Multiprotocol application based on FreeRTOS using nRF Connect SDK

Question

Hello Nordic support, 
 I have a requirement to develop a multiprotocol (BLE , ZigBee, Thread) application on nRF52840 and planning to use nRF Connect SDK for the development. I understand that nRF Connect SDK is based on Zephyr RTOS but I would like to use FreeRTOS to manage my application. On looking at this following page in nRF Connect SDK documentation: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrfxlib/mpsl/doc/mpsl.html, I see that a multiprotocol application can be either RTOS-based or RTOS-free. 
 So, I would like to understand if I can develop the multiprotocol application using nRF Connect SDK with FreeRTOS. 
 Regards, 
 Anusha

Susheel Nuguru · Accepted Answer

On looking at this following page in nRF Connect SDK documentation: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrfxlib/mpsl/doc/mpsl.html, I see that a multiprotocol application can be either RTOS-based or RTOS-free. 
 It means is that the nrfxlib (which is a library) are RTOS agnostic (nRF Connect SDK is not RTOS agnostic and works only with Zephyr RTOS). if you write an application using only nrfxlib, then your application can be ported easily to different RTOS based or non RTOS based system. But if you are writing an application on top of nRF Connect SDK which in turn also uses nrfxlib apart from other Zephyr based API, then your application is locked the Zephyr and will not work on FreeRTOS.