Datadog

Datadog is the leading observability platform — metrics, logs, traces, and APM in a unified interface. But its per-host pricing ($15-$34/host/month) with additional charges for logs, APM, and custom metrics creates bills that can reach thousands per month for mid-size deployments.

Grafana provides the visualization and dashboarding layer — when paired with Prometheus for metrics, Loki for logs, and Tempo for traces, you get a complete observability stack that's entirely open source. Uptime-Kuma focuses specifically on uptime monitoring with a clean status page and alert notifications. For the full observability picture, the Grafana + Prometheus + Loki stack is the most common self-hosted alternative.

The cost difference is dramatic. A typical mid-size deployment (20 servers, moderate log volume) can cost $3,000-5,000/month on Datadog. The same monitoring via Grafana Cloud's free tier or self-hosted Grafana + Prometheus costs $50-200/month for infrastructure. At enterprise scale, the savings justify dedicated DevOps time for managing the monitoring stack.

The trade-off is operational complexity. Datadog requires zero infrastructure management — you install an agent and everything works. Running Prometheus, Loki, Grafana, and Tempo requires understanding each component, configuring retention policies, managing storage, and handling upgrades. For teams with strong DevOps skills, this is routine. For teams without, Datadog's managed service has real value.