Proxmox Backup Server Subscription provides Enterprise Repository access and a complete backup and data protection platform for securely backing up Proxmox VE virtual machines, containers, and other supported data. All subscription tiers provide the full Proxmox Backup Server feature set, including unlimited backup storage and clients, while the main difference between tiers is the level of professional technical support and response time provided by Proxmox. Community includes Enterprise Repository access and public community forum support without Proxmox enterprise ticket support; Basic includes 5 support tickets per year with a 1 business day response time; Standard includes 15 support tickets per year, a 4-hour response time for critical requests, and remote SSH support; Premium provides unlimited support tickets, a 2-hour critical response time, and remote SSH support for organizations requiring the highest level of Proxmox technical assistance. Subscriptions are licensed per Proxmox Backup Server, making the appropriate tier suitable for everything from small business backup infrastructure to production, mission-critical, and enterprise backup environments.