prometheus

oxynote

+123

An open‑source technical wiki connected to the systems it describes

prometheus

+139

The Prometheus monitoring system and time series database.

openobserve

+132

Open source observability platform for logs, metrics, traces, RUM (web, android, ios), Session replay, pipelines, SLO and LLM observability. A sophisticated, simple and highly performant alternative to Datadog, Splunk, and Elasticsearch with 140x lower storage costs and single binary deployment.

grafana

+129

The open and composable observability and data visualization platform. Visualize metrics, logs, and traces from multiple sources like Prometheus, Loki, Elasticsearch, InfluxDB, Postgres and many more.

netdata

+122

The fastest path to AI-powered full stack observability, even for lean teams.

holmesgpt

+58

SRE Agent - CNCF Sandbox Project

VictoriaMetrics

+55

VictoriaMetrics: fast, cost-effective monitoring solution and time series database

SigNoz/signoz

+47

SigNoz is an open-source, OpenTelemetry-native observability platform for your team and their AI agents. Get logs, metrics, and traces in one tool with features like APM, distributed tracing, log management, infra monitoring, etc. Combined with SigNoz MCP and a native AI teammate (in SigNoz Cloud) it helps you build more resilient apps.

grafana/loki

+45

Like Prometheus, but for logs.