Part of Veeam Availability Suite
Veeam ONE licenses are purchased on a perpetual basis with basic or production maintenance, or a subscription license which includes 24x7 Production Support.
Perpetual licenses of Veeam ONE are licensed per CPU socket on hosts with virtual machines (VMs) to be monitored or reported on. A license is required for each occupied motherboard socket as reported by the hypervisor API.
Subscription licenses of Veeam ONE are licensed per VM. There are one- to five-year subscription licenses available, and customers can choose to purchase the entire subscription up front, or pay annually.