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Docker Buildx vs ko: catalog facts
Docker Buildx	ko
Free Free and open source.	Free Free to use; the source is published on GitHub.
Command line	Command line
Multi-platform image builds from one command Access to the full BuildKit feature set	No Dockerfile or Docker installation needed Multi-platform builds and SBOMs by default
Requires the Docker CLI Command-line only	Only for Go applications Not suited to images needing cgo or OS packages
Downloadable app	Downloadable app
Open source	Open source
License not stated	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 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.