List of the Top 25 Free Network Security Software in 2025

Control D is a versatile DNS filtering and traffic redirection service that utilizes advanced Secure DNS protocols such as DNS-over-HTTPS, DNS-over-TLS, and DNS-over-QUIC, while also accommodating traditional DNS. With Control D, users can effectively eliminate harmful threats, restrict various types of undesirable content across the network—including advertisements, trackers, IoT data, adult material, social media, and more—while also redirecting traffic through transparent proxies and monitoring network activities and usage patterns at a client-specific level. Consider it your own personalized Authoritative DNS resolver for the entire Internet, providing you with detailed control over which domains are allowed to be resolved, redirected, or blocked. This capability not only enhances security but also empowers users to tailor their online experience according to their preferences.

Unimus is a comprehensive on-premise solution for Network Automation and Configuration Management (NCM) that prioritizes quick installation and user-friendliness. This platform enhances network security by offering a unified view of configurations and providing real-time alerts for unauthorized changes. Its robust API allows seamless integration with SIEM systems, enhancing overall visibility and supporting security operations. With Compliance Reporting features, Unimus ensures that configurations align with internal security standards and audit requirements. The Mass Config Push functionality facilitates scheduled firmware updates, enabling you to address vulnerabilities throughout your network efficiently, without the need for manual intervention. Supporting over 400 device types from more than 150 different manufacturers, Unimus serves as a vendor-agnostic platform for Network Automation, Change Management, and Configuration Auditing. It minimizes the risk of human errors, bolsters security, and accelerates operational processes, all while being accessible to users without programming expertise.

ManageEngine OpManager serves as a network security monitoring tool that offers immediate identification of network irregularities and possible security risks. It oversees device configurations, observes unauthorized modifications, and guarantees adherence to security protocols. By delivering proactive notifications, OpManager aids in recognizing unusual traffic patterns, identifying potential vulnerabilities, and addressing performance concerns, allowing for swift action to reduce risks. Additionally, it connects seamlessly with firewall and intrusion detection systems, bolstering network security by providing insights into possible attacks and security breaches.

Manage Engine's EventLog Analyzer stands out as the most cost-effective security information and event management (SIEM) software in the market. This secure, cloud-based platform encompasses vital SIEM functionalities such as log analysis, log consolidation, user activity surveillance, and file integrity monitoring. Additional features include event correlation, forensic analysis of logs, and retention of log data. With its robust capabilities, real-time alerts can be generated, enhancing security response. By utilizing Manage Engine's EventLog Analyzer, users can effectively thwart data breaches, uncover the underlying causes of security challenges, and counteract complex cyber threats while ensuring compliance and maintaining a secure operational environment.

Log360 is a comprehensive security information and event management (SIEM) solution designed to address threats across on-premises, cloud, and hybrid environments. Additionally, it assists organizations in maintaining compliance with various regulations like PCI DSS, HIPAA, and GDPR. This adaptable solution can be tailored to fit specific organizational needs, ensuring the protection of sensitive information. With Log360, users have the ability to monitor and audit a wide range of activities across their Active Directory, network devices, employee workstations, file servers, databases, Microsoft 365, and various cloud services. The system effectively correlates log data from multiple sources to identify intricate attack patterns and persistent threats. It includes advanced behavioral analytics powered by machine learning, which identifies anomalies in user and entity behavior while providing associated risk scores. More than 1000 pre-defined, actionable reports present security analytics in a clear manner, facilitating informed decision-making. Moreover, log forensics can be conducted to delve deeper into the origins of security issues, enabling a thorough understanding of the challenges faced. The integrated incident management system further enhances the solution by automating remediation responses through smart workflows and seamless integration with widely used ticketing systems. This holistic approach ensures that organizations can respond to security incidents swiftly and effectively.

