Zabbix can monitor anything. For 5 VPSes, you want a simple Zabbix alternative.

Zabbix is free software and it can watch nearly anything with an IP address. It is also a server daemon, a database, a PHP frontend, and an agent per host, all deployed and kept alive by you. PulseNode is the small hosted version of the job. Where Zabbix is the right answer, this page says so.

PulseNode · updated July 2026

If you searched for a simple Zabbix alternative, you already know the shape of the problem. You don't need SNMP polling, IPMI, or a MySQL tuning project to watch five Linux boxes. You need to know when a disk fills up and when a server stops answering. Zabbix covers that plus roughly a hundred other things, and you operate the machinery for all of it whether you use it or not.

This page is for solo developers, small businesses, and agencies with one to twenty Linux VPSes. PulseNode is a young hosted product from a single founder; it is closed source and you cannot self-host it. Zabbix is free AGPLv3 software with two decades behind it. If those two sentences settle the question for you, install Zabbix and close this tab. We mean that.

The 30-second verdict

What it takes to stand up Zabbix, from Zabbix's own docs

Four moving parts before you see a graph

The architecture overview lists five components: the Zabbix server daemon, database storage, a web frontend, an agent on each monitored host, and an optional proxy for distributed setups. Skip the proxy and you still deploy and operate four things.

The database has to be a real RDBMS: MySQL 8.0.30+, MariaDB 10.5+, or PostgreSQL 13+ per the requirements page; SQLite is allowed only for proxies. The frontend needs PHP 8.0 to 8.5 behind Apache or Nginx, plus a list of PHP extensions.

The install sequence on Ubuntu

The official download wizard walks an Ubuntu install through:

1. Add the Zabbix apt repository (the zabbix-release deb).
2. Install the packages: zabbix-server-mysql, zabbix-frontend-php, zabbix-nginx-conf, zabbix-sql-scripts, zabbix-agent.
3. Create the MySQL or PostgreSQL database and user.
4. Import the initial schema from zabbix-sql-scripts.
5. Set DBPassword in /etc/zabbix/zabbix_server.conf.
6. Configure the web server piece.
7. Restart and enable zabbix-server, zabbix-agent, and the web stack.
8. Finish the frontend setup wizard in the browser.

None of those steps is hard on its own. Together they are a real deployment, and every piece of it is yours to patch and back up afterward.

The box it runs on

Zabbix's own docs suggest 2 vCPU and 8 GB of RAM as the sizing example for a small install of around 1,000 metrics. So the tool that watches your servers needs a server of its own, and that server needs patches and database backups. It also needs monitoring, which is a strange loop to end up in.

And then the real work starts

Installation gets you a login page, not an alert. In Zabbix's data model, hosts come before items, items before triggers, and triggers before actions, and you also set up media types so notifications have somewhere to go. Templates shortcut a lot of this. You still have to learn the model to use them well.

The same job on PulseNode

Install is one command per VPS. It drops a single static Go binary, registers a hardened systemd service, and starts pushing metrics outbound over HTTPS about every 30 seconds. The agent never listens on a port. There is no server component on your side; the dashboard already exists and we run it.

Alerts take a couple of minutes of clicking rather than zero. You connect a channel in settings, an email address or a Telegram chat ID (no bot server to host), then add threshold rules like cpu > 85% or disk > 90%, with per-rule cooldowns and recovery notifications. The one alert that needs no rule is agent-offline: once a channel is set, a built-in dead-man's switch fires if a server stops reporting.

The agent collects per-core CPU and load average, RAM and swap, disk per mount with read/write throughput, network per interface, and uptime. It lists Docker containers with status, image, and uptime, and shows open TCP and UDP ports with the owning process. Charts cover 1h, 6h, 24h, and 7d windows, with 14d and 30d on Pro.

Simple Zabbix alternative vs the real thing, feature by feature

Sources: the Zabbix features, requirements, license, and cloud pricing pages, checked July 2026. The PulseNode column was verified against the product the same week.

Where Zabbix is simply the right answer

The list of places Zabbix wins is long:

• Network gear. SNMP v1/2c/3 polling and trapping is core Zabbix territory.
• Out-of-band hardware monitoring via IPMI.
• Mixed fleets. The features page lists Windows, Solaris, AIX, macOS, and BSD alongside Linux.
• Protocol breadth: JMX, ODBC, Modbus, MQTT, SSH and Telnet checks, web monitoring.
• Scale. Zabbix positions itself for millions of metrics from hundreds of thousands of devices.
• Alerting depth: trigger expressions on any item and unlimited escalation steps.
• Hundreds of community templates and auto-discovery of hosts and services.
• Self-hosting mandates. If your data cannot leave your network, a hosted tool is disqualified.
• The software costs nothing. Zabbix is AGPLv3 since 7.0 (GPLv2 up to 6.4), free for commercial use; the company sells support contracts and a cloud service, not licenses.

