- uptime-kuma by louislam, 94k stars. Self-hosted uptime monitor with status pages and alerts
- prometheus by prometheus, 68k stars. Monitoring system and time series database
- sentry by getsentry, 46k stars. Error tracking and performance monitoring for applications
- signoz by SigNoz, 33k stars. OpenTelemetry observability platform for logs, metrics and traces
- loki by grafana, 29k stars. Log aggregation system that indexes labels rather than full text
- beszel by henrygd, 27k stars. Lightweight server monitor with history, Docker stats, and alerts
- winston by winstonjs, 25k stars. General purpose logging library for JavaScript with pluggable transports
- witr by pranshuparmar, 23k stars. CLI and TUI that traces a process, port or file to what started it
- pino by pinojs, 18k stars. Fast JSON logger for Node.js
- VictoriaMetrics by VictoriaMetrics, 18k stars. Fast time series database and monitoring system
- opensre by Tracer-Cloud, 13k stars. Agent that investigates alerts and finds root causes across your stack
- Checkmate by bluewave-labs, 11k stars. Self-hosted uptime and server hardware monitor with incident tracking and charts
- coroot by coroot, 8.0k stars. Observability tool with metrics, logs, traces and AI root cause analysis
- fleet by fleetdm, 7.2k stars. Device management and vulnerability reporting built on osquery
- latitude-llm by latitude-dev, 4.8k stars. Open-source observability for AI agents with trace-based failure analysis
- tianji by msgbyte, 3.1k stars. Self-hosted website analytics, uptime monitoring and server status in one app
- VictoriaLogs by VictoriaMetrics, 2.5k stars. Fast log database that scales to terabytes of logs
- future-agi by future-agi, 2.3k stars. Self-hostable platform for tracing, evaluating and guarding LLM and agent apps
- logtape by dahlia, 2.0k stars. Zero-dependency logging library for Deno, Node.js, Bun and browsers
- kubetail by kubetail-org, 1.8k stars. Real-time Kubernetes log viewer in a terminal or a browser
- traceway by tracewayapp, 1.8k stars. Observability platform for logs, metrics and traces via OpenTelemetry
- aura by mezmo, 412 stars. SRE agent platform with guardrails, streaming and failure handling
- homebutler by Higangssh, 361 stars. Single Go binary that reports server changes worth noting, with a built in MCP server
- rejourney by rejourneyco, 283 stars. Product analytics, session replay and crash reporting SDK for web and mobile
- siclaw by scitix, 239 stars. AI assistant for read-only Kubernetes and infrastructure diagnostics
- procinsh by akawashiro, 141 stars. Real-time 3D view of Linux processes using eBPF and Three.js
- nanotdb by aymanhs, 141 stars. Single Go binary: time-series store and dashboard for edge devices and metrics
- restoredrill by ahmadpiran, 115 stars. Checks that PostgreSQL and MySQL backups actually restore
- burn by tanrikuluozlem, 104 stars. CLI that shows which Kubernetes workloads cost the most money
- vpsmon by leodeim, 92 stars. Small Go monitor for system stats on a Linux VPS
- gpu-telemetry by last9, 78 stars. Per-node OTLP agent that maps GPU metrics to Kubernetes pods or Slurm jobs
- opslane by opslane, 50 stars. Watches real user sessions to find frontend bugs and draft fixes for review
- project-arena by edgedelta, 13 stars. Kubernetes incident benchmark for scoring AI incident investigation tools
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