Dell EMC UnityVSA is described as 'lets you deploy Dell EMC Unity unified storage as a virtual storage appliance. Dell EMC UnityVSA is software-defined storage that runs on industry-standard hardware and VMware ESXi, which you supply'. There are more than 10 alternatives to Dell EMC UnityVSA for a variety of platforms, including Linux, VMware vSphere Hypervisor, Microsoft Hyper-V Server, Windows and VMware vSphere. The best alternative is StorPool. It's not free, so if you're looking for a free alternative, you could try PetaSAN or Open-E Data Storage Software SOHO. Other great apps like Dell EMC UnityVSA are StoneFly SCVM™ (Paid), LINBIT VSAN (Paid), vSAN (Paid) and Starwind Virtual SAN (Freemium).
StorPool is an intelligent software-defined storage solution that allows service providers, enterprises and other Cloud builders to run data storage on standard x86 servers, instead of on expensive and inefficient storage arrays (SANs).
PetaSAN is an open source Scale-Out SAN solution offering massive scalability and performance. PetaSAN uses modern cloud based technologies to provide the elasticity and agility to scale up the storage cluster simply by adding more nodes.
LINBIT® VSAN SDS for VMware is a software defined storage solution for small and medium-sized VMware® deployments. It is also usable on an Oracle VM Server for x86 installation or any other Hypervisor software.
Open-E Data Storage Software V7 SOHO (Small Office Home Office) is a free version of Open-E DSS V7, previously known as Open-E DSS V7 Lite. With SOHO, you can take advantage of basic functionalities of our fully featured NAS / SAN software platform
StarWind VSAN eliminates any need in physical shared storage by simply mirroring internal hard disks and flash between hypervisor servers. It maintains high performance and data high availability on minimalistic resources.