VMware vs Nutanix vs Proxmox

Overview

This comparison covers three major virtualization platforms used in enterprise and SMB environments. Each takes a different approach to licensing, architecture, and ecosystem integration.

Pricing

Pricing is the single most changed factor in the virtualization market in 2025-2026. Broadcom’s acquisition of VMware fundamentally reshuffled the cost landscape, making Nutanix comparatively more attractive despite its higher per-core list price.

VMware (post-Broadcom, 2026)

After the Broadcom acquisition, VMware moved to a subscription-only, per-core licensing model. Perpetual licenses were discontinued. The product line was consolidated:

Licensing rules:

• Per physical core, 16-core minimum per CPU socket
• 72-core minimum per new order
• Annual true-ups required; cores added during the year are charged at list price unless negotiated otherwise
• All cores in a cluster must be licensed at the same tier (VCF or VVF)

Example: 2-socket server, 64 cores total

• VVF (if you don’t need vSAN/NSX): 64 cores x $48 = **$3,072/year**
• VCF (full bundle): 64 cores x $140 = **$8,960/year** (list price, before discounts)
• VCF renewal quotes from Broadcom have been reported at $169-240/core/year, which would put actual renewals at $10,816-15,360/year per server

Important caveats:

• VCF includes vSAN storage only up to 1 TiB per licensed core (64 cores = 64 TiB vSAN capacity). Additional vSAN capacity must be purchased separately.
• NSX microsegmentation, previously included in VCF, is now a paid add-on. This is a significant hidden cost for security-focused deployments.
• Aria automation and advanced operations capabilities that were previously tiered are now bundled into VCF – you pay for them whether you use them or not.
• Many organizations report 60% higher costs over a 7-year lifecycle under the new Broadcom model compared to pre-acquisition pricing.

Nutanix NCI (2026)

Nutanix are sold per physical CPU core. A key architectural difference: the AHV hypervisor is included at no extra cost, eliminating a separate hypervisor licensing line entirely.

What you do NOT need to buy separately (unlike VMware):

• Hypervisor: AHV included free
• Storage software: Nutanix Distributed Storage Fabric included
• Microsegmentation: Flow Security included in Pro and above
• Management: Prism Central included
• DR replication: NearSync replication included in Pro

Example: 2-socket server, 64 cores total

• NCI Pro: 64 cores x $1,000 = **$64,000/year** (includes hypervisor + storage + microsegmentation + management)

At first glance, this is 7x more expensive than VMware VVF ($3,072) and 5x more than VMware VCF list ($8,960). However, this comparison is misleading without context:

1. VMware VVF ($3,072) does NOT include vSAN storage, NSX networking, or microsegmentation. Adding these pushes you to VCF or requires separate licenses.
2. VMware VCF list price (~$8,960) does NOT include NSX microsegmentation (now a paid add-on) or Aria automation. Realistic VCF + NSX add-on runs $180-250/core/year at list, or $11,520-16,000/year per server.
3. At actual renewal prices reported by users, VCF can reach $169-240/core/year ($10,816-15,360/year per server).

The TCO reality (3-year, 1000-core mixed estate, based on industry advisory data):

Bottom line on Nutanix cost: The per-core list price is higher than VMware VVF, but the 3-year TCO is typically 30-60% lower than actual VMware VCF renewal pricing when comparing like-for-like capabilities (hypervisor + storage + microsegmentation + management). Nutanix’s pricing is also more predictable: multi-year commitments lock in rates, whereas Broadcom renewal pricing has been volatile and reportedly 60% higher than pre-acquisition costs.

Proxmox VE (2026)

Proxmox VE is free and open source (AGPLv3). The software itself costs nothing. Optional subscriptions provide access to the enterprise repository and vendor support.

A 2-socket server: €0 for the software, or €740-€2,200/year for full vendor support (Standard/Premium per socket). This is the most cost-effective option by a wide margin.

Cost Summary

Features

Virtualization

Storage

Networking

Internal Firewall and Microsegmentation

All three platforms can enforce firewall rules between VMs on the same host or across the cluster (east-west traffic), but the approach and maturity differ significantly.

VMware vSphere – NSX Distributed Firewall

VMware provides the most mature microsegmentation solution through NSX Distributed Firewall (DFW). Rules are enforced at the VM kernel level (vNIC), providing true zero-trust segmentation.