Versions, as of this writing: the current stable release is Zabbix 7.4; the 7.0 LTS has full support until mid-2027 and limited support until 2029; Zabbix 8.0 LTS is in beta and expected in Q3 2026. Five years of LTS support is a maintenance commitment few small tools can match, ours included.

If two or more of the bullets above describe your setup, close this tab and install Zabbix 7.0 LTS. A Linux-only threshold monitor cannot do your job.

Where PulseNode wins: the five VPS case

Now the other reader: a SaaS on three cheap cloud boxes, or a dozen client servers you keep alive. Everything is Linux and nothing speaks SNMP. The questions you ask are small: is the disk filling, and did the box stop responding at 3am.

For this setup, Zabbix costs more than it gives back. The monitoring VPS sized to the docs' example can cost more per month than some of the machines it watches. The stack wants updates on Zabbix's own cadence: two standard releases between each LTS, roughly every six months, each supported for 12 months. An unattended Zabbix is an unpatched Zabbix, and an unpatched PHP frontend on the public internet is a liability.

Here PulseNode wins on the things that come from having no hub at all:

• Nothing to host, patch, back up, or size. The dashboard runs on our infrastructure, so when one of your boxes dies the agent-offline alert still goes out.
• A strictly outbound agent: it never opens a port, so there is nothing new to firewall.
• Alert setup measured in minutes rather than in a data model.
• Docker containers and open ports (with the owning process) from every server on one screen, with zero template work.
• A flat bill of €5 or €15 a month, with nothing metered.

What PulseNode does not do

Read this list before paying us anything:

• No SNMP, no IPMI, no network devices. Linux servers only, amd64 and arm64; there is no Windows, macOS, or BSD agent.
• No custom items, no trigger expressions, no escalation chains, no auto-discovery, no templates. Alert rules cover exactly three metrics: CPU, RAM, and disk percent. The disk rule watches whichever mount is fullest; you cannot target a specific mount.
• Docker is visibility only: status, image, and uptime across your servers. PulseNode does not notify you when a container stops.
• External HTTP(S) and TLS-expiry checks are status only. The dashboard shows up/down, latency, and days to certificate expiry, and sends no notifications for them today.
• History is short: 7 days on Hobby, 30 days on Pro. Zabbix keeps whatever your database can hold.
• No public API and no data export today, so you cannot migrate Zabbix history in or take PulseNode history out.
• Closed source, hosted only, one founder. Support is personal and fast, and it is one inbox.

What the money actually compares to

Zabbix the software costs nothing, commercial use included. Its real cost is a server you rent and hours you spend. If your time is free and you enjoy the work (plenty of homelabbers do), that price is hard to beat.

For everyone else, the managed comparison is fairer. Zabbix Cloud, the official hosted offering, starts at $50/mo for the Nano tier and runs up to $5,000/mo per the pricing page. Even Zabbix prices "someone else runs it" at ten times our Hobby plan, for far more capability.

PulseNode has two flat plans, billed through Lemon Squeezy, VAT added at checkout, cancel anytime:

• Hobby, €5/mo: up to 5 servers, 7-day history, live dashboard and charts, alert rules to email and Telegram, external HTTP(S) and TLS-expiry status checks.
• Pro, €15/mo: up to 20 servers, 30-day history, everything in Hobby, direct founder support.

Get Hobby for €5/mo Get Pro for €15/mo

Trying it without burning the boats

The PulseNode agent pushes outbound over HTTPS and never listens on a port, so it cannot collide with the Zabbix agent on the same box. Install it on a server or two with the one command, connect Telegram or email, add a cpu rule and a disk rule, and run both stacks for a week.

If the small tool answered every question you asked that week, you have your answer. If you kept opening Zabbix for SNMP graphs or escalation chains, you also have your answer, and it is the free one. Caveats to weigh before paying: Linux amd64 and arm64 only, no API or export, and a product young enough that the founder answers the support email personally.

See also

More on the comparison hub: PulseNode vs Prometheus + Grafana is the other heavyweight people outgrow, and PulseNode vs Beszel is the self-hosted option we like most for small setups. There is also a walkthrough on getting an alert before a Linux disk fills up, and the docs cover the agent install in detail.