Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · Server Monitoring

Netdata vs Nagios Core

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score Netdata #3 in Server Monitoring 9.2/10 Free plan · 14-day trial Free planFree trial✓ 0 of 3 features Visit Netdata
Nagios Core #8 in Server Monitoring 8.7/10 Free plan Free plan✓ 1 of 3 features Visit Nagios Core

Netdata 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 scoreNetdata · 9.2/10
  • Free planboth
  • Free trialonly Netdata
  • Most featuresNagios Core · 1 of 3

Netdata scores higher on our rubric for server monitoring: 9.2 against 8.7 out of 10; our editors rank them #3 and #8.

Netdata is the better fit for affordable real-time infrastructure visibility. Nagios Core is the better fit for free extensible monitoring with a large ecosystem.

  • Netdata fits best

    Affordable real-time infrastructure visibility

  • 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 Netdata 9.2/10 Visit ↗ Nagios Core 8.7/10 Visit ↗
At a glance
Editor score 9.2 8.7
Ranking #3 in Server Monitoring #8 in Server Monitoring
Best for Affordable real-time infrastructure visibility Free extensible monitoring with a large ecosystem
Pricing model Free plan + paid Free
Starting price $4.50/unit/mo Free plan
Free plan ✓ ✓
Free trial 14 days —
Deployment Cloud, Self-hosted, Desktop, Mobile Self-hosted
Platforms Web, Linux, Windows, macOS, iOS, Android Linux
Support Docs, Community Community, Docs
Integrations 850+ integrations 6 integrations
Built for Solo, Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Netdata 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
  • Per-second metrics with zero-configuration discovery and automated dashboards
  • Monitors servers, VMs, containers, logs, services, and network devices
  • Business adds AI, unlimited retention, RBAC, SSO, and SCIM
  • Free, GPL-licensed, self-hosted monitoring engine
  • Plugin architecture supports custom checks and metrics
  • Integrates with Grafana, Prometheus, Slack, and ServiceNow
Cons
  • Community limits active connected nodes to five
  • Business pricing is node-based and requires annual billing
  • Enterprise On-Premise starts at 200 node licenses
  • 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

Netdata is a distributed observability platform for operations teams, system administrators, DevOps engineers, and SREs. It covers infrastructure metrics, logs, applications, services, virtual machines, containers, and network devices at…

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. NetdataServer Monitoring 9.2Free plan · 14-day trial
  2. Nagios CoreServer Monitoring 8.7Free plan

Strengths and trade-offs

  • Netdata — where it wins

    • Per-second metrics with zero-configuration discovery and automated dashboards
    • Monitors servers, VMs, containers, logs, services, and network devices
    • Business adds AI, unlimited retention, RBAC, SSO, and SCIM

    Where it doesn't

    • Community limits active connected nodes to five
    • Business pricing is node-based and requires annual billing
    • Enterprise On-Premise starts at 200 node licenses

  • 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
  • Netdata9.2/10 · Free plan · 14-day trial

    Affordable infrastructure visibility with per-second metrics, logs, alerts, and AI assistance.

    Visit NetdataFull verdict →
  • Nagios Core8.7/10 · Free plan

    A free, extensible monitoring engine for teams comfortable with self-hosted configuration.

    Visit Nagios CoreFull verdict →

More comparisons

All server monitoring comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update