| Price from | — | — |
| Free plan | — | — |
| Free trial | — | Yes |
| Open source | — | — |
| Windows | Yes | Yes |
| Plans published | 0 | 3 |
| Spec score · Executable Packers | 7.1 (#21) | 7.9 (#9) |
| Compression | Fatpack compresses target executables with LZMA. | The maker says PECompact preprocesses PE code and data to improve compression compared with general archivers. |
| Intended users | The documented workflow is for users packaging a target executable with the Fatpack.exe command-line tool. | Bitsum says it discourages use by non-developers and requires prospective trial users to verify they are legitimate software authors. |
| Purpose | Fatpack is a Windows PE packer for x64 executables. | PECompact compresses Windows native executable files (PEs). |