Nagios XI vs Netdata

Nagios XI monitors servers, network devices, applications and services from a Linux server you manage. It checks configured thresholds, records results and sends notifications. Standard includes more than 90 configuration wizards, auto-discovery, dashboards, performance graphs, an open REST API, automation, configuration rollback and snapshots. Enterprise adds SLA and capacity-planning reports, scheduled reports and pages, business process intelligence, bulk changes and an audit log. Users can be restricted to assigned host and service groups, with authentication options including Active Directory or LDAP over SSL, Microsoft Entra ID single sign-on and Duo two-factor authentication. It is self-hosted on Linux, with virtual machine images for several hypervisors and offline installation on Red Hat and CentOS Stream. A 30-day trial provides unlimited monitoring, Enterprise features and direct support without a credit card. The free plan is limited to 7 nodes or 100 services, whichever comes first. Paid perpetual licenses are priced by monitored nodes: Standard is $2,595.00 once and Enterprise is $4,690.00 once, each shown for 100 nodes.

Netdata is an observability platform for real-time infrastructure monitoring and troubleshooting. Its agent gathers metrics and logs and provides per-second monitoring, machine-learning anomaly detection, dashboards, and alerts. Netdata lists more than 800 collectors and notification channels, including Slack, PagerDuty, Microsoft Teams, email, and webhooks. The agent can ingest Prometheus, OpenMetrics, StatsD, and OpenTelemetry data and export to Prometheus Remote Write, InfluxDB, Graphite, OpenTSDB, and TimescaleDB. Organizations can use the managed cloud platform or deploy on premises, including in air-gapped environments. Netdata says metrics remain on the user's infrastructure while only metadata reaches the cloud. Native Android and iOS apps provide alerts and notifications. The Community plan is free, with up to five active connected nodes and one active custom dashboard per room. Signing up for Netdata Cloud includes a 14-day Business trial for any number of nodes with no limits. Business costs $4.50 per month billed annually, with a stated total of $540.00/year.