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SCons vs Bazel: catalog facts
SCons	Bazel
Free Free and open source under the MIT licence.	Free Free and open source.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Build files are Python scripts Automatic dependency scanning for C, C++ and Fortran	Rebuilds only what changed, with local and distributed caching One tool for many languages and platforms
Requires Python to run Less common than CMake or Make in many projects	Build files and rules take time to learn Adds overhead that small single-language projects may not need
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License not stated
No account needed	No account needed
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 September 23, 2026

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