Compare software

moon vs Buck2: catalog facts
moon	Buck2
Free Free and open source under the MIT licence.	Free Free and open source.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Smart hashing and remote caching cut repeated build work Installs pinned versions of languages and tools per workspace	Hermetic builds by default Extensible rules written in Starlark
Adds a layer of configuration that small single-project repositories may not need Most useful for teams managing many projects in one repository	Designed for large monorepos and may be heavy for small projects Learning curve for BUCK files and Starlark rules
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT OR Apache-2.0
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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