Apache NuttX vs postmarketOS
| Apache NuttX | postmarketOS | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | — | Linux |
| Free plan | Yes | Yes |
| Device types | Development boards and embedded devices; simulator targets are also documented | phones, tablets, laptops, Chromebooks, single-board computers, x86_64 EFI systems |
| CPU architectures | ARM, ARM64, AVR, AVR32, 8051, CEVA, ESP32 Xtensa, Intel x86/x86_64, MIPS, m68k, RISC-V, SPARC, SuperH, TriCore, Xtensa, Z80 | aarch64, armv7, x86_64, riscv64 |
| Built-in management | Configurable build system; native board/architecture configuration; driver and power-management subsystems | Stable and edge release channels; kernel and system package upgrades; automatic kernel upgrades required for community-category devices |
| App compatibility | POSIX/ANSI-oriented APIs; binary loader supports ELF and NXFLAT modules and built-in applications | Alpine apk packages; Flatpak is primary application distribution for Duranium |
| Deployment models | Physical embedded boards/devices and simulator targets | Physical device installation; Duranium also uses standard GPT partitions on compatible laptops |
| Support lifecycle | — | No fixed duration stated; stable kernel packages are kept up to date while the release is supported; device support depends on category and maintainers. |
Both are listed in Best Operating Systems. On Specifiction, postmarketOS scores higher on our published basis.