Key capabilities:

• Security Groups: dynamic VM membership based on tags, names, OS, attributes
• Distributed Firewall: L2/L3/L4 rules, thousands of rules per host
• Identity-based policies (integration with Active Directory)
• Service Insertion (third-party IPS/IPS integration)
• Distributed IDS/IPS (NSX Intelligence)

Ansible automation: The ansible-for-nsxt community collection provides modules for NSX-T/NSX security groups and firewall rules. Alternatively, the REST API can be used directly via the uri module.

- name: Create NSX Security Group
  community.vmware.nsx_security_group:
    hostname: "{{ nsx_manager }}"
    username: "{{ nsx_user }}"
    password: "{{ nsx_pass }}"
    display_name: web-servers
    members:
      - display_name: web-vm-01
      - display_name: web-vm-02
    state: present

- name: Create NSX DFW rule
  community.vmware.nsx_policy_group:
    hostname: "{{ nsx_manager }}"
    ...

Note: NSX is a separate product with its own licensing. It is not included in vSphere Standard or vSphere Foundation licenses.

Nutanix AHV – Flow Network Security

Nutanix Flow Network Security is included with NCI at no extra cost. It provides microsegmentation through category-based policies, enforced at the OVS bridge level on each AHV host.

Key capabilities:

• Categories: group VMs by AppType, AppTier, Location, Group (key-value pairs)
• Application Policies: 5-tuple allow rules between categories
• Isolation Policies: deny traffic between categories (multi-tenant separation)
• Quarantine Policies: block all traffic to/from specific VMs (forensic mode available)
• VDI Policies: identity-based firewall based on Active Directory groups
• Flow NG (Next Generation): multiple security policies per VM (FNS >= 4.0.1)

Ansible automation: As of 2026, the official nutanix.ncp Ansible collection does not include dedicated modules for Flow security policies. Automation is done via the Prism Central REST API (v4) using the uri module or the Python SDK.

- name: Create Flow security policy via REST API
  ansible.builtin.uri:
    url: "https://{{ prism_central }}:9440/api/vmm/v4.0/iaas/security-policies"
    method: POST
    headers:
      Content-Type: application/json
    body_format: json
    body:
      name: web-tier-policy
      rules:
        - srcCategory: AppType:Web
          dstCategory: AppType:Database
          action: ALLOW
          protocol: TCP
          ports: [5432]
    user: "{{ prism_user }}"
    password: "{{ prism_pass }}"
    force_basic_auth: true
    validate_certs: false
    status_code: [200, 201]

Proxmox VE – Built-in Firewall

Proxmox includes a built-in distributed firewall with per-VM rule enforcement. It supports security groups (reusable rule sets defined at cluster level) and can filter traffic at host, VM, and VNet (SDN) levels.

Key capabilities:

• Security Groups: reusable rule sets at cluster level, applied to any VM
• Per-VM firewall rules (IN/OUT direction)
• Per-host firewall rules
• IP Sets and Aliases for grouping IPs
• VNet-level rules (with nftables-based firewall, tech preview)
• Anti-spoofing (IP filter per VM interface)

Ansible automation: The community.proxmox collection includes the proxmox_firewall module for managing firewall rules and security groups.

- name: Create Proxmox security group
  community.general.proxmox_firewall_group:
    api_host: "{{ proxmox_host }}"
    api_user: "{{ proxmox_user }}"
    api_token_id: "{{ token_id }}"
    api_token_secret: "{{ token_secret }}"
    name: web-servers
    comment: "Web server ingress rules"
    rules:
      - type: in
        action: ACCEPT
        proto: tcp
        dport: "80,443"
        source: "+web-sources"
        comment: "Allow HTTP/HTTPS"
    state: present

- name: Apply security group to a VM
  community.general.proxmox_firewall:
    api_host: "{{ proxmox_host }}"
    api_user: "{{ proxmox_user }}"
    api_token_id: "{{ token_id }}"
    api_token_secret: "{{ token_secret }}"
    vmid: 100
    rules:
      - type: in
        action: GROUP
        group: web-servers
    enable: true
    state: present

Summary

Bottom line: If microsegmentation is a priority and budget allows, VMware NSX is the most complete solution. Nutanix Flow offers the best balance of capability and cost (included with NCI). Proxmox’s firewall is functional for basic segmentation but lacks true microsemantics – it is IP/port-based rather than identity or category-based. All three are API-configurable; Ansible support is strongest for Proxmox and VMware, while Nutanix Flow requires direct REST API calls.

