Best Free Network Attached Storage (NAS) Software of 2025

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.

In the absence of a file system, all information stored in a medium would appear as a single, unbroken mass of data, making it impossible to discern where one piece of information ends and another begins. By organizing the data into discrete units and assigning each a unique identifier, the information can be easily accessed and recognized. This method of categorization mirrors traditional paper-based systems, where each collection of data is referred to as a "file." The framework and set of rules that govern the organization and naming of these data groups is known as a "file system." Network-attached storage (NAS) serves as a file-level data storage solution connected to a network, allowing diverse clients to access data seamlessly. NAS is specifically engineered to deliver file services through its hardware, software, or configuration, often taking the form of a dedicated computer appliance designed for this singular purpose. Consequently, NAS systems enhance the efficiency of file management across various devices and platforms.

XigmaNAS is a versatile operating system that can be deployed on nearly any hardware configuration to facilitate the sharing of data storage across a computer network. The term ‘NAS’ stands for “Network-Attached Storage.” This platform provides a straightforward and efficient solution for establishing a centralized server that is easily accessible for various types of data via multiple network protocols. XigmaNAS is compatible with Windows, Apple, and UNIX-like systems, enhancing its utility for diverse environments. It comes equipped with features such as ZFS v5000, Software RAID (0,1,5), disk encryption, and S.M.A.R.T / email notifications, supporting protocols like CIFS/SMB (Samba), FTP, NFS, and many others. Configuration is highly customizable through its user-friendly web interface, making it accessible to users of all technical levels. Furthermore, users have the option to install XigmaNAS on Compact Flash, USB keys, SSDs, or traditional hard drives, or even run it from a LiveCD/LiveUSB setup, providing flexibility in installation methods. This adaptability makes XigmaNAS an excellent choice for anyone looking to optimize their data storage and sharing capabilities.

TurnKey File Server is a user-friendly solution that integrates Windows-compatible network file sharing with an intuitive web-based file management system. It supports a variety of file transfer protocols including SMB, SFTP, NFS, WebDAV, and rsync, making it versatile for different networking needs. Users of the server can effectively organize and manage their files within designated private or public storage areas. Built on the robust foundations of Samba and WebDAV CGI, this file server offers both functionality and ease of use, ensuring that managing files is a seamless experience for everyone involved. Additionally, its comprehensive support for various protocols enhances its capability to serve diverse file-sharing requirements across different platforms.

MayaNAS Cloud offers a comprehensive enterprise-level software-defined storage solution that delivers exceptional performance and throughput for file storage utilizing standard object storage (S3) without requiring extra resources. This solution is entirely software-based, enabling file storage compatibility via NFS, SMB-AD, and providing robust block services through NVMeoF, iSCSI, and FC connections. Key features include a two-node high-availability setup, compression, thin provisioning, an unlimited number of policy-driven snapshots, and continuous replication capabilities. Moreover, MayaNAS is accessible as a marketplace solution across prominent public clouds like AWS, GCP, and Azure, and it can also be installed on-premises via an ISO image for bare metal setups. Additionally, the versatility of MayaNAS makes it an ideal choice for organizations looking to optimize their storage infrastructure in various environments.