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Nx vs Buck2: catalog facts
Nx	Buck2
Freemium The build system is free; scalable CI features are offered as a separate service.	Free Free and open source.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Caches task results to skip repeated work Orchestrates tasks across projects in a monorepo	Hermetic builds by default Extensible rules written in Starlark
Most useful for larger multi-project repositories Adds configuration and concepts to learn	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 September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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