We leverage DD’s API primarily for eventing. For example, deployment notifications are posted to datadog, where they overlay our metrics. This has proven very useful in tracking changes due to deploys and/or configuration changes.
While we do leverage the DataDog agent for standard and custom metrics, DataDog’s ability to put together dashboards (and alerting) for AWS without any modifications to the host is what really closed the deal for us.
It was basically a monitoring/metrics system to merge how I handle the monitoring of crons, work queue, system metrics, analytics, etc. into a single service. Right now, I'm stuck using 3.
Sure, I could just build something to merge it together ... but at that point, I'm halfway to building my own.
k.z