Yes, both Nagios XI and OP5 Monitor offer a Free Trial.
Nagios XI is designed for Large Enterprises, Medium Business and Small Business.
OP5 Monitor is designed for Large Enterprises, Medium Business and Small Business.
Pricing details for both Nagios XI and OP5 Monitor are unavailable at this time. Contact the respective providers for more information.
Some top alternatives to Nagios XI includes Zabbix, Ne.Mo. Network Monitoring, PRTG Network Monitor, Spiceworks Network Monitor, Nagios Network Analyzer, SolarWinds ipMonitor, Netcrunch, OP5 Monitor, SolarWinds Network Performance Monitor, Checkmk and NinjaOne (NinjaRMM).
Some top alternatives to OP5 Monitor includes Nagios XI, PRTG Network Monitor, Spiceworks Network Monitor, Nagios Network Analyzer, OpenNMS, SolarWinds ipMonitor, Panopta, Netcrunch, vRealize Network Insight, Monitis and NinjaOne (NinjaRMM).