Rubrik is described as 'delivers instant application availability for recovery, search, cloud, and development. Hybrid cloud enterprises mobilize applications, automate protection policies, recover from Ransomware, search and analyze at scale on one platform' and is an website in the Backup & Sync category. There are three alternatives to Rubrik, not only websites but also apps for a variety of platforms, including Linux, Microsoft Hyper-V Server, VMware vSphere Hypervisor, Windows and Red Hat. The best alternative is Veeam Backup, which is free. Other great sites and apps similar to Rubrik are Retrospect (Paid) and StorPool (Paid).
Retrospect is a multi-platform backup solution supporting hybrid backup to disk, tape, NAS & Cloud, aimed at SMEs and MSPs. Main Editions include unlimited client/endpoint licenses. Site License Edition includes unlimited server licenses.
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).