When comparing port-monitor.com vs Data Dog, the Slant community recommends Data Dog for most people. In the question“What are the best server performance monitoring tools?” Data Dog is ranked 11th while port-monitor.com is ranked 13th. The most important reason people chose Data Dog is:
5 VMs with 24h history and no alerts for free.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Checks every 60 seconds
Pro Multiple languages available
Pro Limited free tier
5 VMs with 24h history and no alerts for free.
Pro Docker support
The Datadog Agent container runs with the other containers on a host. It collects metrics from neighboring containers and from the host. It can monitor 10 or 20 containers free per host license.
Cons
Con Not installable locally
Con $15/host/month is quite expensive
If you are running big fat systems which are probably bare metal, DataDog may be a very good fit. But if you are running small virtual machines you may discover that its somewhat expensive price can become a real problem.