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389 Directory Server vs OpenLDAP: catalog facts
389 Directory Server	OpenLDAP
Free Free and open source.	Free Free, open-source software developed by the OpenLDAP community.
Linux, Self-hosted	Linux, Self-hosted, Command line
Multi-supplier replication for scaling and fail-over Proven in very large deployments	Full LDAP server plus client libraries and command-line tools Separate feature and long-term support release series
Linux only Requires LDAP knowledge to run well	No graphical management interface included Configuration and schema design take real LDAP knowledge
Downloadable app, Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.