Splunk Enterprise is a data platform designed to give organizations total visibility into their operations, security, and infrastructure. It allows businesses to collect and analyze data from virtually any source, whether it’s logs, metrics, or streaming data, enabling proactive monitoring and response. Teams can build powerful dashboards, automate alerts, and track anomalies in real time, ensuring that threats and issues are identified before they disrupt operations. Powered by Splunk AI, the platform goes beyond reporting by predicting risks, uncovering hidden patterns, and enabling data-driven decisions. Splunk’s machine learning apps, such as the AI Assistant and Anomaly Detection toolkit, bring advanced intelligence to IT service management and security workflows. Its flexible architecture scales effortlessly, supporting terabytes of data and over 2,300 integrations with popular enterprise tools. Whether in security operations, IT infrastructure, or digital business monitoring, Splunk unifies data across edge, cloud, and hybrid ecosystems. Customers report dramatic efficiency gains, such as cutting incident workloads by nearly 99% and slashing costs with automation. This ability to connect insights across the enterprise makes Splunk an essential platform for digital resilience. By turning raw data into clear, actionable intelligence, Splunk empowers organizations to act with speed, clarity, and confidence.

A reliable instant messaging platform designed for both local networks and the Internet, facilitating secure communication. Additionally, it includes collaborative tools aimed at enhancing employee interaction and engagement within the workplace.

NetFlow Analyzer offers immediate insights into network bandwidth performance by utilizing flow technologies effectively. This tool delivers an in-depth perspective on your network's bandwidth consumption and traffic behaviors. It has successfully optimized countless networks around the globe. Serving as a unified solution, NetFlow Analyzer examines, reports, and gathers information regarding your network's bandwidth consumption. With the capability to enhance bandwidth management across over a million interfaces globally, it also includes features for network forensics and traffic analysis. By adjusting policies through traffic shaping with ACLs and class-based rules, you can exercise control over the most frequently used applications. Furthermore, NetFlow Analyzer employs Cisco NBAR technology to provide an intricate understanding of Layer 7 traffic. It is also proficient in detecting applications that utilize dynamic port numbers or conceal themselves behind commonly used ports, ensuring comprehensive network management. Ultimately, this tool is essential for maintaining optimal network performance and security.

The CacheGuard product range revolves around a foundational offering known as CacheGuard-OS. When installed on either a physical or virtual machine, CacheGuard-OS effectively converts that system into a robust network appliance. This newly formed appliance can serve multiple functions as various types of gateways that enhance the security and efficiency of your network. Below is a concise overview of the various CacheGuard appliances available. - Web Gateway: exercise control over organizational web traffic and filter out undesirable web access. - UTM (Unified Threat Management): protect your networks from a wide array of online threats using a combination of a firewall, antivirus at the gateway, VPN server, and a filtering proxy. - WAF (Web Application Firewall): prevent harmful requests from reaching your essential web applications and safeguard your enterprise. The WAF incorporates OWASP rules while allowing for the creation of custom rules, along with an IP reputation filtering system that enables the blocking of IPs identified in real-time blacklists. - WAN Optimizer: optimize the flow of your vital network traffic, conserve bandwidth, and ensure high availability for your internet connection through the use of multiple ISPs. Each appliance is designed to address specific network challenges, ultimately providing comprehensive solutions tailored to your organization’s needs.

Keep an eye on the data usage of each application on your computer with GlassWire's detailed network monitoring graph, which allows you to review both sent and received data over time while identifying the connections your PC is making. It effectively identifies spyware, malware, poorly behaving applications, and bandwidth-intensive programs, enabling you to block their connections using its robust firewall. You can also oversee all devices connected to your network and receive notifications when unfamiliar devices attempt to access your WiFi. Additionally, GlassWire alerts you to any network-related modifications to your computer or unusual alterations in your applications that may suggest the presence of malware, ensuring your system remains secure. This comprehensive monitoring helps you maintain control over your network environment and safeguard against potential threats.

SafeDNS is dedicated to fostering a more secure and protected internet space for small to medium-sized businesses, large corporations, internet service providers, managed service providers, original equipment manufacturers, and educational institutions. Our reach spans across the globe, enhancing online safety for millions of individuals across more than 60 nations. With extensive expertise in cybersecurity and DNS filtering, we provide state-of-the-art solutions that ensure your online safety. Our advanced technologies are designed to shield you from threats such as malware, phishing scams, and unsuitable content, among other risks. Currently, SafeDNS supports over 4,000 organizations and individual users worldwide, demonstrating our commitment to a safer digital landscape for all. As we continue to innovate, our goal is to expand our services and enhance protection for even more users in the future.

