Nagios XI vs Performance Co-Pilot

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.

Performance Co-Pilot (PCP) is a free, open-source, self-hosted toolkit and framework for system performance monitoring and management. It gathers metrics from systems, combines data from multiple hosts and operating systems, and supports both real-time and historical analysis. Users can compare hosts and time periods to find trends or unusual patterns. Agents collect information about CPU, disks, memory, networking, filesystems, databases, web servers, mail systems, and cluster infrastructure. Its client-server architecture allows several clients to monitor one host or one client to monitor many hosts. APIs, libraries, and a plugin framework let applications and other sources provide or use performance data. PCP offers integrations including a Grafana plugin, Ansible roles, Java instrumentation, and a PDF graph converter. Optional encrypted connections, authentication, and access restrictions are available. Linux distribution packages and a macOS installer are listed; Windows and Solaris require source builds.