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Railpack vs pack: catalog facts
Railpack	pack
Free Free and open source under the MIT licence.	Free Free and open source under the Apache 2.0 licence.
Windows, Command line	Windows, Command line
Builds images without writing a Dockerfile Supports many languages and popular static site frameworks	Builds container images from source without a Dockerfile Official CLI of the Cloud Native Buildpacks project
Requires BuildKit to build images Automatic detection may need config overrides for unusual projects	Needs a container runtime and builder images to be useful Buildpack concepts take time to learn
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: Apache-2.0
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 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.