Best Free Network Security Software
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Compare the Top Free Network Security Software as of September 2026
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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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1
Control D
Control D
Control D is a customizable DNS filtering and traffic redirection platform that leverages Secure DNS protocols like DNS-over-HTTPS, DNS-over-TLS and DNS-over-QUIC, with support for Legacy DNS. - Block malicious threats - Block unwanted types of content network wide (ads & trackers, IoT telemetry, adult content, socials, and more) - Deploy in minutes on fleets of devices using RMM - Manage clients using sub-organizations - Gain visibility on network events and usage patterns, with client level granularity - Re-route traffic via proxies (through DNS) for improved privacy and security - Enjoy superior UX and simplicity Think of it as your personal Authoritative DNS resolver for the entire Internet that gives you granular control over what domains get resolved, redirected or blocked.Starting Price: $0.5/endpoint -
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ManageEngine EventLog Analyzer
ManageEngine
ManageEngine EventLog Analyzer is an on-premise log management solution designed for businesses of all sizes across various industries such as information technology, health, retail, finance, education and more. The solution provides users with both agent based and agentless log collection, log parsing capabilities, a powerful log search engine and log archiving options. With network device auditing functionality, it enables users to monitor their end-user devices, firewalls, routers, switches and more in real time. The solution displays analyzed data in the form of graphs and intuitive reports. EventLog Analyzer's incident detection mechanisms such as event log correlation, threat intelligence, MITRE ATT&CK framework implementation, advanced threat analytics, and more, helps spot security threats as soon as they occur. The real-time alert system alerts users about suspicious activities, so they can prioritize high-risk security threats.Starting Price: $595 -
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ManageEngine OpManager
ManageEngine
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.Starting Price: $95.00/one-time -
4
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.Starting Price: $245 -
5
MyChat
Network Software Solutions
MyChat is a self-hosted corporate messenger for teams that need private communication, LAN/on-premise deployment, file sharing, calls, task boards, forums, integrations, and admin control without moving company conversations to a public cloud.Starting Price: $8/per user/one-time -
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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 -
7
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.Starting Price: $0.9/user/month -
8
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.Starting Price: $47.22 per user per year -
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NextDNS
NextDNS
NextDNS protects you from all kinds of security threats, blocks ads and trackers on websites and in apps and provides a safe and supervised Internet for kids, on all devices and on all networks. Determine your threat model and fine-tune your security strategy by enabling 10+ different types of protections. Use the most trusted threat intelligence feeds containing millions of malicious domains, all updated in real-time. Go beyond the domain, we analyze DNS questions and answers on-the-fly (in a matter of nanoseconds) in order to detect and block malicious behavior. With usually only a few hours between domain registration and the start of an attack, our threat intelligence system is built to catch malicious domains earlier than classic security solutions. Block ads and trackers on websites and in apps, including the most devious ones. Use the most popular ads & trackers blocklists, millions of domains all updated in real-time.Starting Price: $39 per month -
10
TunnelBear
TunnelBear
A more secure way to browse the web. TunnelBear encrypts your internet connection to keep your online activity private on any network. Just open the TunnelBear app, select a country, and flip the switch. Once you're connected, TunnelBear will work quietly in the background to keep your data secure. Hackers can steal passwords and data over insecure public WiFi. TunnelBear blocks them to keep you secure. Network owners and internet providers can see everything you do online. With TunnelBear on, they can't see a thing. Some content is only available in certain regions. TunnelBear changes your virtual location so you can see it anywhere. Ad services use your IP address to track your behavior across sites. TunnelBear stops them by assigning you a new IP. Some governments block popular websites and apps. TunnelBear unblocks them by changing your virtual location.Starting Price: $59.88/year/user -
11
OpenVPN Access Server
OpenVPN
OpenVPN Access Server is a self-hosted Zero Trust Network Access (ZTNA) and business VPN solution that gives organizations full control over their own secure network. It's software organizations deploy directly into their own environment — on-premises hardware or their own cloud account on AWS, Azure, Google Cloud, or others — with tunnel traffic flowing directly between users and the server. With Access Server Link, teams can go from zero to a fully configured deployment in minutes: point-and-click setup across AWS, Azure, and GCP, automatic SSL certificate provisioning and renewal, and a web-based admin portal for managing users, certificates, and access — no SSH or manual DNS work required. Access is granted per application and per identity using domain names rather than broad network-level access, so users only reach what they're explicitly permitted to, and lateral movement is structurally blocked.Starting Price: Free Up to 2 connections -
12
CacheGuard
CacheGuard Technologies
