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Omeka S vs Omeka: catalog facts
Omeka S	Omeka
Free Free and open source under the GPL-3.0 license.	Free Free and open source under GPL-3.0; hosting and support are sold separately.
Self-hosted	Web, Self-hosted
Many sites from one installation with a shared item pool Linked open data and DPLA-ready templates	Designed for collections and exhibits Dublin Core metadata support
Needs a LAMP server to run Built around cultural heritage collections rather than general websites	Specialised for collections rather than general websites Choosing between Omeka S and Classic adds a step
Self-hosted	Self-hosted, Hosted service
Open source	Open source
License: GPL-3.0	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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