DomainTools Monitors vs OpenNMS
| DomainTools Monitors | OpenNMS | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | $500/mo |
| Open source | No | No |
| Platforms | api, Web | api, Linux, self-hosted, Web |
| Free plan | No | Yes |
| Alert channels | email, sms |
Both are listed in Best DNS Monitoring Software. On Freedom251, OpenNMS scores higher on our published basis.