CacheGuard-OS is a free, open-source Linux-based network security appliance OS that turns any standard x86 machine into a UTM gateway. It sits between your devices and your ISP router, becoming the checkpoint for all internet traffic — no IT team required. Open-source since its first release, CacheGuard-OS includes: stateful firewall, web antivirus (ClamAV), URL filtering, SSL inspection, WAF (ModSecurity), VPN server (StrongSwan), web cache (Squid), QoS (IPRoute2), and WAN load balancing. It installs on bare metal or any common hypervisor in under an hour. Configuration is handled through a web-based admin interface with no command-line expertise needed. Built for small businesses, schools, and sysadmins who need production-grade network security on commodity hardware.Starting Price: $0 -
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Cybereason
Cybereason
Together we can end cyber attacks at the endpoint, across the enterprise, to everywhere the battle moves. Cybereason delivers over-the-horizon visibility and high fidelity convictions of both known and unknown threats so defenders can leverage the power of true prevention. Cybereason provides the deep context and correlations from across the whole of the network to uncover stealthy operations and enable defenders to be expert threat hunters. Cybereason significantly reduces the time required for defenders to investigate and resolve attacks through both automated and guided remediation with just a click of the mouse. Cybereason analyzes 80 million events per second - that’s 100x the volume of other solutions on the market. Reduce investigation time by as much as 93% to eliminate emerging threats in a matter of minutes rather than days. -
14
Spiceworks Network Monitor
Spiceworks
Simple, easy-to-use website monitoring software. Real-time up/down status and alerts for your critical web applications and services. Thousands of businesses use Spiceworks to be alerted on the up/down status of the web applications and services that their end-users need to do their job everyday. Spiceworks Connectivity Dashboard is simple to set up. Install the monitoring agent on any workstation/server, configure the application URLs and start monitoring. Get real-time insights and spot sluggish network connections, or overwhelmed applications – either hosted in your data center or in the cloud – before they crash or users start calling. Coming Soon! Get email alerts when a business critical web application is unreachable by your users: CRM, HR, engineering. Real-time status on critical devices and apps. Get the latest monitoring info without the clutter. Keep an eye on everything within your realm with a single, easy-to-use dashboard.Starting Price: $0.01/one-time/user -
15
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. -
16
InstaSafe
InstaSafe Technologies
InstaSafe is redefining the challenge of secure access to modern networks by leveraging Zero Trust principles with its security solutions, that ensure seamless access to cloud applications, SAP applications, on-premise data, IoT devices, and multiple other neoteric use cases. InstaSafe discards traditional VPN based conceptions of a network perimeter, instead moving the perimeter to the individual users and the devices they access. The Zero Trust approach followed by InstaSafe mandates a “never trust, always verify' approach to privileged access, without focusing on network locality. InstaSafe ZTAA relies on continuously assessing the trust and risk associated with every user, and the context of their access request, and simultaneously employs a system of comprehensive authentication before grnating least privilege access. By only making authorised applications accessible to the user, and not exposing the network to these users, ZTAA serves to negate the exploitable attacks surfaceStarting Price: $8/user/month -
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NetBird
NetBird
NetBird is an open-source Zero Trust Networking platform built by engineers for engineers. It radically simplifies deploying secure private networks using the high-performance WireGuard® protocol. Unlike traditional VPNs, NetBird creates decentralized, low-latency, high-throughput private networks with a single management console for identity-based access control. Integrating seamlessly with your IdP for SSO and MFA, it forms direct, encrypted peer-to-peer tunnels between devices, servers, and clouds - no central bottlenecks or single points of failure. Lightweight clients ensure scalability and privacy, with traffic never passing through management services. NetBird supports integrations with CrowdStrike, Intune, SentinelOne, pfSense, and more. Ideal for Zero Trust remote access, multi-cloud connectivity, dynamic posture checks, detailed auditing, and MSP multi-tenant management - all through one intuitive platform.Starting Price: $5/user/month -
18
Twingate
Twingate
The way we work has changed. People now work from anywhere, not just from an office. Applications are based in the cloud, not just on-premise. And the company network perimeter is now spread across the internet. Using a traditional, network-centric VPN for remote access is not only outdated and difficult to maintain, but exposes businesses to security breaches. VPN infrastructure is costly and time-consuming to procure, deploy, and maintain. Inability to secure access at the app level means hacks can expose whole networks. Twingate enables organizations to rapidly implement a modern Zero Trust network that is more secure and maintainable than VPNs. Delivered as a cloud-based service, Twingate empowers IT teams to easily configure a software-defined perimeter without changing infrastructure, and centrally manage user access to internal apps, whether they are on-prem or in the cloud.Starting Price: $10 per user per month -
19
DuskRise
DuskRise
Connected to the home Wi-Fi router, this IoT device creates a new secure network where potential threats are deterred with lightning-fast speed. Essential for the device set up process, the app also delivers security notifications and insights to raise the cyber-literacy of the end-user. The security dashboard provides complete visibility of the offsite networks and allows to enforce office-grade policy controls in the remote environment. The DuskRise solution is powered by the threat intelligence research and data analysis form the Cluster25 team. Mitigate threats through effective control and prevention filters with strong detection and response mechanics. Leverage on our proprietary AI algorithms to filter noisy network data and detect anomalous behavior on the spot. Form a secure network enclave, creating a segment you can own and secure on any network.Starting Price: Free -
20
CloudFish
CloudFish
