Nagios XI
8.1#2 in dns monitoring software$2,595 one-timeFree planWebAPILinuxmacOS
VisitNagios XI vs Paessler PRTG Network Monitor
Paessler PRTG Network Monitor
7.7#5 in dns monitoring softwareFrom $200 a monthFree planAndroidiOSWebAPI
VisitWhat both publish
| Fact | Nagios XI | Paessler PRTG Network Monitor |
|---|---|---|
| API | The built-in REST API uses API-key authentication and returns JSON for reading, creating, updating and deleting system data. | PRTG provides an API for accessing monitoring data and developing custom features. |
| Founded | 2007 | 1997 |
| Headquarters | St. Paul, Minnesota, United States | Nuremberg, Germany |
| Integrations | Nagios XI supports authentication with Active Directory or LDAP over SSL, Single Sign-On with Microsoft Entra ID, and two-factor authentication through Duo. | PRTG can send notifications to Slack and Microsoft Teams through webhooks; Paessler also lists compatibility with tools including ServiceNow, Jira Service Management, PagerDuty, and OpsGenie. |
| Monitoring features | The Standard edition includes 90+ Configuration Wizards, Auto-Discovery, dashboards, performance graphs, an open REST API, automation, configuration rollback, and snapshots. | PRTG offers customizable alerts, scheduled reports, distributed monitoring, and dashboards with live status information. |
Nagios XI plans
- Standard — 100 Nodes$2,595, paid once
- Enterprise — 100 Nodes$4,690, paid once
- FreeFree
- Standard$2,595, paid once
- Standard (100-Node)$2,595, paid once
- Enterprise$4,690, paid once
Paessler PRTG Network Monitor plans
- Freeware EditionFree
- PRTG 500$200 a month
- PRTG 1000$358 a month
- PRTG 2500$742 a month
- PRTG 5000$1,300 a month
- PRTG 10000$1,642 a month
Pick Nagios XI if…
Nagios XI suits teams that want to monitor infrastructure from a Linux server they manage. It is also relevant to organizations that need self-hosted deployment, node-based licenses, or offline installation.
Pick Paessler PRTG Network Monitor if…
PRTG may suit teams monitoring small or medium IT infrastructures, as well as users with OT or IoT environments. It is an on-premises option for organizations using Windows servers.