Side by side
Apache NuttX vs FreeRTOS
Both stand on operating systems. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan Open source APILinuxMac+2
Choose Apache NuttX for embedded development when its supported architectures and POSIX/ANSI-oriented APIs fit your project. Its stated deployment targets are physical embedded devices and simulator targets.
Visit Apache NuttX Free plan LinuxWindows
FreeRTOS combines embedded operating-system features with wide architecture support and a two-year LTS maintenance period. Its listed plan is free under the MIT license.
Visit FreeRTOSThe facts
| Apache NuttX | FreeRTOS | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Yes | Not published |
| Runs on | API, Linux, Mac, Self-hosted, Windows | Linux, Windows |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 1 |
| Maker | Not published | Not published |
| Website | nuttx.apache.org | freertos.org |
| On operating systems | #2 of 42 | #16 of 42 |
Apache NuttX: what it does well
- Free software with a free plan
- Supports a broad range of CPU architectures
- Configurable build system
- POSIX/ANSI-oriented APIs
- ELF and NXFLAT module loading
What to know first
- Its stated targets are embedded devices and simulator environments
- The build system is configurable around boards and architectures
FreeRTOS: what it does well
- Supports more than 40 processor architectures.
- Compatible with more than 15 toolchains.
- Includes a thread-safe TCP stack with IPv6.
- LTS libraries get fixes and security updates for two years.
What to know first
- Cloud image deployment is not verified.
- Free trial is not available.
Alternatives to Apache NuttX Alternatives to FreeRTOS The whole list