Network / NMS
Checkmk
Checkmk GmbH
A polished, fast Nagios successor — agent + SNMP, a huge plugin/"check" catalog, strong autodiscovery; used by 2,000+ commercial customers.
- Category
- Network / NMS
- License
- Open core
- Deployment
- SaaS or self-hosted
- Cost
- Low
- Free tier
- Yes
- Self-host effort
- Moderate
- Maturity
- Established
- Popularity
- 2,000+ commercial customers
The catch
Per-service pricing is transparent but counterintuitive (one host = many billable services), and the open Raw edition omits the HA, reporting and scaling features that make Enterprise worth it.
Monitors
NetworkServersMetricsLogsCloudK8s
Protocols
SNMPICMP / ping
Capabilities
AlertingDashboardsAutodiscoveryAPIConfig as code
Built for
Mid-marketEnterpriseMSP
The honest take
The “Nagios but actually pleasant” option, with genuinely good autodiscovery. Watch the per-service meter — a handful of dense hosts counts as a lot of services — and know the good stuff lives in Enterprise.
Pricing in the real world
- Community edition free
- Pro from ~€190/mo (~3,000 services)
Community (Raw) edition = €0; paid Pro from ~€190/mo for ~3,000 services.