What should you compare in open-source monitoring?

What is checked. Alert routing. Retention

Does a sponsor change the order of this category?

No. Sponsor slots are labelled and sit outside the organic list.

Monitoring tools in the catalog

Uptime and metrics you can host. Decide whether you need uptime checks, metrics, or both.

Compare the set

What to compare

What is checked
Alert routing
Retention

Uptime Kuma

A fancy self-hosted monitoring tool.

Stars: 91,999
Updated: 3d ago
License: MIT
Hosting: Self-hosted
Category: Monitoring

Often instead of Datadog

Website

Netdata

Real-time infrastructure monitoring with system metrics, dashboards, and alerts.

Stars: 80,788
Updated: today
License: GPL-3.0
Hosting: Self-hosted
Category: Monitoring

Website

Grafana

An observability dashboard for exploring metrics, logs, and traces from data sources.

Stars: 77,059
Updated: today
License: AGPL-3.0
Hosting: Self-hosted
Category: Monitoring

Website

Prometheus

The Prometheus monitoring system and time series database.

Stars: 66,336
Updated: 4d ago
License: Apache-2.0
Hosting: Self-hosted
Category: Monitoring

Often instead of Datadog

Website

Beszel

A lightweight server monitor for resource metrics, historical graphs, and alerts.

Stars: 25,944
Updated: 2d ago
License: MIT
Hosting: Self-hosted
Category: Monitoring

Website

OpenObserve

OpenObserve collects and explores logs, metrics, traces, and real user monitoring data.

Stars: 22,239
Updated: 1d ago
License: AGPL-3.0
Hosting: Self-hosted
Category: Monitoring

Website

Gatus

Gatus checks service health and publishes status pages with alerting.

Stars: 12,230
Updated: 4d ago
License: Apache-2.0
Hosting: Self-hosted
Category: Monitoring

Website

Pyroscope

Pyroscope records continuous application profiles to investigate performance bottlenecks.

Stars: 11,690
Updated: 2d ago
License: AGPL-3.0
Hosting: Self-hosted
Category: Monitoring

Website

OpenStatus

OpenStatus monitors endpoints and publishes service status pages.

Stars: 9,164
Updated: 1d ago
License: AGPL-3.0
Hosting: Self-hosted
Category: Monitoring

Website

nvitop

An interactive NVIDIA-GPU process viewer and beyond, the one-stop solution for GPU process management.

Stars: 7,185
Updated: 5d ago
License: Apache-2.0
Hosting: Self-hosted
Category: Monitoring

Website

Pulse

Real-time monitoring dashboard for Proxmox VE, PBS, Docker, Kubernetes, TrueNAS and vSphere. Self-hosted, with smart alerts and AI patrols that catch silent failures.

Stars: 6,779
Updated: today
License: MIT
Hosting: Self-hosted
Category: Monitoring

Website

Zabbix

Infrastructure monitoring software for hosts, metrics, alerts, and dashboards.

Stars: 6,435
Updated: today
License: AGPL-3.0
Hosting: Self-hosted
Category: Monitoring

Website

Commercial products people replace

Datadog alternatives

Related collections

Self-hosted essentials

Questions about monitoring

What should you compare?: What is checked. Alert routing. Retention.
Does a sponsor change the order?: No. Sponsor slots are labelled and sit outside the organic list.

Repository activity is a signal, not a security or quality guarantee. Snapshot: October 1, 2026.