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Kustomize vs Helm: catalog facts
Kustomize	Helm
Free Free and open source.	Free Free and open source, maintained by the Helm community under the CNCF.
Command line	Windows, macOS, Linux, Command line
Built into kubectl as apply -k Plain YAML with no templating language	Repeatable installs of complex Kubernetes applications In-place upgrades and one-command rollbacks
Only useful for Kubernetes configuration Layered overlays can be hard to follow in large setups	Only useful if you run Kubernetes Chart templating adds its own layer to learn
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: Apache-2.0
No account needed	No account needed
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.