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ctlptl vs k3d: catalog facts
ctlptl	k3d
Free Free and open source under the Apache 2.0 licence.	Free Free and open source, supported by sponsorships.
macOS, Linux, Command line	Command line
Declarative cluster definitions instead of manual setup steps Lets developers try Kubernetes locally without extra hardware	Creates single- and multi-node Kubernetes clusters in seconds Runs entirely inside Docker
Aimed at local development clusters, not production Assumes familiarity with Kubernetes concepts	Requires Docker and kubectl Aimed at development rather than production clusters
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

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