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Best IoT Operating Systems in 2026

An IoT operating system forms part of the software foundation for connected devices and fleets. Compared on deployment model, supported device OS, and protocol support, these options can be assessed for technical compatibility. Fleet provisioning, certificate management, and over-the-air updates are relevant capabilities to examine, while device limits, free plans, and paid-from pricing add scale and cost considerations. Apache Mynewt and Contiki-NG are among the entries, as is Particle Device OS. Use the listed criteria to judge how each option aligns with your device environment and fleet requirements.

  1. 1

    Apache NuttX

    Free plan Open source APILinuxMac+2

    Choose Apache NuttX for embedded development when its supported architectures and POSIX/ANSI-oriented APIs fit your project.

    9.2 Free plan Visit site
  2. 2

    OpenWrt

    by OpenWrt
    Free plan Open source AndroidAPILinux+2

    Choose OpenWrt if you want a free Linux system for an embedded device and are comfortable checking compatibility and configuring it.

    8.9 Open source Visit site
  3. 3

    Apache Mynewt

    Free plan LinuxMacSelf-hosted+1

    Apache Mynewt brings an embedded operating system together with development tooling, networking stacks, and device operations.

    7.7 Open source Visit site
  4. 4

    Contiki-NG

    Free plan LinuxMacSelf-hosted+1

    Contiki-NG offers a small-footprint, protocol-rich option for constrained IoT devices. Check the documented hardware and link-security status against the intended deployment.

    7.5 Open source Visit site
  5. 5

    FreeRTOS

    Free plan LinuxWindows

    FreeRTOS combines embedded operating-system features with wide architecture support and a two-year LTS maintenance period. Its listed plan is free under the MIT license.

    7.2 Free plan Visit site
  6. 6

    Micrium OS

    Free plan LinuxMacWindows
    6.1 Free plan Visit site
  7. 7

    Particle Device OS

    Free plan Web
    6.0 Free plan · paid from $299/mo Visit site
  8. 8

    VxWorks

    Free plan LinuxWindows
    6.0 Free plan Visit site
  9. 9

    QNX Neutrino RTOS

    Free trial Self-hosted

    Consider QNX Neutrino RTOS for embedded products when its listed processor support and POSIX portability fit your requirements.

    5.5 Pricing on request · 30-day trial Visit site
  10. 10

    PX5 RTOS

    Free trial

    PX5 RTOS combines a small stated footprint, predictable real-time processing and certifications for safety-critical applications.

    5.4 Pricing on request Visit site
  11. 11

    RT-Thread

    Free plan
    5.3 Free plan Visit site
  12. 12

    TencentOS Tiny

    Free plan
    5.3 Free plan Visit site
  13. 13

    Azure Sphere OS

    Paid Web

    The Azure Sphere solution combines the operating system license, certified MCU, and security service access.

    4.7 Visit site
  14. 14

    PikeOS

    Paid LinuxWindows

    Choose PikeOS if its listed platforms, device operating systems, protocols and over-the-air updates fit your edge deployment.

    4.3 Pricing on request Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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