POST metrics from any service, visualize them in real time, set alert thresholds. The one Datadog dashboard you actually use, owned by you at zero per-metric cost.
Unlimited metrics, 90-day retention, alerting, public dashboards. Self-hosted on your hardware, no usage caps, no phone-home, your data stays on disk forever.
One ~13MB binary. No Docker, no dependencies, no background daemons.