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Virtualisation migration
From
VMware vSphere
→
To
Proxmox VE

VMware to Proxmox migration — UK SME + mid-market programme

For UK SMEs and mid-market organisations hit hardest by Broadcom's VMware price uplifts, Proxmox VE is increasingly the pragmatic destination — an open-source KVM hypervisor with mature commercial support, no per-socket / per-core licence model, and full feature parity for typical workloads. Servnet runs end-to-end VMware-to-Proxmox migrations including hardware sizing, optional commercial subscription, training and 90-day hypercare.

Vendor migration programme — VMware vSphere source on the left, Proxmox VE target on the right, with parallel-running data streams converging through a central Servnet cutover hub.
From → To: VMware vSphere vs Proxmox VE
CURRENTVMware vSphereProduction workloadsLegacy management planeRenewal due / EoSServnetparallel-running migrationTARGETProxmox VEProduction workloadsModern management planeStrategic 5-yr position
Typical outcomes

What good looks like after a VMware vSphere → Proxmox VE migration

5-yr TCO
−50%

Typical reduction vs VCF renewal for a 50-VM SME estate excluding hardware.

Migration window
8-14 wk

End-to-end for a 50-150 VM estate including parallel pilot + phased cutover.

Production downtime
10-20 min

Per VM, using virt-v2v or vmdk-to-qcow2 conversion via shared NFS staging.

Operational burden
Comparable

Proxmox GUI + cluster operations are functionally equivalent to vCenter for typical SME workflows.

The why

Why UK organisations migrate from VMware vSphere to Proxmox VE

  • ✓Eliminate VMware licensing entirely — Proxmox is open source
  • ✓Optional Proxmox commercial subscription (€110-€880/socket/year) for enterprise repos + support
  • ✓Mature features: HA, live migration, snapshots, replication, GUI cluster management
  • ✓Lower hardware spend — Proxmox runs on commodity x86 without HCL constraints
  • ✓Built-in backup (Proxmox Backup Server) at no extra licence cost
  • ✓Reduce 5-year TCO by 40-60% vs equivalent VCF renewal in typical SME estates
How we run it

Migration phasing — typical VMware vSphere → Proxmox VE programme

VMware vSphere → Proxmox VE — programme timeline
W0W2W4W6W8W10W12W14Discovery + Proxmox sizing3wProxmox cluster build3wPilot wave (5-10 VMs)2wPhased production cutover4wVMware decommission2wTotal programme: 14 weeks · parallel running throughout
  1. 1

    Discovery + Proxmox sizing

    Weeks 1-3

    VMware estate fingerprint; sized Proxmox cluster recommendation (typically 3 or 5 node); Proxmox Backup Server sizing; networking + storage design (Ceph vs ZFS vs shared NFS).

  2. 2

    Proxmox cluster build

    Weeks 4-6

    Hardware delivery (any commodity x86 — Dell, HPE, Lenovo, Supermicro all work); Proxmox installation; cluster + storage configuration; Proxmox Backup Server deployment.

  3. 3

    Pilot wave (5-10 VMs)

    Weeks 7-8

    Non-production VMs converted via virt-v2v; functional + performance validation; operational handover with internal Linux/sysadmin team.

  4. 4

    Phased production cutover

    Weeks 9-12

    Workload waves grouped by app criticality; runbook per wave; user acceptance sign-off.

  5. 5

    VMware decommission

    Weeks 13-14

    Final VMs migrated; VMware licences cancelled (huge year-2 saving); hardware repurposed or sold.

Included in scope

What Servnet delivers in a VMware vSphere → Proxmox VE migration

virt-v2v conversion tooling

Open-source — we configure source / target connections and orchestrate wave migrations.

Hardware procurement

Proxmox runs on commodity x86 — we quote across Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem, Supermicro at vendor-direct pricing.

Proxmox commercial subscription (optional)

Enterprise-grade repos + commercial support — €110/socket/year (Community), up to €880/socket/year (Premium). Cancellable annually.

Proxmox Backup Server

Free, integrated, deduplicated backup — we size + deploy alongside the cluster.

Training for ops team

Workshop sessions on Proxmox CLI + GUI + cluster operations + Backup Server.

Post-migration support

90-day hypercare with named engineer; optional ongoing managed services for SMEs without in-house Linux skills.

De-risking the cutover

Top risks + how we mitigate them

⚠️ Internal team has no Linux / KVM experience
Training included; 90-day hypercare; optional ongoing managed services. Realistically, Proxmox is best suited to teams with at least one Linux-comfortable engineer.
⚠️ Commercial support is less heavyweight than VMware
For SMEs, Proxmox commercial support is more than sufficient — UK time-zone response, validated production releases. For very large or compliance-sensitive estates, Nutanix / Azure Stack HCI may be a better fit.
⚠️ Specific VMware features (DRS, NSX, SRM) have no Proxmox equivalent
Proxmox HA + replication cover most use cases; for advanced networking, Open vSwitch or SDN add-ons cover most needs. Discovery phase catalogues every VMware feature in use and maps each to a Proxmox equivalent (or surfaces the gap honestly).
⚠️ Compliance / cyber-insurance questions about open source
Proxmox Server Solutions GmbH (Austria) is a recognised commercial vendor providing audited releases + UK-time-zone support. For Cyber Essentials, ISO 27001, SOC 2 — Proxmox is no different from any other supported infrastructure platform.
Pricing guide rail

Indicative: VMware → Proxmox migrations for a 50-VM SME estate typically run £18k-£35k professional services (excluding hardware + optional subscription). Most customers cancel VMware in year 2 — eliminating the largest line item entirely. Talk to us for a sized commercial proposal that models 5-year TCO honestly against your existing VMware position.

Frequently asked

FAQs — VMware vSphere → Proxmox VE

Is Proxmox really enterprise-ready?

Yes for SMEs and most mid-market workloads — Proxmox runs production estates at every UK organisation type we serve, including some with hundreds of VMs and strict uptime SLAs. For very large enterprise estates (1,000+ VMs, complex SAN integration, strict compliance), Nutanix or Azure Stack HCI may still be a better fit — discovery phase establishes the right destination honestly.

What about backups?

Proxmox Backup Server is included free — deduplicated, encrypted, with native Proxmox VE integration. For larger estates or specific compliance needs, Veeam also supports Proxmox.

Can we keep running mixed VMware + Proxmox during the migration?

Yes — many customers run a hybrid VMware + Proxmox cluster for 6-12 months while migrating workload-by-workload. Both can sit on the same network and storage backbone with sensible separation.

What about Windows Server + SQL Server licensing?

Windows Server + SQL Server are licensed per-VM (or per-host with SA + Datacenter) regardless of hypervisor. Proxmox is fully Microsoft-supported for Windows guests; SQL Server, Exchange, AD all run as on any other KVM platform.

Go deeper

Ready to scope your VMware vSphere → Proxmox VE migration?

30-minute discovery call with an engineer who's run this migration before. Honest scoping, no sales script.

Book a scoping call →