DNSMonit vs Nagios XI

DNSMonit is a web and API service for monitoring DNS records, email-security settings, and domain expiration. It watches A, AAAA, MX, NS, TXT, CNAME, SOA, and CAA records, then alerts when values change. Alerts can arrive by email, Slack, Discord, or webhook and include the previous and current values. Free domains are checked hourly; paid plans are checked every 15 minutes. DNSMonit analyzes SPF, DKIM, and DMARC configuration and policy settings, and monitors WHOIS data for warnings 30, 14, 7, and 1 day before expiration. Two-factor authentication is included on every plan. Free costs nothing for up to three domains. Pro costs $9 a month for up to 25 domains. Agency costs $49 a month for up to 150 domains and includes a 14-day trial without a card. MSP costs $149 a month for up to 750 domains, with API access and priority support.

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.