10 Free Server Monitoring Tools in 2025

Looking for free server monitoring tools? Finding real-time system and performance issues is a top priority to ensure your network and servers run without fault. Monitoring tools provide alerts and allow you to track essential features that will help your organization stay up and running.

And the best part? You can enjoy the best free server monitoring tools, allowing you to save costs and money in the process.

Top 10 free server monitoring tools to keep your systems online

Below are 10 of the best free server and network monitoring tools along with their benefits that you can use in 2025:

1. Prometheus

This is a metric-based monitoring and data management tool that checks and sorts through data on your server.

Key features:

• It can run on Windows, Linus, and Darwin
• Stores time series in a custom format
• Supports 10 languages
• Sends alerts and notifications
• Monitors all features on your server 

2. Grafana Labs

Grafana allows you to use its server monitoring tool without registration which your entire organization can use. 

Key features:

• Comprehensive interactive dashboard
• Available to all members of your team
• Create custom, flexible dashboards
• Encourages collaboration
• Ability to self-manage your installation

3. Zabbix

This open-source tool can monitor your entire infrastructure.

Key features:

• It has network, server, service, cloud, and application monitoring capabilities
• Keeps your data secure
• Ability to scale your entire infrastructure
• Offers alerts and notifications via email and SMS
• 24/7 monitoring and maintaining high availability

4. Nagios Core

This is one of the best free server health monitoring tools available to users. 

Key features:

• It is flexible, allowing it to scale your infrastructure
• Checks scheduling and data processing
• Alerts users of any issues on their server and network
• Check the performance of your network and server
• User-friendly interface

5. Icinga

This is a great open-source monitoring tool for small and big enterprises.

Key features:

• It is highly-customizable
• Integrate various elements on one easy-to-use dashboard
• Round-the-clock monitoring availability
• Keeps various data on your system secure
• Real-time monitoring ensures alerts in a timely manner

6. LibreNMS

It offers server, network, and device monitoring that is available to both IOS and Android.

Key features:

• Get alerts and notifications through various channels including email, SMS, and Slack
• Infrastructure scaling capabilities
• Keeps your system updated
• Offers a user-friendly interface
• Easy to install

7. Paessler PRTG Network Monitor Free Edition

This well-known network monitoring system offers a variety of easy-to-use features. 

Key features:

• Customizable alerts using different channels including Push notifications and emails
• User-friendly interface for your web and mobile devices
• Flexible dashboards
• Available on various platforms
• Ability to monitor your entire server

8. Checkmk Raw Edition

Ensure the health of your network and server system with the raw version of Checkmk.

Key features:

• Automated features
• You can auto-detect server and network issues
• Offers network, server, event, and application monitoring
• Has alert features
• Customizable dashboards

9. Better Stack Basic

This infrastructure monitoring now has a basic version you can take full advantage of.

Key features:

• Allows email and Slack alerts
• Offers SSL monitoring
• Increased security with two-factor authentication
• Offers alerts for MS Teams
• Up to 10 Uptime monitoring

10. Cacti

Enjoy a user-friendly interface with this open-source server monitoring tool.

Key features:

• Detect and fix issues on your server
• Provides notifications to users
• Customizable interface
• Easy-to-use
• Allows SNMP monitoring

Find the right monitoring software for your business needs

Take full advantage of free server and network monitoring tools to ensure the health and peak performance of your systems. This saves you money while maintaining key features of your site. Free server monitoring tools keep you updated on the functionality of the many features of your networks and servers.

At WebFX, we offer a team of developers to maintain your site and ensure that it performs beyond your expectations.

Our web maintenance services include tech support and regular updates that allow your site to run seamlessly and offer a unique user experience.

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