Zephyr is a real-time operating system (RTOS) that supports over 750 boards and runs in commercial products. Learn how to get started, join the community, and access technical resources and news. Thanks to these recent improvements, the previously observed performance gap with other open-source RTOSes has been largely closed. The chart below shows Zephyr 4.1 as the baseline (in dark purple) and illustrates how Zephyr ’s performance pretty much matches Eclipse ThreadX’s and surpasses FreeRTOS’s in most situations. With Zephyr now roughly on par performance-wise, it is actually a good reminder that performance is only one of the many aspects that should make you pick an RTOS over ... Explore Zephyr RTOS: installation guide, features, pros & cons. Perfect for firmware developers seeking an efficient, versatile, and cost-effective RTOS solution. Getting Started Guide Follow this guide to: Set up a command-line Zephyr development environment on Ubuntu, macOS, or Windows (instructions for other Linux distributions are discussed in Install Linux Host Dependencies) Get the source code Build, flash, and run a sample application Select and Update OS Click the operating system you are using.