practices for automation, security, reliability, and AI-driven operations.

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