Open virtualization, affordable and predictable
For many environments, Proxmox VE is a production-ready, open-source alternative. COCUS migrates your virtualization in five phases, with a pilot and a fallback plan.
The starting point
Why is open virtualization worth it?
More control
Open, European technologies create transparency and reduce long-term dependencies.
Up to 80% cost advantage
Open virtualization enables lower platform costs while creating long-term predictability.
Flexible architecture
Virtualization, containers, storage and backup can be shaped to fit your own IT landscape.
Technology
What does Proxmox VE offer?
Proxmox VE combines virtual machines, containers, high availability, software-defined storage and central management in one open platform.
Up to 80% lower ongoing costs through a transparent support and licensing model.*
KVM/QEMU for virtual machines and native support for LXC containers.
Clustering, live migration and automated failover for high availability.
Ceph and ZFS as well as centralized data backup with Proxmox Backup Server.
Open technology platform with professional vendor support.
*Example calculation: 3 hosts with 2 CPUs and 16 cores each.
Process
How does the migration to Proxmox VE work?
COCUS analyzes the existing infrastructure, develops the appropriate target architecture and migrates systems in a controlled five phase process.
Analysis
Recording of systems, applications, dependencies, hardware and existing requirements.
Design
Concept for compute, storage, network, backup, security and support.
Pilot
Building a test cluster and migrating selected systems, including restore and failover tests.
Migration in waves
Step by step migration of workloads with defined approval points and backup options.
Operations
Monitoring, updates, documentation and optional Managed Services by COCUS.
Why COCUS
Why COCUS for open virtualization?
Individual assessment
We analyse existing systems, dependencies and requirements, and develop the right target architecture from them.
Operations included
On request, we take care of monitoring, updates, support and ongoing operations as a Managed Service.
Infrastructure, network and security from a single source
COCUS combines Proxmox with comprehensive expertise in IT infrastructure, connectivity and IT security.
30+ Proxmox implementations
COCUS has successfully implemented more than 30 Proxmox environments and transitioned them into production.
FAQ
Frequently asked questions
Yes. Proxmox VE is an open source platform developed by Proxmox Server Solutions GmbH in Vienna. The current version 9.2 is based on Debian 13 and is expected to be maintained until at least 2030. For business critical systems, 24/7 support is available.
Yes, in several respects. Proxmox VE is fully open source (AGPLv3), with development and support based in Europe. There are no license keys that expire, so your environment continues to run even without a subscription. And because Proxmox is built on open technologies such as KVM, Ceph and ZFS, you are not tied to a single vendor.
The software is free and functionally identical across all subscription levels. The paid subscription is priced per CPU socket and year: Basic €370, Standard €550 and Premium €1,100 (net, as of September 2026). The number of CPU cores does not affect the price.
The software itself is free and all features are included. Costs arise from the support subscription per CPU socket, migration and training, and potentially backup storage. These costs are predictable and are fully accounted for during the exit check.
Your servers continue to run without restrictions. The subscription provides vendor support and access to the Enterprise Repository. Without it, updates remain available via the public repository.
Windows VMs run on Proxmox VE. Before migration, VirtIO drivers are installed and network configurations documented to ensure everything works smoothly after the switch.
We clarify this with the software vendor in advance. Critical systems are migrated last or temporarily remain on VMware in a hybrid setup.
Proxmox Backup Server provides incremental, deduplicated and encrypted backups. Alternatively, we check whether your existing backup solution supports Proxmox.
Yes. Many companies start with test, DR or branch environments, or deploy new workloads on Proxmox and migrate existing systems during the next hardware refresh.
Proxmox VE scales from single servers to large clusters with Ceph storage. Multiple clusters and sites can be centrally managed with Proxmox Datacenter Manager, including live migration between clusters.
Start with an honest cost comparison
We calculate with your real core and socket numbers and tell you whether the switch is worth it. No obligation.
- Cost comparison based on your real numbers
- Assessment of critical systems and dependencies
- Recommendation for the right migration path
Data Customer Engagement