Maintenant vs Nagios XI

Maintenant is a self-hosted, single-container dashboard for monitoring Docker and Kubernetes infrastructure. It tracks containers, HTTP and TCP endpoints, cron heartbeats, TLS certificates, and CPU, memory, network, and disk metrics. It can discover containers automatically, monitor health and restart loops, and stream logs. Update Intelligence checks OCI registries for image digest changes, while security insights identify exposed ports and risky configurations. The software uses SQLite by default, can be configured to use PostgreSQL, and does not require a separate datastore service. A REST API, real-time SSE streams, and an MCP server connect it to other systems and AI assistants. Community includes webhook and Discord alerts; paid editions add email and Telegram, and Pro adds Slack, Teams, and escalation policies. Community is free forever. Personal costs €149, paid once, including one year of updates; further updates cost 59 € incl. VAT per year. Pro costs €29 a month excluding VAT, or 290 € excluding VAT per year. There is no built-in authentication, so the dashboard and admin API need protection through a reverse proxy and authentication middleware.

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.