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Harbor vs zot: catalog facts
Harbor	zot
Free Free and open source.	Free Free and open source under the Apache 2.0 license.
Linux, Self-hosted	macOS, Linux, Self-hosted
Built-in vulnerability scanning and content signing Role-based access control with identity integration	Single static binary with no external services Runs without root privileges
Heavier to run than a plain registry Needs Docker or Kubernetes to install	Aimed at users comfortable running server software No graphical desktop client
Self-hosted	Self-hosted
Open source	Open source
License not stated	License: Apache-2.0
Not stated if an account is needed	No account 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 23, 2026

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