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Omeka vs Omeka S: catalog facts
Omeka	Omeka S
Free Free and open source under GPL-3.0; hosting and support are sold separately.	Free Free and open source under the GPL-3.0 license.
Web, Self-hosted	Self-hosted
Designed for collections and exhibits Dublin Core metadata support	Many sites from one installation with a shared item pool Linked open data and DPLA-ready templates
Specialised for collections rather than general websites Choosing between Omeka S and Classic adds a step	Needs a LAMP server to run Built around cultural heritage collections rather than general websites
Self-hosted, Hosted service	Self-hosted
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.