BareMetal
| Developer | Return Infinity |
|---|---|
| Written in | Assembly |
| Working state | Current |
| Source model | Open source |
| Initial release | 2008 |
| Latest release | 2025.04 / April 30, 2025 |
| Marketing target | HPCs, HTC, Cloud computing |
| Available in | English |
| Platforms | x86-64 |
| Kernel type | Exokernel, SASOS |
| Userland | Unknown |
| Default user interface | Command-line |
| License | BSD License |
| Official website | www |
BareMetal is an exokernel-based single address space operating system (OS) created by Return Infinity.
It is written in assembly to achieve high-performance computing with minimal footprint with a "just enough operating system" (JeOS) approach. The operating system is primarily targeted towards virtualized environments for cloud computing, or HPCs due to its design as a lightweight kernel (LWK). It could be used as a unikernel.
It was inspired by another OS written in assembly, MikeOS, and it is a recent example of an operating system that is not written in C or C++, nor based on Unix-like kernels.