VM Performance Monitoring Software: 9 Tools That Track CPU Ready, Memory and Datastore Latency

Virtual machines hide their bottlenecks. A guest can report idle CPU while it waits for a physical core, or look healthy while its datastore queues requests. Counters such as CPU ready time, memory ballooning and disk latency only make sense when you read host and guest data side by side. The NIST guidance on information security continuous monitoring (SP 800-137) describes the same principle: define what to measure, collect it on a schedule and act on what the data shows. For hypervisor-specific risks, see NIST SP 800-125 on full virtualization security.

This guide compares nine platforms from SaaSPodium's Network Monitoring Software and Application Performance Management Software catalogs that can watch virtualized estates. Pricing and deployment notes come from our directory data, and we link to vendor pages for current quotes. If you run Hyper-V specifically, read our Hyper-V monitoring software guide too.

Why VM Performance Monitoring Matters

Virtual machines share physical CPU, memory, storage and network, so one busy workload can slow its neighbors without any alert inside the guest. Monitoring at the host and VM level exposes that contention, supports right-sizing and shortens the time to find the real cause of a slowdown.

Consolidation is the reason virtualization saves money, and also the reason problems spread. Fixed-capacity hosts face bursts from backups, patch windows and batch jobs. Without history, teams either overprovision hosts or react after users complain. Good monitoring turns that into a measured decision.

Metrics worth alerting on

• CPU ready or wait time: how long a VM waits for a physical core. Sustained high values mean the host is oversubscribed.
• Memory ballooning and swapping: signs the hypervisor is reclaiming memory from guests under pressure.
• Datastore and virtual disk latency: read and write response times, which usually explain slow applications first.
• Network throughput and drops: per-VM and per-uplink traffic, including packet drops.
• Snapshot age and size: forgotten snapshots degrade disk performance and consume storage.

How We Chose These VM Monitoring Tools

We shortlisted platforms listed in SaaSPodium's directory that document support for virtual infrastructure, then weighed pricing model, deployment style, alerting and fit for different team sizes. Because our directory does not yet hold verified user ratings for these products, we do not rank by score.

Check each vendor's current documentation for the exact hypervisor versions and metrics supported, because coverage changes with releases. Use free trials or free tiers where offered before you commit.

1. ManageEngine OpManager: Network and VM Views in One Console

ManageEngine OpManager combines network, server and virtualization monitoring in a single console, which suits teams that want hosts, VMs and switches on the same dashboard. SaaSPodium lists a freemium pricing model and a tagline of unified network and infrastructure management.

• Directory and vendor link: ManageEngine OpManager
• Architecture: server-based platform with a web console; it polls devices and hypervisors rather than relying on guest agents for every metric.
• Integrations: documented support for VMware and Hyper-V monitoring alongside network devices; confirm supported versions with the vendor.
• Pricing and deployment: freemium entry point per our directory; paid editions scale by device count, so request a current quote.

2. Paessler PRTG Network Monitor: Sensor-Based Monitoring for Smaller Teams

Paessler PRTG Network Monitor uses a sensor model where each metric you track is a configurable sensor, including sensors for virtualization hosts. That makes it easy to start small and add VM checks as the environment grows.

• Directory and vendor link: Paessler PRTG Network Monitor
• Architecture: a core server with remote probes for distributed sites; sensors poll via SNMP, WMI, APIs and other protocols.
• Integrations: vendor documentation covers VMware and Hyper-V sensor types; alerts can go to email, SMS and ticketing tools.
• Pricing and deployment: freemium per our directory; paid licenses are tied to sensor counts, so size your VM checks before buying.

3. ManageEngine Applications Manager: VM Health Tied to Application Performance

ManageEngine Applications Manager approaches virtual machines from the application side, linking hypervisor and guest health to the web applications, databases and middleware running on them. It fits teams that get paged for application slowness first.

• Directory and vendor link: ManageEngine Applications Manager
• Architecture: agentless collection from servers, databases and applications with dependency views.
• Integrations: monitors common virtualization platforms, databases and application servers; verify specific versions in the product documentation.
• Pricing and deployment: paid per our directory; licensing is by monitor count, so quote a realistic number of VMs and apps.

4. LogicMonitor: Collector-Based SaaS for Hybrid Estates

LogicMonitor is a cloud-delivered monitoring platform that uses lightweight collectors inside your network to gather data from hypervisors, hardware and cloud services. It suits hybrid teams and managed service providers who prefer not to run the monitoring server themselves.

• Directory and vendor link: LogicMonitor
• Architecture: SaaS portal plus on-premises collectors that discover and poll resources automatically.
• Integrations: built-in modules for virtualization platforms, network gear and cloud accounts; confirm module coverage for your versions.
• Pricing and deployment: paid, quote-based per our directory; costs scale with monitored resources.

