TrueNAS (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.




Comments about TrueNAS as an Alternative to Unraid
Does not have built in functionality of virtual machines and "Docker" apps.

Most users think TrueNAS is a great Unraid alternative.
TrueNAS is the most popular Linux & Self-Hosted alternative to Unraid.
TrueNAS is the most popular Open Source & free alternative to Unraid.
- TrueNAS is Free and Open Source
- TrueNAS is Security-focused









































Since the previous comment, FreeNAS, now called TrueNAS has added support for VMs and Docker apps (though to setup a Docker environment, you must do so manually.) It has support for a plethora of things that competitors such as unraid does, such as plugins (for instance Plex, Nextcloud, Jenkins, and many others), ZFS, NAS, SMB, iSCSI, etc., and a very nice web GUI.