Zabbix: Open-Source IT Monitoring for Networks, Servers, and Cloud Infrastructure
Real-time monitoring of IT components and services, such as networks, servers, VMs, applications and the cloud.
At a glance
- What is it?
- Zabbix is an enterprise-class open-source monitoring system that collects metrics from networks, servers, containers, cloud services, and applications, detects problems in real time, and delivers alerts through channels including Slack, email, and JIRA. It is distributed under AGPL-3.0, which has specific obligations for organizations that deploy it as a network service.
- Who is it for?
- Operations teams that need a self-hosted monitoring platform covering network devices, servers, containers, and cloud endpoints in a single tool, with no per-host licensing cost, are the core audience for Zabbix. Organizations that plan to extend or modify Zabbix and offer it as a service to others need to review the AGPL-3.0 obligations before deploying.
- Can I use it commercially?
- Yes, with strict conditions. AGPL-3.0 is a network copyleft licence: if people use a modified version over a network, for example as a hosted service, you must offer them its source code under the same licence.
- Is it still maintained?
- Yes. The repository received new commits within the last day.
- What is it written in?
- Mainly Go Template, according to GitHub's language statistics.
Answers come from the project's GitHub data, last synced on September 30, 2026, and from our analysis. They are not legal advice.
Editorial analysis
What Zabbix Monitors and the Problem It Solves
Zabbix collects performance and availability data from a wide range of infrastructure components. The README lists network devices, servers, virtual machines, Docker and Kubernetes container platforms, cloud infrastructure, databases, web pages, Java ecosystems, application servers, API endpoints, and business applications. The underlying approach covers both agent-based and agentless metric acquisition, so it can operate in environments where installing an agent on every target is impractical.
The core problem Zabbix addresses is having one system that correlates data from all of these source types into a single monitoring view. Without it, operations teams typically run separate tools for network monitoring, server performance, application health, and alerting, and spend significant time correlating problems across those systems. Zabbix provides what the README calls a 'single pane of glass' view: graphs, lists, geomaps, and network topology maps in one interface.
Resource Discovery, Metric Collection, and the Template System
Zabbix can discover network entities automatically and use pre-built integrations (called templates) to begin monitoring them. The README states that templates exist for devices ranging from low-level hardware to SaaS services. This means a newly discovered host can be assigned a template and begin collecting standard metrics without manual configuration of every individual check.
Metric acquisition supports multiple protocols and mechanisms. The Zabbix agent can be installed on a target host for direct operating system metrics. Agentless checks use SNMP, IPMI, JMX, HTTP checks, and external scripts. This flexibility is what allows Zabbix to monitor infrastructure that ranges from a router with no agent support to a Kubernetes cluster.
Root cause analysis is built into the problem detection engine. The README describes this as correlating existing and incoming problems in real time. When multiple symptoms appear simultaneously, Zabbix can identify a root cause event and suppress dependent alerts, which reduces alert noise during an outage.
Alerting, Notifications, and Multitenancy
When a monitored condition crosses a threshold, Zabbix triggers an alert and can deliver it through multiple channels. The README names Slack, JIRA, Microsoft Teams, email, and text messages as notification options. The notification system uses media types that can be configured per team or per severity level, so a critical server alert can go to an on-call phone number while a warning-level disk alert goes to a team Slack channel.
Multitenancy support allows one Zabbix installation to monitor multiple data centers, departments, or customer organizations in a single instance. Distributed monitoring uses a proxy architecture for remote locations behind firewalls, with remote command execution available for remediation. This makes Zabbix viable for managed service providers who want to monitor multiple customer environments from a central platform without exposing the Zabbix server to each customer network.
The SLA calculation feature, mentioned in the README as part of the built-in functionalities, allows teams to track service availability over time against defined targets. This is relevant for operations teams that need to report on uptime to customers or internal stakeholders.
Installing Zabbix: Where to Start
The Zabbix README points to two external resources rather than providing inline installation commands. Downloads are at https://www.zabbix.com/download and the installation manual is at https://www.zabbix.com/documentation/current/en/manual/installation.
The repository itself contains the full source tree, with the server and agent code in src/, database schema files in database/, UI code in ui/, and configuration templates in conf/. The build system uses autoconf (configure.ac and Makefile.am are at the root). Package-based installation from zabbix.com/download is the documented path for most deployments; building from source in this repository is for contributors or specific packaging scenarios.
