TrueNAS (formerly FreeNAS) is a family of network-attached storage (NAS) products produced by iXsystems, incorporating both open-source and commercial software.

TrueNAS can be used on many network clients, including Windows, macOS and Unix, and is compatible with virtualization hosts such as XCP-NG, XenServer and VMware.

Networking protocols supported by TrueNAS include SMB, AFP, NFS, iSCSI, SSH, rsync and FTP/TFTP.

[2][3][4][5][6][7] The TrueNAS project originated as FreeNAS, created by Olivier Cochard-Labbé in October 2005, based on the m0n0wall firewall and FreeBSD 6.0.

The reimplementation of FreeNAS with version 8.0 transitioned the project onto a new architecture based on FreeBSD's NanoBSD embedded build system, Python, Django, and the dōjō toolkit.