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
Site24x7 is a cloud-based monitoring and observability platform that tracks uptime, performance, and availability of websites, servers, networks, applications, containers, and cloud infrastructure. It provides APM, real user and synthetic monitoring, log management, alerts and anomaly detection.
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
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
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
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
Self-hosted status page and uptime monitoring tool with configurable health checks, dashboards, metrics, and alerting for HTTP, TCP, ICMP, and DNS endpoints.

11.9k stars808 forksApache-2.0last commit Actively maintained
Self-hosted monitoring for websites and servers with uptime checks, response-time metrics, incidents, and status pages, plus optional agent-based hardware monitoring.

10.8k stars1.2k forksAGPL-3.0last commit Actively maintained
Self-hosted S.M.A.R.T monitoring dashboard that collects SMART data, visualizes historical trends, and alerts on drive health.
8.1k stars296 forksMITlast commit Actively maintained
Self-hosted lightweight LAN IP/ARP scanner with web dashboard, new-host notifications, online/offline history, and metrics export to Prometheus or InfluxDB for Grafana.

7.5k stars283 forksMITlast commit Slowing down
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
Self-hosted insight hub combining privacy-focused web analytics, uptime monitoring, and server/server-docker status with an API for integrations.

3.1k stars196 forksApache-2.0last commit Actively maintained
Self-hosted speed test analysis tool that automates tests, stores results up to 30 days, and provides dashboards, health checks, and multi-server support.

3k stars154 forksMITlast commit Actively maintained
Self-hosted monitoring for servers, services, SSL, incidents and status pages; React frontend with a Go backend and embedded SQLite data store.

2.9k stars253 forksMITlast commit Actively maintained
Self-hosted tool that auto-discovers system and container ports, maps services in real time, and helps prevent port conflicts across servers via a web dashboard.
2.4k stars99 forksMITlast commit Actively maintained
Open source status page and monitoring server for HTTP, TCP, UDP, ICMP and gRPC checks, with dashboards, alerts, and a REST API.

2k stars183 forksGPL-3.0last commit Slowing down
SmokePing is an active network monitoring tool that measures latency and packet loss over time, stores results in RRD, and visualizes them via a web UI with alerting.

2k stars216 forksGPL-2.0last 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
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. 18 of 20 shipped a commit in the last six months. Licences in this list: GPL-3.0, Apache-2.0, MIT, AGPL-3.0, GPL-2.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Monitoring & Observability.