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Head-to-head · Server Monitoring

Zabbix vs Nagios Core

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score Zabbix #2 in Server Monitoring 9.3/10 Free plan Free plan✓ 0 of 3 features Visit Zabbix
Nagios Core #8 in Server Monitoring 8.7/10 Free plan Free plan✓ 1 of 3 features Visit Nagios Core

Zabbix leads on 0 checks, Nagios Core on 0, and 2 are even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreZabbix · 9.3/10
  • Free planboth
  • Most featuresNagios Core · 1 of 3

Zabbix scores higher on our rubric for server monitoring: 9.3 against 8.7 out of 10; our editors rank them #2 and #8.

Zabbix is the better fit for broad, mature infrastructure monitoring. Nagios Core is the better fit for free extensible monitoring with a large ecosystem.

  • Zabbix fits best

    Broad, mature infrastructure monitoring

  • Nagios Core fits best

    Free extensible monitoring with a large ecosystem

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Zabbix 9.3/10 Visit ↗ Nagios Core 8.7/10 Visit ↗
At a glance
Editor score 9.3 8.7
Ranking #2 in Server Monitoring #8 in Server Monitoring
Best for Broad, mature infrastructure monitoring Free extensible monitoring with a large ecosystem
Pricing model Free plan + paid Free
Starting price €245/mo Free plan
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted Self-hosted
Platforms Web, Linux, Windows, macOS Linux
Support Email, Phone, Tickets, Community, Docs · 24/7 Community, Docs
Integrations 12 integrations 6 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Zabbix 0/3 · Nagios Core 1/3
Server auto-discovery Not checked yet Not checked yet
Process monitoring Not checked yet ✓ (best)
Container monitoring Not checked yet Not checked yet
Specs
Included hosts Not checked yet Not checked yet
Metric retention Not checked yet Not checked yet
Monitoring method Not checked yet Hybrid
Supported operating systems Not checked yet Linux, Unix, Windows
Our review
Pros
  • Free open-source self-hosted edition with no license fee
  • Monitors servers, VMs, services, logs, networks, and containers
  • Extensive cloud, virtualization, container, and ITSM integrations
  • Free, GPL-licensed, self-hosted monitoring engine
  • Plugin architecture supports custom checks and metrics
  • Integrates with Grafana, Prometheus, Slack, and ServiceNow
Cons
  • Self-hosted deployment requires your own infrastructure and administration
  • Cloud Nano is limited to 50 new values per second
  • Silver subscription is billed annually at €245 per month
  • Configuration relies mainly on text files and command-line workflows
  • The platform listing is limited to Linux
  • It lacks a server auto-discovery feature
Our verdict

Zabbix is an open-source infrastructure monitoring and observability platform for IT teams, enterprises, and service providers. It covers servers, networks, applications, databases, virtual machines, containers, cloud services, and system…

Read the review →

Nagios Core is a free, GPL-licensed, self-hosted monitoring engine for IT infrastructure. It monitors servers, workstations, network devices, websites, applications, services, and custom metrics through a plugin-based architecture. Its…

Read the review →
  1. ZabbixServer Monitoring 9.3Free plan
  2. Nagios CoreServer Monitoring 8.7Free plan

Strengths and trade-offs

  • Zabbix — where it wins

    • Free open-source self-hosted edition with no license fee
    • Monitors servers, VMs, services, logs, networks, and containers
    • Extensive cloud, virtualization, container, and ITSM integrations

    Where it doesn't

    • Self-hosted deployment requires your own infrastructure and administration
    • Cloud Nano is limited to 50 new values per second
    • Silver subscription is billed annually at €245 per month

  • Nagios Core — where it wins

    • Free, GPL-licensed, self-hosted monitoring engine
    • Plugin architecture supports custom checks and metrics
    • Integrates with Grafana, Prometheus, Slack, and ServiceNow

    Where it doesn't

    • Configuration relies mainly on text files and command-line workflows
    • The platform listing is limited to Linux
    • It lacks a server auto-discovery feature

More comparisons

All server monitoring comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update