Open-source, agent-based monitoring platform delivering per-second metrics, edge ML anomaly detection, tiered time-series storage and centralized cloud UI.

80.3k stars6.6k forksGPL-3.0last commit Actively maintained
Cloud-based observability platform that monitors applications, infrastructure, logs, traces, and user experience. Provides AI-assisted anomaly detection, root-cause analysis, automation, and integrated application and threat security.
Open-source, agent-based monitoring platform delivering per-second metrics, edge ML anomaly detection, tiered time-series storage and centralized cloud UI.

80.3k stars6.6k forksGPL-3.0last commit Actively maintained
Grafana is an open source observability and data visualization platform for querying, graphing, and alerting on metrics, logs, and traces across many data sources.

76.4k stars14.6k forksAGPL-3.0last commit Actively maintained
Prometheus is an open-source monitoring and time-series database for collecting metrics, querying with PromQL, and alerting on system and application health.

65.8k stars10.8k forksApache-2.0last commit Actively maintained
Sentry is a developer-focused platform for error tracking, performance monitoring, and tracing to help teams detect, investigate, and fix issues faster.

44.6k stars4.8k forkslast commit Actively maintained
Langfuse is an open-source LLM engineering platform for tracing, metrics, evaluations, datasets, and prompt management to debug and improve AI applications.

33.8k stars3.6k forkslast commit Actively maintained
Glances is a cross-platform system monitoring tool providing a terminal dashboard, web UI, and REST/XML-RPC APIs for local or remote monitoring and exporting metrics.

33.4k stars1.8k forkslast commit Actively maintained
SigNoz is an open-source platform that collects and correlates logs, metrics, and traces using OpenTelemetry for unified observability.

31.9k stars2.4k forkslast commit Actively maintained
Beszel is a lightweight server monitoring platform with historical metrics, Docker/Podman container stats, configurable alerts, multi-user access, and an API.

24.7k stars974 forksMITlast commit Actively maintained
cAdvisor (Container Advisor) collects, processes, and exports resource usage and performance metrics for running containers, with a built-in web UI and REST API.
19.4k stars2.5k forkslast commit Actively maintained
Fast, resource-efficient time series database compatible with Prometheus and Grafana, for scalable monitoring and long-term metrics storage.

17.6k stars1.7k forksApache-2.0last commit Actively maintained
Self-hostable observability platform for uptime monitoring, alerting, incident management, on-call, status pages, logs, and APM in one integrated suite.

7.5k stars445 forksApache-2.0last commit Actively maintained
Real-time monitoring dashboard for Proxmox, Docker/Podman, and Kubernetes with smart alerts, agent auto-discovery, metrics history, and optional AI insights.

6.6k stars265 forksMITlast commit Actively maintained
Zabbix is an open-source monitoring and observability platform for networks, servers, VMs, applications, and cloud infrastructure, with alerting and dashboards.

6.3k stars1.3k forksAGPL-3.0last commit Actively maintained
Dashdot is a modern server dashboard built with React and Node.js for real-time server monitoring on self-hosted systems.

3.5k stars134 forksMITlast commit Actively maintained
LoggiFly monitors Docker/Podman container logs for keywords or regex patterns and sends alerts via ntfy or Apprise, with optional log attachments and container actions.

1.8k stars51 forksMITlast commit Actively maintained
Tiny self-hosted dashboard to monitor and control UPS devices via Network UPS Tools (NUT), with real-time stats, multi-UPS support, and Prometheus/InfluxDB integrations.
1.6k stars45 forksApache-2.0last commit Actively maintained
Lightweight Prometheus exporter that exposes metrics from the *arr suite (Sonarr, Radarr, Lidarr, etc.) for monitoring and Grafana dashboards.
417 stars18 forksGPL-3.0last commit Actively maintained
Self-hosted Docker monitoring: real-time logs, per-container terminals, rules-based alerts and safe auto-remediation for developer teams.

299 stars16 forksApache-2.0last commit Actively maintained
Meshping measures per-target ICMP latencies, builds histograms and heatmaps, runs traceroutes with Path MTU discovery, draws SVG network maps, and exposes Prometheus metrics.
168 stars10 forksMITlast commit Actively maintained
Open-source error tracking, performance monitoring and uptime checks compatible with Sentry SDKs; available self-hosted or as a hosted SaaS.

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Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 19 of 20 shipped a commit in the last six months. Licences in this list: GPL-3.0, AGPL-3.0, Apache-2.0, MIT. In exchange you take on hosting, backups and updates yourself.
Browse everything in Monitoring & Observability.