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Prometheus + Grafana — open source alternative

Open source metrics collection and dashboards.

Strengths

  • De-facto standard metrics stack.
  • Massive exporter ecosystem.
  • Grafana dashboards are industry standard.

Weaknesses

  • No built-in long-term storage by default.
  • Alert routing requires Alertmanager learning.
  • Not a turn-key APM — more assembly required.
License: Apache-2.0 / AGPL-3.0 (Grafana) Self-host difficulty: 3/5 Hosted cloud option

Official site · Source on GitHub

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