Lightweight server monitoring for a handful of VPSes

PulseNode, Beszel, Netdata, Prometheus + Grafana, Uptime Kuma and Zabbix, compared for the case where you have a few servers and no platform team.

PulseNode · updated July 2026

You have three or four VPSes, maybe a few more. They run side projects, a client app, a database, some Docker containers. You want to know the boxes are up and that a disk isn't quietly filling. If CPU pegs at 3 a.m., you want a message about it.

What you don't want is to build a metrics stack to get there. Exporters, scrape configs, a time-series database to run and back up, dashboards to assemble from scratch: reasonable work for a platform team, a lot of overhead for one person.

This page maps the lightweight server monitoring options for that situation. PulseNode is our product, so it goes first. The other tools here are all good at their jobs, and we say so when one of them is the better pick. One-on-one comparisons are linked where we have them.

What "lightweight" means for a few servers

The word gets stretched, so here is the yardstick we apply to every tool below. Setup should take minutes: one command per box, not an afternoon of assembly. Whatever runs on your server should be a small agent, and outbound-only is better still, since nothing new listens on a port.

Alerts have to leave the box. A chart you have to be watching is not an alert. The alert that matters most fires when an agent goes silent, since that's the server you most need to hear about. You should also be able to monitor multiple VPSes from one dashboard, with online, stale and offline at a glance and drill-down per box.

Last, price. Free software is free in money, not in maintenance: you run it, patch it, back it up. Paid hosting costs money and none of your evenings. Both are fair trades. Just know which one you're making.

The tools, compared

PulseNode: hosted, alerts included

PulseNode is a hosted VPS monitoring dashboard with a one-command agent. The agent is a single static Go binary for Linux amd64 and arm64; it pushes metrics out over HTTPS and never listens on a port. You get live CPU and load, RAM and swap, disk per mount, network per interface, uptime, Docker containers (status, image, uptime), and open TCP/UDP ports with the owning process. History charts cover 1h, 6h, 24h and 7d windows, with 14d and 30d on Pro. Threshold alerts on CPU, RAM and disk (with cooldowns and recovery notices) and an agent-offline notice go out over Telegram and email; external HTTP(S) checks with TLS-expiry show on the dashboard. There's nothing for you to host, upgrade or back up.

It's deliberately not a full observability platform. You don't get PromQL or custom dashboards, and there's no log or trace collection. Retention runs 7 days on Hobby and 30 on Pro, it's Linux-only, and the agent pushes about every 30 seconds. It's a paid product, €5/mo for 5 servers or €15/mo for 20, currently in founder beta.

Best for: indie founders and small teams who want host metrics, Docker and port visibility, and real alerts on a few servers, with no monitoring infrastructure of their own to run.

Beszel: free, self-hosted, small

Beszel answers the same problem if you'd rather host it yourself. It's open source (MIT), free, and built around a hub plus a tiny agent that installs with one command; community measurements put the agent at roughly 10 to 25 MB of RAM. It covers CPU, memory, network and disk history, Docker container stats, and configurable alerts on CPU, memory, disk, bandwidth, temperature, load average and status. It also has multi-user auth, an API, and automatic backups to disk or S3. For a homelab or a small fleet, it does most of what PulseNode does, free, as long as you're willing to run the hub.

Best for: self-hosters who want a clean, lightweight dashboard with alerts and don't mind operating the hub. If that's you, use it. (Read the full comparison →)

Netdata: maximum detail, per-second resolution

Netdata goes the other way. It auto-discovers thousands of metrics and charts them at per-second resolution, with anomaly detection and a polished real-time UI out of the box. The agent is open source (GPLv3+) and free for unlimited nodes, self-hosted; Netdata Cloud adds a multi-node view with a free Community tier (up to 5 nodes) and paid Business plans from about $4.50/node/month. It runs at roughly 5% of one core and about 150 MB RAM by default. When you need to zoom way in on one server's behavior, little else compares.

Best for: deep, high-resolution troubleshooting per host, free. It's denser than a few-servers overview needs, so the question is focus rather than price. (Read the full comparison →)

Prometheus + Grafana: the build-it-yourself stack

The industry standard, and powerful. Prometheus (Apache 2.0) handles collection and the PromQL query language, Grafana (AGPLv3) handles dashboards, Alertmanager routes the alerts, and there's an exporter for nearly everything. All of it is free and self-hosted; Grafana Cloud has a free tier and paid plans. The catch is equally well known: you assemble and operate the whole thing, from exporters and scrape configs to a time-series database with retention and storage to manage, dashboards to build, and Alertmanager to configure. For a platform team that wants flexibility, it's the right answer. For one person with four VPSes, it's a lot of machinery.

Best for: teams that want a flexible, query-driven observability stack and will put in the time to run and tune it. (Read the full comparison →)

Uptime Kuma: uptime and status pages (a different job)

Uptime Kuma is free, self-hosted and MIT-licensed, and it answers a different question. It watches reachability from the outside: HTTP(S), TCP, ping, DNS, keyword and SSL-certificate checks, with public status pages and 90+ notification integrations including Telegram, email, Slack and Discord. That tells you whether the site is up. It doesn't tell you what CPU, RAM and disk are doing on the host, which is why many people run it alongside a host-metrics tool.

Best for: up/down checks and status pages. Pair it with one of the tools above when you also want host health. (Read the full comparison →)

Zabbix: enterprise scale, for bigger fleets

Zabbix is a mature, enterprise-class open-source monitoring system (GPLv2+ historically, AGPLv3 from version 7.0), and every feature is free. It does agent and agentless collection, SNMP, discovery, templates, dashboards and alerting at serious scale. It's also built for environments far larger than a handful of VPSes, with setup and server footprint to match.

Best for: larger fleets and infrastructure teams who want one self-hosted system to monitor everything and have the time to operate it. (Read the full comparison →)

At a glance

Prices and licenses verified July 2026; check each vendor's site for the latest.

How to choose

It comes down to one question: do you want to run the monitoring yourself, or have it run for you?

If self-hosting sounds fine, pick Beszel for a clean lightweight dashboard, Netdata for exhaustive per-second detail, Prometheus + Grafana if you want a flexible stack and will invest in it, or Zabbix once the fleet gets big. All good tools; the cost is your time rather than money.

If you only need up/down checks and a status page, that's Uptime Kuma, possibly next to one of the above.

And if you want host metrics, Docker and port visibility, and alerts that reach you, without running any of it, that's PulseNode. One command per server, nothing to host or back up, alerts in Telegram and email. You're paying money to not spend time.