The 12 best Proxmox monitoring tools in 2026

What is Proxmox monitoring?

A VM can be running while the application inside it stopped answering. A node can have memory to spare while the shared storage underneath it is degraded. A Proxmox Backup Server can be reachable while a critical VM has not had a successful backup in a week. None of those show up if you only watch one layer.

Proxmox monitoring is the practice of watching all of them at once, so that you learn about a cluster incident before your users do, understand what it is doing to the guests, and get the right person notified. The tools below differ mostly in which layers they see natively and what you have to add to cover the rest. For monitoring beyond the hypervisor, see our guide to the best infrastructure monitoring tools.

The six layers a Proxmox setup needs watched

What Proxmox already gives you

Proxmox VE ships resource graphs and event notifications, notably for backups, fencing and replication. Proxmox Backup Server has its own notifications for verification, sync, prune and garbage collection. What an extra tool adds is metric rules with durations, consolidation across clusters, history, diagnosis context and, above all, a watcher that does not live inside the thing it watches. A comparison that says Proxmox cannot alert at all has not read the PVE notification docs or the PBS ones.

Key criteria to evaluate:

• • Real Proxmox coverage - Official API, exporter, community plugin, local agent, or plain Linux monitoring dressed up? Name the component that actually collects.
• • Cluster and inventory - Quorum, nodes, QEMU VMs, LXC containers, discovery, several clusters, identity kept across a migration, and an expected state per guest.
• • Storage depth, in three levels - PVE storage capacity, ZFS / Ceph / SMART / RAID health, and used space inside the guest OS. A single "storage: yes" hides too much.
• • Tasks, backups and jobs - Compare separately PVE task results, backup coverage and freshness, PBS jobs, and heartbeat monitoring of scheduled scripts. Distinguish a run that never happened, an explicit failure, and a run that overran.
• • Useful alerts - Bundled rules, thresholds with a duration, maintenance windows, deduplication, routing, escalation, acknowledgement, and what happens when data goes missing.
• • Monitoring resilience - What happens to collection when the queried node dies? Does the alert engine depend on the cluster it watches? How is a silent collector detected?
• • Deployment and operations - Permissions, network access, hosting, updates, metric storage, retention and the granularity it keeps. Comparative "install time" figures were deliberately not invented.
• • Cost for the same scope - Hosts, agents, discovered guests, services, sensors, series or ingestion: name the unit and the extras.
• • MSP needs - Customer separation, access rights and alert destinations. A multi-cluster view does not prove multi-tenant isolation; check that separately per platform.

This grid is how the tool sections below were assessed. Where a capability could not be confirmed in the documentation, it is marked "not established in the integration examined", never "impossible".

The alerts that make the criteria concrete

Check that the integration you pick can raise these, and how: on a signal, after a duration, with a maintenance window, to a named recipient, and with a clean return to normal.

• • Quorum lost, or a node that became unavailable.
• • A production VM stopped while its expected state is "running", excluding templates and guests that are meant to be off.
• • A storage that went inactive, or a free-space reserve that is too small given how fast it is growing.
• • A degraded ZFS pool, a disk failing SMART, or a Ceph incident that matters to the workloads.
• • Sustained CPU or memory saturation, or degraded disk performance, with a duration and context rather than one universal instant threshold.
• • A critical VM whose last backup is older than its protection objective, a failed job, or a verification in error.
• • A Proxmox task that failed or ran abnormally long, keeping the node, the guest and the final result for diagnosis.
• • A scheduled job with no success confirmation by its deadline: a database dump, an off-site sync, a periodic maintenance script.
• • An application that is unreachable even though its VM is running.
• • A collector or metric source that has gone silent past its expected window.

These ten scenarios are also the protocol we would use to turn this documentation review into a tested comparison.

Alternatives worth knowing

Five tools that did not need a full section, plus the native Proxmox tooling and the specialists you may pair with any platform above.

Native and management tooling

Proxmox Datacenter Manager is the official multi-cluster view and administration surface for PVE and PBS remotes, with a multi-cluster Ceph view since PDM 1.1. Its notification features are not a specialised monitoring engine, so keep the two roles apart. Introduction · Roadmap.

