Windows Server 2019 Alternatives

FreeNAS is a storage operating system strong and robust enough to meet the needs of enterprise level businesses.

OpenMediaVault is the next generation network attached storage (NAS) solution based on Debian Linux.

Simplicity. Flexibility. Scalability. Modularity. Unraid empowers you to build the system you’ve always wanted using your preferred hardware, software, and operating systems.

VMware vSAN is radically simple, enterprise-class software-defined storage powering VMware hyper-converged infrastructure. 

Secure, fast and economically scalable, Ubuntu helps you make the most of your infrastructure. Whether you want to deploy a cloud or a web farm, Ubuntu Server supports the most popular hardware and software.

File Sharing, OS & Utilities, and Security & Privacy

Rockstor is a free and open source NAS (Network Attached Storage) operating system.

NetApp HCI and SolidFire bring together the best of the public cloud and the private cloud to create a seamless user experience and to help you build a true hybrid multi cloud experience.

Simplify your IT with HPE Simplivity hyper converged infrastructure, your all-in one management solution for hybrid cloud and VM efficiency, scalability.

A backup program for disk arrays. It stores parity information of your data and it recovers from up to six disk failures.

Being a Software-Defined Storage (SDS) solution, StarWind Virtual SAN (VSAN) eliminates any need for physical shared storage and delivers high performance.

Enterprise Storage OS. An open source, high performance, block-level storage platform.

Huawei’s FusionCube hyper-converged infrastructure has compute, storage, network, virtualization, and management in one tightly integrated package.