Use Cases and Deployment Scope
We are using Zerto for disaster recovery, special in cases where a very low RPO is required. This is mostly from VMware to VMware. This what Zerto can do very well. We also use Zerto for migrations from (mostly) Hyper V to VMware. Zerto can manage as one of the few to do this from Hyper V to VMware whitout to much trouble. A very good part is in this case is also the there is a 'provider' part but also a customer part and the customer can do it's own migrations en (test) fail-overs.
Other Software Used
VMware vCenter, VMware Cloud Director, Hyper-V