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 25 alternatives to TrueNAS for a variety of platforms, including Linux, Windows, Self-Hosted, Mac and Android 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.
TrueNAS alternatives are mainly NAS Systems, but if you're looking for
Operating Systems or Virtualization Tools you can filter on that. Other popular filters include
Open Source and
Linux. You can also filter by region, for example
EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to TrueNAS.