5. Progress WhatsUp Gold: Maps, Alerts and Virtual Host Checks

Progress WhatsUp Gold is a self-hosted monitoring suite known for interactive network maps and flexible alerting, with support for monitoring virtual hosts and guests. It works for mid-size teams that want visual topology next to VM health.

• Directory and vendor link: Progress WhatsUp Gold
• Architecture: Windows-based server with discovery, maps and a dashboard layer.
• Integrations: supports VMware and Hyper-V monitoring per vendor documentation, plus SNMP-based network monitoring.
• Pricing and deployment: freemium entry per our directory; production use needs a licensed edition priced by device count.

6. Zabbix: Open Source Monitoring With VM Templates

Zabbix is a free, open-source monitoring platform with templates for VMware and other virtual infrastructure. It is a strong option when budget is tight and your team can manage configuration, upgrades and the database behind it.

• Directory and vendor link: Zabbix
• Architecture: server, optional proxies and agents backed by a database; highly customizable triggers and dashboards.
• Integrations: official templates exist for VMware monitoring; community templates cover other platforms.
• Pricing and deployment: free software per our directory; you pay in engineering time, and commercial support is available separately.

7. NinjaOne: Endpoint Management With VM Awareness

NinjaOne is a cloud-native remote monitoring and management platform for IT departments and MSPs. It is worth considering when you want VM and host monitoring to sit beside patching, remote access and endpoint management.

• Directory and vendor link: NinjaOne
• Architecture: cloud console with agents on managed devices, plus approaches for hypervisor visibility documented by the vendor.
• Integrations: PSA, ticketing and security tool integrations are part of the platform pitch; check which virtualization metrics are native.
• Pricing and deployment: paid, quote-based per our directory; pricing is typically per managed device.

8. Datadog Network Monitoring: Cloud-Scale Visibility With Agents

Datadog Network Monitoring belongs to the wider Datadog observability platform, which offers integrations for virtualization and cloud services. It suits engineering teams already centralizing metrics, logs and traces in Datadog.

• Directory and vendor link: Datadog Network Monitoring
• Architecture: SaaS backend with agents and integrations that forward metrics from hosts and services.
• Integrations: large integration catalog; confirm the vSphere or other virtualization integration scope for your plan.
• Pricing and deployment: freemium entry per our directory; usage-based pricing can grow with host count and data volume, so model it first.

9. Dynatrace: AI-Assisted Analysis for Large Environments

Dynatrace is an enterprise observability platform that maps dependencies automatically and applies AI-assisted analysis to find probable causes. It is a fit for large organizations where VMs are one layer in a bigger stack.

• Directory and vendor link: Dynatrace
• Architecture: SaaS or managed deployment with OneAgent on hosts and extensions for infrastructure sources.
• Integrations: broad coverage of cloud, containers and applications; verify how VM-level data from your hypervisor is collected.
• Pricing and deployment: paid, quote-based per our directory; evaluate against your host and data volumes.

How to Choose the Right VM Monitoring Tool

Choose by hypervisor coverage first, then by who will operate the tool and how much history you need. A small VMware or Hyper-V shop can start with a freemium tool, while hybrid and multi-cloud teams usually need collectors or agents and longer data retention.

• Confirm hypervisor support: match vSphere, Hyper-V, KVM or Nutanix versions against vendor docs.
• Decide on collection method: agentless polling is simple, agents add guest-level detail.
• Check retention and reporting: capacity planning needs months of history, not days.
• Plan alert routing: connect to your ITSM tool such as IT service management software so alerts become tickets.
• Pilot with real load: run the trial through a backup window or patch cycle.

Also watch the platform itself: our guide to signs your network monitoring tool is failing explains when a monitoring stack has outgrown its design.

Capacity Planning Formula for VM Hosts

Capacity planning for virtualization comes down to the overcommit ratio, which compares virtual resources promised to VMs against physical resources available. Tracking it over time shows when a cluster needs another host before CPU ready time starts hurting users.

For example, 240 allocated vCPUs on a cluster with 48 usable cores gives a 5:1 ratio. Whether 5:1 is safe depends on workload behavior, which is why you pair the ratio with measured CPU ready time rather than a fixed rule. Keep headroom for host failure so the cluster can lose one node and still carry the load.

Frequently Asked Questions

How much does VM performance monitoring software cost?
Cost depends on the tool. Zabbix is free open-source software, several others offer freemium tiers, and most commercial platforms price by device, sensor or monitored resource and require a quote. Always request current pricing from the vendor and model your VM and host count first.

Can one tool monitor both VMware and Hyper-V?
Yes. Most platforms in this list document support for both VMware and Hyper-V, though depth varies. Confirm the exact versions and metrics, such as CPU ready time or datastore latency, in each vendor's documentation and test them during a trial.

How long does it take to deploy VM monitoring?
A basic deployment that discovers hosts and VMs can take hours to a few days, depending on credentials, firewall rules and collector setup. Tuning alert thresholds and building dashboards for your workloads usually takes a few additional weeks of observation.