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FreeRTOS

Real-time operating system for microcontrollers and small microprocessors

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FreeRTOS is an open-source RTOS distributed under the MIT license, comprising a kernel and a set of libraries for use across industry sectors. It supports 40+ MCU architectures and 15+ toolchains from a single code base, with an emphasis on reliability and ease of use. Long Term Support (LTS) releases provide feature stability, with security updates and critical bug fixes for two years, maintained by AWS.

12 alternatives to FreeRTOS

Ranked by how well each tool replaces FreeRTOS: shared features, audience, price and popularity.

  1. Ubuntu

    Enterprise open source operating system published by Canonical

    Covers 1 of 15 key features and has a free plan.

    Free planOpen source
    64 out of 100 matchContact sales

  2. Apache NuttX

    A free and open-source real-time operating system (RTOS) for embedded systems.

    Covers 3 of 15 key features and has a free plan.

    Free planOpen source
    63 out of 100 matchFree

  3. FreeBSD

    The Power to Serve

    Covers 5 of 15 key features and has a free plan.

    Free planOpen source
    61 out of 100 matchContact sales

  4. RabbitMQ

    One broker to queue them all

    Covers 8 of 15 key features and has a free plan.

    Free planOpen source
    61 out of 100 matchFree

  5. Arduino

    Open-source electronic prototyping platform enabling users to create interactive objects.

    Covers 3 of 15 key features.

    Open source
    60 out of 100 match—

  6. Scaleway

    European Cloud & AI provider (as described on the site)

    Covers 2 of 15 key features.

    60 out of 100 match—

  7. Gentoo Linux

    A flexible, source-based Linux distribution

    Covers 3 of 15 key features and has a free plan.

    Free planOpen source
    60 out of 100 matchContact sales

  8. Haiku

    An open source OS targeting speed and personal computing.

    Covers 9 of 15 key features.

    Open source
    60 out of 100 match—

  9. NLnet Labs

    Open source innovation. Mission critical reliability.

    Covers 11 of 15 key features and has a free plan.

    Free planOpen source
    59 out of 100 matchFree

  10. Eclipse IoT

    Leading open source community for IoT innovation.

    Covers 5 of 15 key features and has a free plan.

    Free planOpen source
    59 out of 100 matchFree

  11. Debian

    A free operating system built by a volunteer association of individuals, distributed as a

    Covers 6 of 15 key features and has a free plan.

    Free planOpen source
    59 out of 100 matchContact sales

  12. Linux Lite

    Simple, Fast, and User-Friendly Linux

    Covers 5 of 15 key features and has a free plan.

    Free plan
    58 out of 100 matchFree