node_exporter

Prometheus

prometheus/prometheus

Popular

CNCF monitoring system and time-series database with pull-based scraping and PromQL.

Grafana

grafana/grafana

Popular

Dashboards and visualization for metrics, logs and traces from virtually any data source.

Datadog

datadoghq.com

Popular

Leading SaaS observability platform unifying infrastructure metrics, APM, logs, RUM and security.

VictoriaMetrics

VictoriaMetrics/VictoriaMetrics

Rising

Fast, resource-efficient Prometheus-compatible time-series database and monitoring stack.

Grafana Mimir

grafana/mimir

Horizontally scalable, multi-tenant long-term storage for Prometheus metrics on object storage.

Thanos

thanos-io/thanos

Adds global querying, high availability and object-storage retention on top of existing Prometheus servers.

New Relic

newrelic.com

SaaS observability platform with APM, infrastructure and logs, usage-based pricing and a free tier.

Dynatrace

dynatrace.com

Enterprise observability with automatic discovery via OneAgent and AI-driven root-cause analysis.

Zabbix

zabbix/zabbix

Mature open-source monitoring for servers, networks and devices using agents, SNMP and templates.