zephyrproject-rtos

    zephyrproject-rtos/zephyr

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

    17.1K stars
    10.4K forks
    407 GitHub watchers
    Updated Nov 11, 2026
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    Where it stands

    Rank, growth pace and release cadence relative to everything GStars tracks.

    2 releases in the last 90 days, the latest 11 days ago, with 403 contributors on GitHub.

    Use Cases & Benefits

    • Provides a scalable, secure real-time operating system optimized for resource-constrained embedded devices across multiple hardware architectures.
    • Offers broad hardware support and a small-footprint kernel designed for efficient operation on low-resource microcontrollers and IoT devices.
    • Use for developing firmware on ARM Cortex-M microcontrollers in battery-powered IoT sensors requiring real-time responsiveness.
    • Use for building secure Bluetooth Low Energy applications on wearable devices with constrained memory and processing power.
    • Use for creating multi-architecture embedded systems including Intel x86, RISC-V, and ARC platforms in industrial automation.

    Should you depend on it?

    License terms, project hygiene and risks, from GitHub metadata and GStars' snapshots.

    License

    Apache 2.0

    Permissive: commercial use, modification and redistribution are allowed with attribution; includes an explicit patent grant from contributors.

    Community files

    • README: present
    • Contributing guide: present
    • Code of conduct: present

    Watch-outs

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    From the README

    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-A, Cortex-R, Cortex-M), Intel x86, ARC, Tensilica Xtensa, and RISC-V, SPARC, MIPS, and a large number of supported boards_.

    .. below included in doc/introduction/introduction.rst

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

    Excerpt from the zephyrproject-rtos/zephyr README on GitHub (Apache-2.0 license). © its authors.Read the full README on GitHub

    Daily snapshots

    Stars gained per day, and how forks and open issues moved, from GStars' daily snapshots

    Forks

    10.4K+649

    Open issues

    4.9K+1.1K

    Compared with peers in Messaging

    Fastest-growing repositories GStars tracks in this cohort for the week of Nov 8, by 7-day star growth

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    Category median11.9K—51—

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