Best Self-Hosted Monitoring Tools
Self-hosted monitoring splits into two jobs, and the tool you want depends on which one you mean. If the question is 'is my service up, and can something ping me the second it is not,' that is uptime monitoring, and Uptime Kuma owns that space in the homelab. If the question is 'what are the CPU, RAM, disk, and network doing on every box, with history and graphs,' that is metrics, and Netdata, Zabbix, or Prometheus with Grafana handle it. Most people end up running one of each. Start with Uptime Kuma, then add a metrics tool when you actually need the graphs.
Updated 2026-08-03 · by Jonathan Caruso
Top pick
Uptime Kuma
Uptime Kuma is the first monitoring tool most homelabs install, and it earns the spot. You add a monitor by pasting a URL, an IP and port, a ping target, a DNS record, or a Docker container, and it checks on whatever interval you set. When something goes down it fires a notification to Discord, Telegram, email, Gotify, ntfy, or any of 90-plus services, and it publishes a public or private status page so you see everything at a glance. It runs from a single Docker container in about 128 MB of RAM with SQLite built in, so there is no separate database to stand up. It answers the one question that matters most (is it up?) without asking you to build dashboards first.
The options
Uptime Kuma
MIT, freeUptime and status monitoring: checks HTTP, TCP, ping, DNS, and Docker, then alerts and shows a status page.
Visit Uptime Kuma site- Runs on
- Docker, ~128 MB RAM, SQLite built in.
- Pick it if
- You want fast up/down checks with alerts and a status page, and almost no setup.
Netdata
GPL-3.0, free agent (optional paid cloud)Per-second, per-node metrics that auto-detect almost everything with no dashboard building.
Visit Netdata site- Runs on
- Agent per host, ~150-300 MB RAM.
- Pick it if
- You want granular real-time metrics on each machine the moment you install it.
Zabbix
GPL-2.0, free (paid support only)One server watching many hosts and network devices over agents, SNMP, and IPMI, with deep alerting.
Visit Zabbix site- Runs on
- Server plus a MySQL or PostgreSQL database, ~2 GB RAM.
- Pick it if
- You run enough hosts and gear that you want a single console and real escalation rules.
Prometheus + Grafana
Apache-2.0 and AGPL-3.0, freeThe standard metrics stack: Prometheus scrapes exporters, Grafana draws the dashboards.
Visit Prometheus + Grafana site- Runs on
- Docker, ~1-2 GB RAM combined, grows with retention.
- Pick it if
- You want the industry-standard toolset, an exporter for everything, and full control of dashboards and alerts.
LibreNMS
GPL-3.0, freeNetwork monitoring with SNMP autodiscovery for switches, routers, firewalls, and access points.
Visit LibreNMS site- Runs on
- LAMP-style install, ~2 GB RAM.
- Pick it if
- The gear you care about is network hardware, and you want it found and graphed automatically.
Checkmk Raw
GPL-2.0 (Raw edition free)Nagios-derived host and service monitoring with a modern UI and a large plugin catalog.
Visit Checkmk Raw site- Runs on
- Single-server install, ~1-2 GB RAM.
- Pick it if
- You want classic host and service checks with thresholds without hand-editing Nagios config.
Beszel
MIT, freeA light hub-and-agent dashboard for CPU, memory, disk, network, and Docker stats across servers.
Visit Beszel site- Runs on
- Hub ~80 MB RAM, agents tiny.
- Pick it if
- You want a clean multi-server view and alerts without running the whole Prometheus stack.
How to choose
First decide whether you need uptime or metrics, because they are different tools. Uptime monitoring answers is-it-reachable and pages you when it is not; Uptime Kuma covers that for almost everyone, and Beszel adds a light metrics layer if you want basic graphs too. Metrics monitoring answers what-is-it-doing and keeps history you can scroll back through. For a single box, Netdata gives you that instantly with nothing to configure. For many boxes with dashboards you design yourself, the Prometheus and Grafana stack is the standard, and it is worth reading Prometheus vs Zabbix before you commit, because those two represent the two philosophies (pull-based metrics you graph yourself versus an all-in-one server that ships its own UI).
Then match the tool to what you are watching. If most of what you monitor is network gear (managed switches, a firewall, access points), LibreNMS and Zabbix speak SNMP and will discover and graph devices that Netdata never sees; keep a subnet calculator handy when you lay out what to poll. If it is servers and services, Netdata, Checkmk, or Prometheus fit better. Run whichever you pick in a container next to the rest of your stack (Docker or Podman both work), give it its own small volume for the database, and point a self-hosted dashboard at it so the status page and graphs sit one click from everything else.
The verdict
Install Uptime Kuma today. It takes ten minutes, it answers the question you will ask most (is it up?), and the alerts alone are worth it. Add Netdata on each machine when you want to see what the hardware is actually doing, since it needs no dashboard work to be useful. Move up to Zabbix or the Prometheus and Grafana stack once you are watching enough hosts that you want one console, history, and real escalation; Prometheus vs Zabbix is the decision to read first. Reach for LibreNMS instead if your world is network hardware and SNMP. Beszel is the pick when you want a light, good-looking multi-server view without standing up the full stack. Whatever you run, keep it in a container, back up its database, and do not expose it to the internet without a VPN or a reverse proxy in front.
FAQ
What is the best self-hosted monitoring tool?
For most homelabs, Uptime Kuma, because up/down alerting is the thing you need first and it sets up in minutes. Add Netdata when you want live per-machine metrics. Step up to Zabbix or Prometheus with Grafana once you are watching enough hosts to want a single console with history and escalation.
What is the best self-hosted network monitoring tool?
LibreNMS if your focus is SNMP devices like switches, routers, firewalls, and access points; it autodiscovers them and graphs interfaces without much setup. Zabbix is the heavier option that also does SNMP and adds deeper alerting and templating, which pays off once you are monitoring both network gear and servers from one place.
Is Zabbix really free?
Yes. The Zabbix software is fully open source under the GPL-2.0 with no paid edition and no feature locked behind a license. There is no free-versus-pro split the way some tools have. Zabbix the company sells support, training, and turnkey appliances, but you can run the full server, including alerting and every template, for nothing.
What are the best server monitoring tools?
For metrics, Netdata for instant per-node graphs, Prometheus with Grafana for the standard customizable stack, and Zabbix or Checkmk for agent-based host and service monitoring at scale. For uptime and alerting, Uptime Kuma. Many homelabs run Uptime Kuma for up/down plus one metrics tool, rather than making a single tool do both jobs.
What is the best monitoring tool?
There is no single winner, because uptime monitoring and metrics monitoring are different problems. For a home setup, the practical answer is Uptime Kuma for is-it-up alerting and Netdata for real-time metrics, then Zabbix or Prometheus with Grafana if you outgrow them. A paid tool like Datadog does all of it in one place, which is exactly what you are self-hosting to avoid paying for.
Is Uptime Kuma enough on its own?
For a lot of homelabs, yes. If all you want is to know when a service, a website, or a host goes down and to get a Discord or Telegram alert about it, Uptime Kuma covers that completely and gives you a status page for free. It does not collect CPU, memory, or disk metrics over time, so add Netdata or Beszel when you want to see trends and work out why something is slow rather than just down.
What is a free self-hosted alternative to Datadog or UptimeRobot?
Uptime Kuma replaces UptimeRobot directly: the same up/down checks and status pages, running on your own hardware with no monitor limit. For the broader Datadog-style metrics and dashboards, Prometheus with Grafana or Zabbix gets you most of the way, and Netdata covers per-host real-time stats. None of them cost anything beyond the box they run on.