PegaProx is multi-cluster administration with metrics, alerts and PBS functions, for readers who also want to manage their infrastructure from the same place.

ProxMate and other mobile clients are useful to look and to administer; that scope does not prove continuous independent collection with an alert engine.

Specialists you may pair with any of the above

Healthchecks.io and Cronitor monitor scheduled jobs by pings and deadlines. Healthchecks adds optional start and failure signals; Cronitor documents start, success and failure plus duration rules. They are the reference points for the job-monitoring comparison below, and the choice they frame is one platform for infrastructure and jobs versus several specialised services. Neither is a native PBS integration.

Uptime Kuma, UptimeRobot and Pingdom cover availability from outside. Useful complements; not rivals for cluster resources.

New Relic, Dynatrace, Better Stack, OpenObserve, LogicMonitor and SolarWinds are not in the ranking by default because their Proxmox integration path was not demonstrated for this review. That is an editorial choice, not a claim that they cannot monitor these machines.

Site24x7 has a Proxmox integration announced as in development in the vendor response consulted. Re-check at publication; it is not presented as available here.

Monitoring Proxmox tasks, backups and scheduled jobs

Healthy machines are not enough; the operations you expect also have to complete. The table lists what to look for in a tool, scope by scope. It is a checklist, not a promise that every tool covers each line.

The native foundations are documented in the PVE task history, the PVE backup jobs and PBS maintenance. Prune and garbage collection are two distinct operations: a successful prune does not mean space was reclaimed.

For each tool, ask how the signal arrives: an API read, a plugin, a log, a native notification, or a ping you add to the script. Duration can only be measured precisely with start and end information. A missing final ping detects a missed deadline; on its own it does not say whether the job never started, failed, or is still running.

The asynchronous case. When a command or an API call launches a task in the background, acceptance is not success. The check has to wait for the final result before confirming, and a single global signal for a whole batch hides the one VM that failed inside it.

Scenarios to reproduce with your candidate tool: every critical VM has a backup under 24 hours old; the off-site copy is confirmed before the working day starts; a failed PBS verification pages the team; a daily dump with no success signal alerts once its grace period passes. The durations are examples to adapt, not universal thresholds.

Four distinctions to keep: a scheduled task is not an executed task; a launched task is not a successful task; a successful backup is not a finished remote copy; verified data is not a tested restore.

A worked pricing example

Take a small shop: 3 PVE nodes, 30 VMs, 10 LXC containers, 1 Proxmox Backup Server and 5 availability checks on the services the guests serve. Here is what it costs in Fivenines monitors, using the rule that guests discovered through the API are not monitors.

• • Agent on the 3 nodes, for local visibility and reporter redundancy: 3 monitors
• • Agent on the PBS server, for its resources and datastore capacity: 1 monitor
• • 5 uptime checks: 5 monitors
• • The 40 guests discovered through the API: 0 monitors

Total: 9 monitors, which fits the Starter plan (15 monitors) at €19/month, or €15/month billed annually, before applicable taxes. Pick the plan on the notification channels and features you need, not only on the count.

Scope of this example: guest metrics as seen by Proxmox, PBS resources and the availability of the endpoints you add. It does not include an agent inside each VM (only needed for in-guest processes, services and application checks), nor the task monitors that take the PVE and PBS job notifications (the variant below). Adding an agent in 10 guests brings the count to 19 monitors, which is the Pro plan.

Variant with jobs: adding 3 task monitors (one for the PBS verify job, one for the nightly database dump, one for the off-site copy) takes the base scenario to 12 monitors, still on Starter. The PBS one is wired once through the webhook target; the two scripts send their own success ping. How task monitors are counted.

For the other tools, keep exactly this scenario and price their own unit: sensors configured in PRTG, services discovered in Checkmk, host objects in Nagios XI, billable hosts and modules in Datadog, infrastructure, storage, series and operating time for Grafana. Until those quotes or comparable configurations exist, percentage savings would be invented, so none are given here.