Pulse vs Checkmk for Proxmox monitoring

The short version

Choose Checkmk when the estate is broad and heterogeneous: SNMP network gear, Windows fleets, hundreds of distinct service checks across many platforms. Its plugin catalogue and distributed monitoring are mature and very hard to beat on coverage.

Choose Pulse when Proxmox, Proxmox Backup Server, and containers are the centre of gravity and you want deep virtualization monitoring running in minutes: guests, storage, cluster state, backup and snapshot health out of the box, alerts tuned to how hypervisors actually misbehave, and for providers a per-client isolation model that is structural rather than configured.

Run both when you have both problems. They coexist cleanly: Checkmk keeps the network and OS layer, Pulse takes the virtualization layer. Neither install interferes with the other.

• Breadth of coverage. Around two thousand official check plugins. If a device speaks SNMP or runs an agent, Checkmk can probably monitor it. Pulse makes no attempt to match this.
• Network and hardware monitoring. Switches, firewalls, UPSes, printers, storage arrays. Pulse has no SNMP support at all.
• Windows estates. A first-class Windows agent with deep service, eventlog, and performance coverage. Pulse's agent reports Windows hosts, but Checkmk's Windows depth is far ahead.
• Distributed monitoring at scale. Multi-site setups with central aggregation have been a Checkmk speciality for many years.
• Maturity and ecosystem. Two decades of lineage, a large community, books, consultants, and a commercial support organisation behind it.

• Proxmox depth with zero assembly. Point Pulse at a cluster with a read-only API token and nodes, guests, storage, cluster quorum, snapshots, and PBS backup health are first-class screens immediately. In Checkmk the equivalent is a special agent to configure, service discovery to run, and rules to tune before the picture assembles.
• Backup awareness. PBS datastores, backup jobs, verification state, and per-guest backup coverage are native. Backup health is usually the thing a provider is contractually on the hook for, and bolting it onto a generic platform is real work.
• Alerting tuned to virtualization. Thresholds and hysteresis built around how guests and nodes actually flap: migrations, backup windows, reboots. The goal is an alert stream quiet enough to leave on.
• Time to running. One container or one install script. Minutes, not an afternoon of rules and discovery.
• A modern live UI. Real-time dashboards over websockets, a mobile app with push, and an optional AI layer that investigates findings on your own infrastructure.
• Per-client isolation for MSPs. Pulse MSP runs an isolated runtime per client workspace from one provider account: separate users, alerts, audit history, branded reports, and webhooks stamped with the client identity. In general-purpose platforms multi-tenancy is typically assembled from sites, folders, and permissions, and a configuration mistake there is a cross-client leak. See the multi-client architecture guide for why that distinction matters.

Both have a genuinely free starting point. Checkmk Raw is open source and free, with commercial editions priced on services monitored. Pulse Community is MIT-licensed, free, and self-hosted with no caps on monitored systems, with flat paid tiers for remote access, longer history, reporting, and RBAC. For providers, Pulse MSP starts at $149 per month for five client workspaces, about $30 per client. Which shape is cheaper depends entirely on your service count per client, so run both calculators against a real client before deciding on price.