Zerto requires 1 Zerto Virtual Manager (ZVM) to be deployed at both the source and target sites. The ZVM components need to be installed on a (virtual) Windows Server.

Zerto also requires a Virtual Replication Appliance (VRA) as well as a kernel module (provided as vSphere Installation Bundle or VIB) to be deployed on each physical server that is part of a cluster hosting protected VMs (source site) and on each physical server that is used to process and store incoming replication data (target site). The kernel model is used for tapping into the VMs Input/Output (IO) stream.