Monitoring Tools

Nagios

Enterprise IT infrastructure monitoring software providing visibility across servers, networks, applications, and logs.

Overview

Nagios offers licensed IT infrastructure monitoring solutions with over 25 years of industry presence, enabling proactive detection and resolution of issues across on-premises, cloud, and hybrid environments.

Updated Oct 21, 2026

5 things

What Nagios has

For developers

Programmatic access to the product's data and features for developers.
Run the software on your own servers instead of the vendor's cloud.

Support

A dedicated customer success professional helps customers get more value from the product.
Real people you can contact when you need help with the tool. One of 5 Monitoring Tools tools with human support.

Extras

An educational resource that explains a topic and helps readers build their knowledge.

2 features

Key Features

Infrastructure control
Nagios runs on hardware you control, including in air-gapped and regulated environments.
Custom checks
Any executable that returns an exit code and a status line works as a check.

Pros and cons

Pros

Long-standing industry presence with over 25 years of experience.
Flexible monitoring of diverse IT infrastructure components including servers, networks, and applications.
Node-based licensing provides predictable costs without data volume charges.
Integration of multiple specialized tools for security, network, and log monitoring.
Dedicated customer success managers and premium support features available.

Cons

Pricing and licensing complexity may require consultation for large-scale deployments.
Maintenance and support plans require renewal to maintain premium features and updates.
User interface and configuration may have a learning curve for new users.
Single-instance log server deployments lack redundancy and are not recommended.
Limited free tier suitable mainly for small or trial environments.

As of October 2026

Pricing

Free
Free
2000-Node+
Custom
on request
Multiple Unlimited Nodes
Custom
on request

You?

Be the first to rate Nagios

Your review helps others make better decisions. No account needed. Takes about 10 seconds.

Featured Video

See Nagios at work before you try it.

Watch on YouTube

0 questions

Frequently Asked Questions

Community reviews

Write a review

No written reviews yet. Be the first to share your experience.

Community reviews

Write a review

No written reviews yet. Be the first to share your experience.

5 things

What Nagios has

For developers

Programmatic access to the product's data and features for developers.
Run the software on your own servers instead of the vendor's cloud.

Support

A dedicated customer success professional helps customers get more value from the product.
Real people you can contact when you need help with the tool. One of 5 Monitoring Tools tools with human support.

Extras

An educational resource that explains a topic and helps readers build their knowledge.

2 features

Key Features

Infrastructure control
Nagios runs on hardware you control, including in air-gapped and regulated environments.
Custom checks
Any executable that returns an exit code and a status line works as a check.

Pros and cons

Pros

Long-standing industry presence with over 25 years of experience.
Flexible monitoring of diverse IT infrastructure components including servers, networks, and applications.
Node-based licensing provides predictable costs without data volume charges.
Integration of multiple specialized tools for security, network, and log monitoring.
Dedicated customer success managers and premium support features available.

Cons

Pricing and licensing complexity may require consultation for large-scale deployments.
Maintenance and support plans require renewal to maintain premium features and updates.
User interface and configuration may have a learning curve for new users.
Single-instance log server deployments lack redundancy and are not recommended.
Limited free tier suitable mainly for small or trial environments.

As of October 2026

Pricing

Free
Free
2000-Node+
Custom
on request
Multiple Unlimited Nodes
Custom
on request

You?

Be the first to rate Nagios

Your review helps others make better decisions. No account needed. Takes about 10 seconds.

Featured Video

See Nagios at work before you try it.

Watch on YouTube

0 questions

Nagios

Overview

What Nagios has

For developers

Support

Extras

Key Features

Infrastructure control

Custom checks

Pros and cons

Pros

Cons

Pricing

Nagios pricing plans

Free

2000-Node+

Multiple Unlimited Nodes

Be the first to rate Nagios

Featured Video

Frequently Asked Questions

What Nagios has

For developers

Support

Extras

Key Features

Infrastructure control

Custom checks

Pros and cons

Pros

Cons

Pricing

Nagios pricing plans

Free

2000-Node+

Multiple Unlimited Nodes

Be the first to rate Nagios

Featured Video

Frequently Asked Questions

More in Monitoring Tools

More in Monitoring Tools