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Zephyr Project

The Zephyr Project is a scalable real-time operating system (RTOS) supporting multiple hardware architectures, optimized for resource constrained devices, and built with security in mind.

The Zephyr OS is based on a small-footprint kernel designed for use on resource-constrained systems: from simple embedded environmental sensors and LED wearables to sophisticated smart watches and IoT wireless gateways.

The Zephyr kernel supports multiple architectures, including ARM Cortex-M, Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V, and a large number of supported boards.

Getting Started

Welcome to Zephyr! See the Introduction to Zephyr for a high-level overview, and the documentation's Getting Started Guide to start developing.

Community Support

Community support is provided via mailing lists and Discord; see the Resources below for details.


Here's a quick summary of resources to help you find your way around:


  1. zephyr Public

    Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.

    C 8.4k 5.2k

  2. west Public

    West, Zephyr's meta-tool

    Python 166 102

  3. example-application Public template

    Example out-of-tree application that is also a module

    C 144 91

  4. sdk-ng Public

    Zephyr SDK (Toolchains, Development Tools)

    C 132 108

  5. Docker image suitable for development and CI

    Shell 97 65


Showing 10 of 132 repositories