Cloud-Fish protects your sensitive data across all platforms and provides your business with a solid defense against cyber-attacks and data breaches. Your sensitive business information, intellectual property assets, and customer data are stored on your employees’ computers, mobile devices, and on external cloud servers that your company uses. Securing this sensitive information is critical to protecting your business from financial risks, regulatory violations, and reputation setbacks. How do you ensure the security of your sensitive data that is dispersed across different platforms? Your company has regional as well as global offshore offices. You have little visibility and control over what is going on in your offshore organization. Who is sharing what information? You need an ability to monitor and an effective mechanism to respond if a cyber-attack or a security violation occurs.Starting Price: $9.09 one-time payment -
21
Themis
Cossack Labs
Secure Cell is a multi-mode cryptographic container suitable for storing anything from encrypted files to database records. Use Secure Cell to encrypt data at rest. Secure Cell is built around AES-256-GCM, AES-256-CTR. Secure Message is a simple encrypted messaging solution for the widest scope of applications. Use Secure Message to send encrypted and signed data from one user to another, from client to server, to prevent MITM attacks and avoid single secret leakage. Based on ECC + ECDSA / RSA + PSS + PKCS#7. Zero-knowledge proof-based protocol to compare secrets over non-trusted channels without risking leaks or reuse attacks. Use Secure Comparator for authenticating the users in a way that no password (or password hash) is sent over the network. Secure Session is a session-oriented encrypted data exchange with forward secrecy for better security guarantees and more demanding infrastructures.Starting Price: $0.01 -
22
VIPole
VIPole
Message editing and deleting, auto-delete messages, chat window clearing and complete history wiping. Disconnecting devices remotely, fake secret phrase, auto lock and auto logout on inactivity. Hidden and blacklist contacts, individual visibility settings for contacts, configurable contact authorization. Assign tasks to yourself and colleagues, track the progress. Store and organize passwords, securely share them with contacts. Foster collaboration by setting goals for the team and monitoring the solved issues.Starting Price: $5.99 per month -
23
AP Lens
AP Lens
AP Lens is a Sandbox Browser that isolates networks using DNS Whitelisting. We stop the attack before it reaches the network. What does AP Lens provide? - Web Filtering: Flexible and user-friendly content blocking. - Anti-Phishing: Stop look-alike domains with 100% accuracy. - Ransomware Protection: Isolate the network without affecting business applications. - Secure Remote Work: Enforce internet usage policies without VPN slowness. - No More 0-Day Attacks: Escape the limits of blacklisting with AP Lens Augmented Whitelist. - Compliant: AP Lens meets regulatory requirements requested by cybersecurity insurance policies. - One-Click Installation: No need for a lengthy setup process or updating from the user's side. - No Maintenance: Stop malware and phishing without continuous monitoring. Our team builds on over 20 years of experience in cyber security, cloud security, and information protection in industries such as private banking and the public sector.Starting Price: $5 -
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Privatoria
Privatoria
If уоu аrе соnсеrnеd аbоut уоur оnlіnе ѕаfеtу, you ѕhоuld trу ѕоmе methods that wіll hide уоur identity. The mоѕt widely uѕеd today аrе thоѕе that hide the ір. Such methods іnсludе the use оf рrоxу servers and software рrоgrаmѕ. VPN is a good tool to keep you safe and anonymous at the same time. It creates a secure and encrypted connection between you and accessed website. When you connect to a VPN server all your traffic goes through an encrypted tunnel and none can see it until it exits the tunnel and accesses a public internet. If you are connecting to websites with HTTPS encryption, your personal data stays secure even when it exits the tunnel. VPN protects information and allows to leave no footprints while surfing the web.Starting Price: $2.74 per user per month -
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Gravwell
Gravwell
Gravwell is an all-you-can-ingest data fusion analytics platform that enables complete context and root cause analytics for security and business data. Gravwell was founded to bring the benefits of usable machine data to all customers: large or small, text or binary, security or operational. When experienced hackers and big data experts team-up you get an analytics platform capable of things never seen before. Gravwell enables security analytics that go well beyond log data into industrial processes, vehicle fleets, IT infrastructure, or everything combined. Need to hunt down a suspected access breach? Gravwell can correlate building access logs and run facial recognition machine learning against camera data to isolate multiple subjects entering a facility with a single badge-in. We exist to provide analytics capabilities to people who need more than just text log searching and need it sooner rather than later at a price they can afford. -
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Comodo cWatch
Comodo Group
The CSOC provides 24/7 security monitoring by certified security analysts and uses state-of-the-art technology. Analysts at the CSOC identify and analyze threats, provide alerting when appropriate to engage clients in resolution and to assist in mitigation. Comodo cWatch CSOC extends your internal IT team's capacity to protect your applications with advanced security solutions that are easy to implement, fully managed and do not require large upfront investments. It is designed to absorb the time-consuming and complex security incident investigation process while offloading the high costs of in-house security staff. With real-time web traffic monitoring and proactive incident identification, our security experts are able to notify organizations and take necessary actions quickly when an attack is detected. Continuous monitoring by Comodo CSOC security experts that have deep expertise in application security monitoring and management.Starting Price: $9.90
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