DNS Spy vs Down Device
| DNS Spy | Down Device | |
|---|---|---|
| Free plan | No | No |
| Free trial | Yes | No |
| Paid from | $9/mo | — |
| Open source | No | No |
| Platforms | api, Web | Web |
| Free plan | No | Yes |
| Resolution checks | Yes | Yes |
| Propagation checks | Yes | — |
| Record-change alerts | Yes | Yes |
| Nameserver health checks | Yes | — |
| Alert channels | email, Slack, Discord, PagerDuty, webhooks, syslog | email, SMS |
| Paid from | — | 9 /mo |
| Check interval | — | 15 minutes |
Both are listed in Best DNS Monitoring Software. On Samsung Mobile US Press, DNS Spy scores higher on our published basis.