Zephyr
Fewer than 5 people recommend it so far, so there's no written verdict. Here is what commenters said.
4recommend
1warn against
Nov 3, 2025first mention
Oct 10, 2026latest mention
Why people recommend it
“newer Zephyr Iot (awesome, also underlies Framework's new embedded controllers)”
Show 2 more
“other FOSS OSes are being adopted, without GPL licensing, like Zephyr, NutXX, FreeRTOS”
“Zephyr is what Nordic bases all of their modern SDKs on.”
Caveats and dissent
“nRF Connect SDK + the Zephyr config/tooling stack”
Who recommends it in their own words
Threads where it came up
- The Arduino Uno Q is a weird hybrid SBC 2 mentions
- Unikernels were hard. key word: were 1 mention
- The newest ESP32 can run Linux and it's getting close to a Raspberry Pi 1 mention
- Async Rust vs RTOS showdown (2022) 1 mention
- Ask HN: Who is hiring? (August 2026) 1 mention
- The MilkV Jupiter 2/SpacemiT K3 (RISC-V vector compute) 1 mention
Data: zephyr.json. Quotes are verbatim; the verdict and theme labels are written by a model from these comments, and every clause links to its sources.
All comments 14
“became a fan of Zephyr”
“Zephyr rtos on raspberry pi sbc”
“Most of exist C RTOS work quite similar(FreeRTOS, Zephyr, ThreadX)”
“What we've deployed recently: TypeScript, WASM, Rust, C, Python, RTOS (Zephyr, FreeRTOS), embedded Linux.”
“newer Zephyr Iot (awesome, also underlies Framework's new embedded controllers)”
“other FOSS OSes are being adopted, without GPL licensing, like Zephyr, NutXX, FreeRTOS”
Awesome! Yeah, I haven't used west-sans-Zephyr yet but interestingly enough NXP decided to use it for their MCUXpresso framework: https://github.com/nxp-mcuxpresso/mcuxsdk-manifests/blob/main/west.yml I have mixed feelings about west in general, but I like it enough that I'd probably look at doing something like that in the future too for harmony-sake with our existing Zephyr projects.
“nRF Connect SDK + the Zephyr config/tooling stack”
“Why ZephyrOS?”
“Zephyr is what Nordic bases all of their modern SDKs on.”
“from my short three day experience with Zephyr I like uCLinux a lot better”
“As well as Zephyr, NuttX RTOSes, MicroPython.”
“what you describe is already possible with the pi and asymmetric multiprocessing using openamp and zephyr.”
“get some practice with Zephyr on the MCU”