FreeRTOS vs OPNsense
| FreeRTOS | OPNsense | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | — | api, self-hosted, Web |
| Free plan | Yes | Yes |
| Device types | Microcontrollers and small microprocessors | — |
| CPU architectures | 40+ processor architectures, including RISC-V and ARMv8-M | — |
| Support lifecycle | LTS libraries receive security updates and critical bug fixes for two years | — |
| App compatibility | Kernel ports, demos, and reference integrations; 15+ toolchains | — |
| Deployment models | Embedded physical devices; cloud images not verified | — |
Both are listed in Best Operating Systems. On Everything Xiaomi, OPNsense scores higher on our published basis.