Compare the Top Operating Systems for Windows as of April 2025

What are Operating Systems for Windows?

Operating systems (OS) are the base software layer on any computer, smartphone, server, or computing system. Operating systems manage all aspects of a computing system including applications, software, and hardware. Compare and read user reviews of the best Operating Systems for Windows currently available using the table below. This list is updated regularly.

  • 1
    DragonFly BSD

    DragonFly BSD

    DragonFly BSD

    DragonFly version 6.2.2 is released. The 6.2 series has hardware support for type-2 hypervisors with NVMM, an amdgpu driver, the experimental ability to remote-mount HAMMER2 volumes, and many other changes. DragonFly belongs to the same class of operating systems as other BSD-derived systems and Linux. It is based on the same UNIX ideals and APIs and shares ancestor code with other BSD operating systems. DragonFly provides an opportunity for the BSD base to grow in an entirely different direction from the one taken in the FreeBSD, NetBSD, and OpenBSD series. DragonFly includes many useful features that differentiate it from other operating systems in the same class. The most prominent one is HAMMER, our modern high-performance filesystem with built-in mirroring and historic access functionality. Virtual kernels provide the ability to run a full-blown kernel as a user process for the purpose of managing resources or for accelerated kernel development and debugging.
    Starting Price: Free
  • 2
    Mbed OS
    Arm Mbed OS is a free, open-source IoT operating system that includes all the necessary features to develop IoT products. The OS includes everything you need to develop smart, connected products on Arm Cortex-M based hardware, including machine learning capabilities, security, connectivity stacks, an RTOS kernel and drivers for sensors and I/O devices. Arm Mbed OS is designed for the Internet of Things. It is integrated with connectivity, machine learning, networking, and security stacks and is supported with software libraries, development hardware, tutorials and examples. From hardware to the cloud, Mbed OS supports more than 70 silicon, module, cloud, and OEM partners, optimizing your developer choice. By using the Mbed OS API, your application code can remain clean, portable, and simple, while taking advantage of security, communications and machine learning. The integrated solution reduces development cost, time, and risk.
  • 3
    Pavilion HyperOS
    Powering the most performant, dense, scalable, and flexible storage platform in the universe. Pavilion HyperParallel File System™ provides the ability to scale across an unlimited number of Pavilion HyperParallel Flash Arrays™, providing 1.2 TB/s read, and 900 GB/s write bandwidth with 200M IOPS at 25µs latency per rack. Uniquely capable of providing independent, linear scalability of both capacity and performance, the Pavilion HyperOS 3 now provides global namespace support for both NFS and S3, enabling unlimited, linear scale across an unlimited number of Pavilion HyperParallel Flash Array systems. Take advantage of the power of the Pavilion HyperParallel Flash Array to enjoy unrivaled levels of performance and availability. The Pavilion HyperOS includes patent-pending technology to ensure that your data is always available, with performant access that legacy arrays cannot match.
  • 4
    Urbit

    Urbit

    Urbit

    Urbit is for everyone, but sometimes it is easy to get lost in this universe. Follow these links to contribute to the network through developing, operating, and exploring. It solves the hard problems of implementing a peer-to-peer network (including identity, NAT traversal, and exactly-once delivery) in the kernel so app developers can focus on business logic. The entire OS is a single pure function that provides application developers with strong guarantees: automated persistence and memory management, repeatable builds, and support for hot code reloading. The connected world anticipated by Urbit is a much friendlier one, much like the early Internet, where collegial discussion and collaboration was the norm. Problems that are unsolvable without large-scale political centralization in our current internet – data breaches, spam, fake reviews, malware-spreading, harassment – become tractable when individuals control their computing again. You have one login for everything.
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