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Harbor vs Project Quay: catalog facts
Harbor	Project Quay
Free Free and open source.	Free Free to self-host as an open-source project.
Linux, Self-hosted	Web, Self-hosted
Built-in vulnerability scanning and content signing Role-based access control with identity integration	Private registry you host yourself Image security scanning
Heavier to run than a plain registry Needs Docker or Kubernetes to install	Heavier to deploy than a simple registry Aimed at teams more than single users
Self-hosted	Self-hosted
Open source	Open source
License not stated	License not stated
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 September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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