Compare the Top On-Premises Network Attached Storage (NAS) Software as of March 2026

What is On-Premises Network Attached Storage (NAS) Software?

Network-attached storage (NAS) software, also known as network-attached storage operating systems or NAS server software, is the software that runs on a network-attached storage device or NAS server. Compare and read user reviews of the best On-Premises Network Attached Storage (NAS) software currently available using the table below. This list is updated regularly.

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    TrueNAS

    TrueNAS

    iXsystems

    TrueNAS is the world's most deployed storage software. TrueNAS is a universal data platform that allows users to easily adopt a modern, open source approach to storing and protecting their growing data. TrueNAS is open source and harnesses the power of the legendary ZFS file system to provide unified storage (File, Block Object, and Apps) with the reliability and performance demanded by virtualization, backup, and many other data-heavy workloads. The TrueNAS CORE edition (formerly FreeNAS) is based on FreeBSD for unified scale-up storage. The TrueNAS SCALE edition is based on Debian Linux for either scale-up or scale-out solutions, and offers Linux Containers, VMs (KVM), and scale-out ZFS storage capabilities. Both are known to work well on standard hardware. Join the millions already using TrueNAS, including the majority of Fortune 500 companies, and experience why TrueNAS is very highly rated for yourself.
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    Starting Price: Free
  • 2
    Windows Server
    Windows Server 2022 introduces advanced multi-layer security, hybrid capabilities with Azure, and a flexible application platform. Elevate the security posture of your organization starting with the operating system. Extend your data center to Azure ​for greater IT efficiency. Empower developers and IT pros with an application platform to build and deploy diverse applications. See how your cost savings will add up on Azure with offers such as Azure hybrid benefit and extended security updates. Modernize your workloads on Azure, the trusted cloud for Windows Server. Connect on-premises Windows Servers to Azure with Azure Arc. Update to the latest operating system for enhanced security, performance and value. Now you can leverage all of the benefits of the cloud with Azure. It’s free to start, so manage your servers, clusters, hyper-converged infrastructure, and Windows 10 PCs with Windows Server.
    Starting Price: $501 one-time payment
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    SoftNAS

    SoftNAS

    Buurst

    SoftNAS is a cloud-native, software-defined, full-featured enterprise cloud NAS filer product line for primary data storage, secondary storage and hybrid cloud data integration. It enables existing applications to securely migrate to and connect with the cloud without re-engineering. With enterprise-class NAS features like: high-availability, deduplication, compression, thin-provisioning, snapshots, replication, cloning, encryption (at rest and in transit), LDAP and Active Directory integration, and support for NFS, CIFS, iSCSI or AFP storage protocols, SoftNAS protects mission-critical and primary, active/hot data, backup/archive data and makes cloud data migration faster and more reliable. SoftNAS offers the broadest range of storage options in terms of price vs. performance and backend storage selection, on-demand at petabyte scale across the AWS and Azure Marketplaces or on-premises on VMware.
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    Unraid

    Unraid

    Unraid

    Unraid OS allows you to have ultimate control over your data, media, applications, and desktops, using just about any combination of hardware. Video producers, streamers with extensive video libraries, media editors, photographers, musicians, and music collectors use Unraid to reduce their initial costs. Start with as few as two drives and scale using one or more drives at a time. Gamers who also have media servers and like to build their own custom systems use Unraid to do everything without losing their edge. Designers, 3D animators, developers, photographers, and other users who require significant storage use Unraid to locally store assets for fast access. Use Apple Time Machine and Windows Backup services to archive large quantities of infrequently accessed data off of your local devices. Software engineers, game development studios, AR/VR designers, and university labs use Unraid to test software on multiple platforms and across operating systems and devices.
    Starting Price: $59 one-time payment
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