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
Datadog APM provides distributed tracing and application performance monitoring, collecting traces, service metrics, latency and error data, visualizing request flows, and enabling root-cause analysis across microservices and underlying infrastructure.
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
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
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
Parseable ingests, analyzes, and extracts insights from MELT telemetry data with predictive analytics and a unified SQL/NL querying interface.

2.4k stars171 forksAGPL-3.0last commit Actively maintained
Privacy-first, cookie-less open-source web analytics with session analysis, real-user performance monitoring, error tracking and feature flags. Self-hostable or available as managed cloud.

1.2k stars71 forksAGPL-3.0last commit Actively maintained
Real-time dashboard to analyze Traefik logs with GeoIP, status code breakdowns, filters, and multi-agent metrics via a Go agent and web UI.

792 stars21 forksAGPL-3.0last 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
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. 10 of 11 shipped a commit in the last six months. Licences in this list: AGPL-3.0, Apache-2.0, GPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Monitoring & Observability.