API and Automation

REST API

Ansible Integration

Example: VM provisioning with Ansible

VMware (vmware.vmware_rest):

- name: Create VM on vSphere
  vmware.vmware_rest.vcenter_vm:
    vcenter_hostname: "{{ vcenter_host }}"
    vcenter_username: "{{ vcenter_user }}"
    vcenter_password: "{{ vcenter_pass }}"
    name: my-vm
    guest_OS: UBUNTU_64
    placement:
      cluster: "{{ cluster_name }}"
      datastore: "{{ datastore_name }}"
    hardware_version: VMX_20
    memory:
      size_MiB: 4096
    disks:
      - type: SCSI
        new_vmdk:
          capacity: 53687091200
    nics:
      - backing:
          type: STANDARD_PORTGROUP
          network: "{{ network_name }}"
    state: present

Nutanix (nutanix.ncp):

- name: Create VM on Nutanix AHV
  nutanix.ncp.ntnx_vms:
    nutanix_host: "{{ prism_host }}"
    nutanix_username: "{{ prism_user }}"
    nutanix_password: "{{ prism_pass }}"
    name: my-vm
    cluster:
      name: "{{ cluster_name }}"
    vcpus: 2
    cores_per_vcpu: 1
    memory_mb: 4096
    disks:
      - disk_size_bytes: 53687091200
        device_properties:
          device_type: DISK
          disk_address:
            adapter_type: SCSI
            device_index: 0
    nics:
      - subnet:
          name: "{{ subnet_name }}"
    state: present

Proxmox (community.proxmox):

- name: Create VM on Proxmox
  community.general.proxmox_kvm:
    api_host: "{{ proxmox_host }}"
    api_user: "{{ proxmox_user }}"
    api_token_id: "{{ token_id }}"
    api_token_secret: "{{ token_secret }}"
    name: my-vm
    node: "{{ proxmox_node }}"
    cores: 2
    memory: 4096
    scsi:
      scsi0: "local-lvm:50,format=qcow2"
    net:
      net0: "virtio,bridge=vmbr0"
    onboot: true
    state: present

Other Automation Tools

Ecosystem and Integrations

Strengths and Weaknesses

VMware vSphere

Strengths:

• Industry standard with the largest ecosystem
• Most mature feature set (vMotion, DRS, HA, FT)
• Extensive third-party integrations (backup, monitoring, security)
• Largest talent pool and certification ecosystem
• Broadest hardware compatibility (HCL)

Weaknesses:

• Highest cost, especially after Broadcom acquisition
• Complex licensing with forced bundling into VCF
• Perpetual licenses discontinued
• Vendor lock-in risk

Nutanix AHV

Strengths:

• Hyperconverged infrastructure (compute + storage + virtualization in one)
• AHV included free with NCI license (no separate hypervisor cost)
• Modern REST API (v4) with official SDKs and Ansible collection
• Strong VMware migration tooling (Nutanix Move)
• Built-in storage (DSF) with dedup, compression, erasure coding
• Named Leader in Gartner Magic Quadrant for DHI

Weaknesses:

• Highest overall cost (per-core pricing)
• Requires Nutanix hardware or certified HCL
• Smaller ecosystem than VMware
• NSX-T not supported (must use Flow Networking)
• Less mature for edge/ROBO deployments

Proxmox VE

Strengths:

• Free and open source (AGPLv3)
• Very low cost even with vendor support
• Built-in LXC containers alongside KVM VMs
• Flexible storage (Ceph, ZFS, NFS, iSCSI, LVM)
• Active community, good documentation
• Proxmox Backup Server included
• No vendor lock-in

Weaknesses:

• Smaller enterprise ecosystem
• Community Ansible collection (not officially supported by Proxmox)
• Fewer enterprise support options
• Less mature HA and DRS compared to VMware
• No native cloud bridge (NC2 equivalent)
• Limited official training/certification

Verdict

Related Pages

• Vmware
• Nutanix
• Proxmox