Side by side
Domain Monitor vs OpenNMS
Both stand on dns monitoring software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan AndroidAPIWeb
Domain Monitor covers domains, uptime and related infrastructure, with a free tier and a larger Pro allowance. Check the free plan limits and the first-month pricing change before choosing Pro.
Visit Domain Monitor Free plan APILinuxSelf-hosted+1
OpenNMS covers network monitoring across local and remote environments, with Horizon and Meridian serving different release and subscription needs. Consider Horizon’s production-readiness caveat and Meridian’s per-instance subscription limits when selecting a distribution.
Visit OpenNMSThe facts
| Domain Monitor | OpenNMS | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | No | Not published |
| Runs on | Android, API, Web | API, Linux, Self-hosted, Web |
| Lowest paid plan | Pro: £6.39 a month | Basic: $6,000 a year |
| Plans published | 5 | 6 |
| Maker | Not published | Not published |
| Website | domain-monitor.io | opennms.com |
| On dns monitoring software | #6 of 39 | #14 of 39 |
Domain Monitor: what it does well
- Free plan includes two monitors
- Tracks WHOIS records and domain expiration
- Alerts available through multiple channels
- Contacts can receive alerts without accounts
- Includes free traceroute and ping-test tools
What to know first
- Free plan covers one domain
- Free checks run every five minutes
- Domain crawls can take up to 48 hours
OpenNMS: what it does well
- Horizon community distribution is free
- Monitors remote devices through Minions
- Supports multiple traffic-flow formats
- Grafana plugin displays alarms, outages, and KPIs
What to know first
- Horizon features may not be production-ready
- 24/7 emergency support costs extra
- Support plans exclude several third-party products
- Meridian subscriptions are limited per instance
Alternatives to Domain Monitor Alternatives to OpenNMS The whole list