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Buck2 vs Xmake: catalog facts
Buck2	Xmake
Best for: Teams with large multi-language monorepos	Best for: C and C++ developers who want a simpler alternative to CMake
Free Free and open source.	Free Free and open source.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Hermetic builds by default Extensible rules written in Starlark All 3 strengths for Buck2 Hermetic builds by default Extensible rules written in Starlark Supports many languages in one build graph	Readable Lua-based build files Built-in package management with Conan and vcpkg integration All 4 strengths for Xmake Readable Lua-based build files Built-in package management with Conan and vcpkg integration Generates IDE project files Remote and distributed builds
Designed for large monorepos and may be heavy for small projects Learning curve for BUCK files and Starlark rules	Less widely adopted than CMake Requires learning its Lua configuration style
Downloadable app	Downloadable app
Open source	Open source
License: MIT OR Apache-2.0	License: Apache-2.0
No account needed	No account needed
Offline features available	Offline features available
Official website Full listing and sources Sources for Buck2 buck2.build Catalog checked October 1, 2026	Official website Full listing and sources Sources for Xmake xmake.io Catalog checked October 1, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.