TrueNAS is described as '(formerly FreeNAS) is an operating system that can be installed on virtually any hardware platform to share data over a network. TrueNAS is the simplest way to create a centralized and easily accessible place for your data' and is a very popular NAS system in the backup & sync category. There are more than 10 alternatives to TrueNAS for a variety of platforms, including Linux, Windows, Self-Hosted, Mac and VMware vSphere Hypervisor apps. The best TrueNAS alternative is openmediavault, which is both free and Open Source. Other great apps like TrueNAS are XigmaNAS, Unraid, Rockstor and Amahi Home Server.
openmediavault is the next generation network attached storage (NAS) solution based on Debian Linux. It contains services like SSH, (S)FTP, SMB/CIFS, DAAP media server, RSync, BitTorrent client and many more. It can be enhanced via plugins.
Faster and lighter weight than FreeNAS.
XigmaNAS (formerly NAS4Free) is an embedded Open Source Storage NAS (Network-Attached Storage) distribution based on FreeBSD. This project is a continuation of TrueNAS 7 series project.
Flexible operating system combining storage management with support for mixed drive sizes, Docker containers, virtual machines, hardware and GPU passthrough, browser-based interface, file protocols, scalable expansion, integrated parity, and monitoring features.
adding more disks is much easier than freenas. i have implemented it for client.
The Amahi Home Server is designed for home and small office environments where the technical support staff do not want the job!
Western Digital My Cloud is an easy-to-use personal cloud storage device that plugs directly into your Wi-Fi router at home so you can preserve your digital life. Use the My Cloud app on your phone, tablet or computer to access it anywhere without paying a subscription fee.
Not applicable for Independent hardware. More similar to products from QNAP and Synology.
StorMagic SvSAN is a highly available hyperconverged storage solution using only two servers and protects data with encryption features and key management.
It uses openSUSE Leap as a base with the Btrfs advanced file system. EasyNAS is managed through a web-based interface and offers such features as on-line growing of file systems, snapshots and copy-on-write.
A napp-it is a high-quality block- and filestorage on common and favourable server hardware from ex. DataOn, Dell, HP or SuperMicro paired with a solid server OS (preferable Omnios/ OI/ Solaris but now with ZFS and job/ snap management on Linux) with an easy online installer...
Windows Server 2019 is built on the strong foundation of Windows Server 2016 – which continues to see great momentum in customer adoption.
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I use it for over three years now without any major problem. It's based on Debian and very stable. The interface is smooth and all works great. I use OMV for backup, file server, media server (DLNA), downloads (YT and torrent) and it performs and extra virus scan on all my files.