Side by side
Buck2 vs FASTBuild
Both stand on build automation software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxMacSelf-hosted+1
Buck2 offers extensible builds and remote execution for large, multi-language repositories. Its early-stage status, changing binary tag, and uneven language usability are important considerations.
Visit Buck2 Free plan LinuxMacWindows
FASTBuild offers parallel compilation, caching and network distribution in a self-contained executable. Its benefits depend on compatible compiler settings and properly configured workers, and the license disclaims warranty.
Visit FASTBuildThe facts
| Buck2 | FASTBuild | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Linux, Mac, Self-hosted, Windows | Linux, Mac, Windows |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 1 |
| Maker | Not published | Not published |
| Website | buck2.build | fastbuild.org |
| On build automation software | #4 of 42 | #8 of 42 |
Buck2: what it does well
- Free, with source and binaries under two listed licenses
- Supports remote execution through compatible API services
- Includes rules for nine listed languages
- Filesystem watching supports large repositories
What to know first
- Early-stage project may have rough edges
- No stable release tag
- Language support usability varies
- Local-only build steps are not sandboxed
FASTBuild: what it does well
- Free, open-source software permits commercial use.
- Compilation can run across worker threads.
- Local and network caches reuse compilation results.
- Can distribute compilation across networked machines.
- Generates Visual Studio and XCode project files.
What to know first
- Some settings prevent caching for affected objects.
- Some settings require affected objects to build locally.
- License provides the software as-is without warranty.
Alternatives to Buck2 Alternatives to FASTBuild The whole list

