Prometheus vs Datadog: Feature Comparison, Pros/Cons, and Verdict | DevOps Daily

A structured comparison of Prometheus and Datadog across 12 dimensions including metrics collection model, query language, dashboarding, alerting, scalability, long-term storage, Kubernetes integration, log/trace support, cost, and vendor independence. Prometheus is open-source, free, and PromQL-powered but requires self-managed infrastructure and additional tools (Grafana, Thanos, Alertmanager). Datadog is a fully managed SaaS with 800+ integrations, built-in APM and logs, but carries per-host and per-metric pricing that can escalate at scale. The verdict: Prometheus wins on cost and control for teams with platform engineering capacity; Datadog wins on speed and unified observability for teams that prefer managed services.