A Small, Scalable Open Source RTOS for IoT Embedded Devices

The Zephyr™ Project is a scalable real-time operating system (RTOS) supporting multiple hardware architectures, optimized for resource constrained devices, and built with safety and security in mind.
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Complete flexibility & freedom of choice

Open source & neutral governance

Supports multiple hardware architectures

Scales from small cortex-m devices to multi core 64-bit CPUs

Connect small footprint IoT devices securely to any cloud

Multi protocol options including BLE mesh and thread

Supporting industrial, automotive, smart city and smart home

Cloud agnostic – Connect with transport layer security to any cloud

Develop products with safety built in

Long term support

In-depth security development lifecycle

Functional safety certification coming soon

What's New


Zephyr RTOS and Cortex-R5 on Zynq UltraScale+

| Blog | No Comments
This blog originally appeared on the Antmicro blog. The UltraScale+, a high-performance FPGA SoC designed for heterogeneous processing with 4 Cortex-A53 cores and 2 Cortex-R5 cores, is often used in…

The Zephyr Project Announces Major Technical Milestone with New Long Term Support Code Release

| Announcements | No Comments
Core Infrastructure Initiative (CII) awards Zephyr with Gold Best Practice Badge for driving security, quality and stability of open source software SAN FRANCISCO – April 17, 2019 – The Zephyr™…


Oct 28

Embedded Linux Conference Europe

October 28, 2019 - October 30, 2019

Find out more about Zephyr Project

Videos, presentations, demos, and more

Read the project documentation

Pull Requests Closed

As of Release 2.0.0 (September 2019)

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