Composer vs Spack
| Composer | Spack | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | Linux, macOS, self-hosted, Windows | Linux, macOS, Windows |
| Free plan | Yes | Yes |
| Package formats | PHP packages; ZIP; TAR; VCS repositories | — |
| Supported platforms | PHP; Windows; Linux; macOS | — |
| Dependency resolution | Yes | — |
| Lockfile support | Yes | Yes |
| Workspace support | Yes | — |
| Private registry auth | Yes | — |
| Offline installation | Yes | — |
Both are listed in Best Package Managers. On Samsung Mobile US Press, Composer scores higher on our published basis.