The README notes that documentation is at zabbix.com/documentation. This means deployment decisions, upgrade procedures, proxy configuration, and template management all live in external documentation rather than inline in the repository.
AGPL-3.0 License and What It Requires
Zabbix is distributed under AGPL-3.0-only, as stated in the COPYING file. AGPL-3.0 is a copyleft license with a network use clause. An organization that modifies Zabbix and makes it available over a network to others is required to provide the modified source code to those users. This is a stricter requirement than GPL, which only triggers on binary distribution. Organizations using Zabbix internally to monitor their own infrastructure without distributing it are not affected by this clause.
For managed service providers who want to offer customized Zabbix monitoring as a service, or for vendors who want to embed Zabbix in a commercial product, the AGPL terms need careful review. Zabbix SIA (the company behind Zabbix) offers commercial licensing as an alternative to AGPL for such cases, as is common with dual-licensed open source projects, though the README itself does not document this arrangement.
Zabbix Versus the Prometheus and Grafana Stack
The most common comparison to Zabbix in modern infrastructure monitoring is the Prometheus and Grafana stack. The qualitative difference is architectural. Prometheus is a pull-based metrics collection system designed primarily for containerized and cloud-native workloads; Grafana is a visualization and dashboarding layer that connects to Prometheus and other data sources. Zabbix is a single integrated system that includes its own collection agents, storage engine, alerting logic, and built-in dashboards.
This means Zabbix is operationally simpler to start with for teams that want one system to configure and maintain, but the Prometheus and Grafana combination is often preferred for Kubernetes-native environments where pull-based collection and the Prometheus exposition format are already standard. Teams running a mix of traditional servers, network devices, and containers may find Zabbix's broader protocol support more practical than assembling multiple exporters for a Prometheus setup.
Another distinction is that Grafana is commonly used as a visualization layer on top of Zabbix data, supported through the Zabbix plugin for Grafana. This means the two are not strictly alternatives in all deployments. Teams that want both a Grafana-style visual layer and Zabbix's collection and alerting engine can use both together. For organizations already running Nagios, Zabbix is a commonly evaluated replacement: both are self-hosted, but Zabbix includes a modern web interface, automatic discovery, and a template system that Nagios-based setups typically require additional plugins or manual configuration to replicate.
Editorial conclusion
Operations teams that need a self-hosted monitoring platform covering network devices, servers, containers, and cloud endpoints in a single tool, with no per-host licensing cost, are the core audience for Zabbix. Organizations that plan to extend or modify Zabbix and offer it as a service to others need to review the AGPL-3.0 obligations before deploying. Teams that prefer a hosted SaaS monitoring solution with a lower operational burden should evaluate Datadog or similar commercial platforms instead. Before deploying, verify that your team can maintain the database and Zabbix server upgrades, since the installation and configuration documentation is at zabbix.com/documentation rather than in the repository README.
Frequently asked questions
What is Zabbix used for?
Zabbix monitors the performance and availability of IT infrastructure including network devices, servers, virtual machines, Docker and Kubernetes containers, cloud services, databases, and web applications. It collects metrics, detects problems in real time, correlates root causes, and delivers alerts through channels like Slack, email, and JIRA.
Is Zabbix completely free?
The open-source version is free to download and use under the AGPL-3.0 license. There is no per-host or per-metric licensing fee. Organizations that need commercial support or a commercial license (for example, to avoid AGPL network-use obligations in a managed service) can purchase those from Zabbix SIA, but the core software itself carries no cost.
Is Zabbix better than Grafana?
They serve different roles. Zabbix is an integrated monitoring system with its own agents, collection engine, alerting, and built-in dashboards. Grafana is a visualization and dashboarding tool that connects to external data sources like Prometheus, InfluxDB, and Zabbix itself. Many teams run both together, using Grafana as the visualization layer on top of Zabbix data.
How do I use Zabbix for network monitoring?
Zabbix discovers network entities using its resource discovery feature and can apply out-of-the-box templates to begin monitoring them without manual per-device configuration. For devices that do not support agent installation, Zabbix uses agentless protocols including SNMP and IPMI. The documentation for configuring network monitoring is at zabbix.com/documentation.
Official sources
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