Compare the Top Free Network Security Software as of October 2026

What is Free Network Security Software?

Network security software is a type of software that helps protect computers, networks, and data from malicious attacks and unauthorized access. It is typically used by businesses to protect their confidential information and keep systems safe. It can also be used by individuals to protect their personal information and devices from potential threats. Compare and read user reviews of the best Free Network Security software currently available using the table below. This list is updated regularly.

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    ManageEngine OpManager
    OpManager is a network management tool geared to monitor your entire network. Ensure all devices operate at peak health, performance, and availability. The extensive network monitoring capabilities lets you track performance of switches, routers, LANs, WLCs, IP addresses, and firewalls. Monitor the finer aspects of your network: Hardware monitoring enables CPU, memory, and disk monitoring, for efficient. performance of all devices. Perform seamless faults and alerts management with real-time notifications and detailed logs for quick issue detection and resolution. Achieve network automation, with workflows enabling automated diagnostics and troubleshooting actions. Advanced network visualization-including business views, topology maps, heat maps, and customizable dashboards give admins an at-a-glance view of network status. 250+ pre-built reports covering metrics like device performance, network usage, uptime, facilitate capacity planning and improved decision-making.
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    Starting Price: $95.00/one-time
  • 2
    NetFlow Analyzer

    NetFlow Analyzer

    ManageEngine

    NetFlow Analyzer is a comprehensive traffic analysis tool that leverages flow technologies to provide real-time visibility into network bandwidth performance. NetFlow Analyzer is primarily a bandwidth monitoring tool, which has optimized thousands of networks globally, offering a holistic view of your network bandwidth and traffic patterns. NetFlow Analyzer is a unified solution that collects, analyzes, and reports on your network's bandwidth usage, and by whom. NetFlow Analyzer is your partner in optimizing bandwidth usage across a million interfaces globally, as well as providing network forensics and network traffic analysis. Reconfigure policies with traffic shaping via ACLs or class-based policies to gain control of the applications that use the most bandwidth. NetFlow Analyzer leverages Cisco NBAR technology to give you deep visibility into Layer 7 traffic and recognize applications that use dynamic port numbers or hide behind known ports.
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    Starting Price: $245
  • 3
    GlassWire

    GlassWire

    GlassWire

    Instantly see who or what your PC is talking to on GlassWire's network monitoring graph, plus see what your PC may have connected to in the past. Detect spyware, malware, badly behaving apps, and bandwidth hogs, then block their connections. Monitor other PCs on your network and get alerted when new unknown devices join your WiFi. GlassWire warns you of network related changes to your PC, or unusual changes to your apps that could indicate malware. GlassWire offer a Consumer Solution and a Business solution, to suit the needs of both personal users and IT professionals. Among the features: Real-Time Monitoring to keep an eye on active and past network activity Threat. Threat Detection. GlassWire's built-in firewall detects and blocks potential threats. Application Tracking to Identify which applications are using your network and track their usage patterns. Bandwidth Usage, to stay informed about data consumption, And many more!
    Starting Price: $35.88/year/user
  • 4
    SafeDNS

    SafeDNS

    SafeDNS

    At SafeDNS, we are committed to creating a safer and more secure online environment for SMBs, enterprises, ISPs, MSPs, OEMs, and Education. We have a global footprint, making the internet safer for millions of users in over 60 countries. With years of experience in the field of cybersecurity and DNS filtering, we offer cutting-edge solutions to safeguard your digital life. At present, SafeDNS serves more than 4000 businesses and institutions, and tens of thousands of home users worldwide. We do: -Web content filtering. We help you block all dangerous or unwanted websites such as pornography, violence, child sexual abuse and similar categories. -Malware protection. We also have your back against malicious sites trying to breach user devices either with viruses or information theft intent. -Cloud service. Additionally, we provide you with a cloud filtering service that requires no additional hardware purchase or software installation.
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    Starting Price: $0.9/user/month
  • 5
    Malwarebytes

    Malwarebytes

    Malwarebytes

    Crushes cyberthreats. Restores confidence. Traditional antivirus simply doesn't cut it anymore. Malwarebytes crushes the latest threats before others even recognize they exist. We block viruses, malware, malicious websites, ransomware, and hackers that traditional antivirus isn't smart enough to stop. Our cutting-edge protection and response solutions are used by organizations of all sizes around the world. Traditional antivirus fails because it’s slow to react to new threats. And, well, because it’s “dumb.” We use layers of technology like anomaly detection (a cool sort of artificial intelligence), behavior matching, and application hardening to crush malware that hasn’t even been seen before. Alright, so not really like traditional antivirus. Premium protection and privacy for your home computers and devices. Enterprise-grade protection and remediation for organizations large and small.
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    Starting Price: $47.22 per user per year
  • 6
    Splunk Enterprise
    Splunk Enterprise is a powerful platform that turns data into actionable insights across security, IT, and business operations. It enables organizations to search, analyze, and visualize data from virtually any source, providing a unified view across edge, cloud, and hybrid environments. With real-time monitoring, alerts, and dashboards, teams can detect issues quickly and act decisively. Splunk AI and machine learning features predict problems before they happen, improving resilience and decision-making. The platform scales to handle terabytes of data and integrates with thousands of apps, making it a flexible solution for enterprises of all sizes. Trusted by leading organizations worldwide, Splunk helps teams move from visibility to action.
  • 7
    ITarian

    ITarian

    ITarian

    Enable your staff to monitor and manage the security, performance, and administration of your entire IT infrastructure from a single platform—all at no cost to you. The comprehensive and powerful ITarian platform helps you simplify operations, boost productivity, and better utilize IT resources. Provide IT staff with more monitoring and management capabilities. Boost IT productivity with integration between roles, functions, and toolsets. Maximize uptime with proactive detection and resolution capabilities. Automate day-to-day tasks with custom scripts.
  • 8
    EventSentry

    EventSentry

    NETIKUS.NET ltd

    Hybrid SIEM solution combining real-time (event) log monitoring with comprehensive system health & network monitoring provides users with a complete picture of their servers and endpoints. The included security event log normalization & correlation engine with descriptive email alerts provides additional context and presents cryptic Windows security events in easy to understand reports that offer insight beyond what is available from raw events. EventSentry's NetFlow component visualizes network traffic, can detect malicious activity and offers insight into bandwith usage. Keeping track of Active Directory changes is easy with EventSentry's ADMonitor component that records all changes to AD & Group Policy objects and provides a complete user inventory to help identify obsolete accounts. Various integrations & multi-tenancy available.
    Starting Price: $85.00/one-time
  • 9
    Nagios Network Analzyer

    Nagios Network Analzyer

    Nagios Enterprises

    Network Analyzer provides an in-depth look at all network traffic sources and potential security threats allowing system admins to quickly gather high-level information regarding the health of the network as well as highly granular data for complete and thorough network analysis. Network Analyzer provides a central view of your network traffic and bandwidth data as well as potential network compromises. The powerful home dashboard provides an at-a-glance view of critical netflow or sflow data sources, server system metrics, and abnormal network behavior for quick assessment of network health. Users can easily drill down to see specific information on individual IPs, source port, destination port, or any combination thereof. Network Analyzer’s advanced alerting and reporting capabilities provide IT staff with superior awareness of their network. Highly granular, down-to-the-packet data can be accessed and archived for further tracking and analysis.
    Starting Price: $1995.00
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