Cloudflare serves as the backbone of your infrastructure, applications, teams, and software ecosystem. It offers protection and guarantees the security and reliability of your external-facing assets, including websites, APIs, applications, and various web services. Additionally, Cloudflare secures your internal resources, encompassing applications within firewalls, teams, and devices, thereby ensuring comprehensive protection. This platform also facilitates the development of applications that can scale globally. The reliability, security, and performance of your websites, APIs, and other channels are crucial for engaging effectively with customers and suppliers in an increasingly digital world. As such, Cloudflare for Infrastructure presents an all-encompassing solution for anything connected to the Internet. Your internal teams can confidently depend on applications and devices behind the firewall to enhance their workflows. As remote work continues to surge, the pressure on many organizations' VPNs and hardware solutions is becoming more pronounced, necessitating robust and reliable solutions to manage these demands.

Cyberthreats can be effectively eliminated, fostering a sense of security among users. The conventional antivirus solutions are no longer adequate in today's fast-evolving landscape. Malwarebytes proactively detects and neutralizes emerging threats even before traditional antivirus programs are aware of their presence. This advanced software is capable of blocking a wide range of dangers, including viruses, malware, harmful websites, ransomware, hackers, and other risks that standard antivirus programs often fail to address. Organizations of every size are adopting our innovative protection and response methodologies. Unlike traditional antivirus solutions, which tend to lag in addressing new threats, our system employs advanced techniques. Our multi-layered approach incorporates anomaly detection, a form of artificial intelligence, along with behavior matching and application hardening to obliterate previously unseen malware. This proactive strategy sets us apart from conventional antivirus tools and enhances overall cybersecurity. By continuously evolving our defenses, we ensure that users can navigate the digital landscape with greater peace of mind.

TunnelBear offers a more secure online browsing experience by encrypting your connection, thus protecting your activities on any network. To get started, simply open the TunnelBear app, select a country, and switch on the service. Once activated, TunnelBear quietly runs in the background, keeping your data safe from potential threats. Public WiFi can often be a playground for cybercriminals eager to capture sensitive information, such as passwords and personal details, but TunnelBear significantly reduces this threat to bolster your online security. Moreover, internet service providers and network administrators usually have the capability to observe your online behavior; however, with TunnelBear turned on, your internet activities are shielded from their scrutiny. You may also face geographical restrictions on certain content, but TunnelBear can change your virtual location, enabling you to access that content regardless of your actual whereabouts. Additionally, ad companies tend to track your browsing habits using your IP address, but TunnelBear assigns you a new IP address to prevent this tracking. In situations where governments enforce limits on certain websites and applications, TunnelBear can effortlessly navigate around these obstacles by altering your virtual presence, ensuring you have unrestricted access. This comprehensive protection not only enhances your online privacy but also enriches your overall internet experience, allowing you greater freedom in your digital activities. Ultimately, using TunnelBear can empower you to browse the web with confidence and peace of mind.

Enable your team to effectively manage and oversee the security, efficiency, and overall governance of your entire IT infrastructure through a cohesive platform at no cost. The powerful ITarian solution provides an efficient method for operations, boosts productivity, and maximizes the utilization of IT resources. Empower your IT staff with advanced monitoring and management capabilities that enhance their workflow. By seamlessly integrating roles, functions, and tools, IT efficiency is significantly improved. Maintain optimal uptime by proactively identifying and addressing potential issues before they escalate. Automate routine tasks with custom scripts to simplify daily operations, allowing your team to concentrate on strategic projects. This comprehensive strategy not only enhances workflows but also cultivates a culture of innovation within your organization, ultimately leading to a more agile and responsive IT environment. By adopting such a holistic approach, you position your organization to thrive in an increasingly competitive landscape.

NextDNS provides extensive protection against a variety of security threats by efficiently blocking ads and trackers on websites and apps, all while ensuring a safe and monitored internet experience for children across all devices and networks. You have the ability to evaluate your security requirements and personalize your protection by enabling more than ten distinct safety features. By integrating trustworthy threat intelligence feeds that encompass millions of malicious domains and are continually updated, you can significantly fortify your defense strategies. Our system surpasses conventional tracking methods by analyzing DNS queries and responses in real time, which facilitates the rapid detection and prevention of harmful activities. Since there is often a narrow timeframe of just hours between the registration of a domain and its potential use in an attack, our sophisticated threat intelligence framework is specifically designed to identify harmful domains more effectively than conventional security measures. Furthermore, by utilizing the most popular ad and tracker blocklists that feature millions of constantly updated domains, you can successfully eliminate ads and trackers from both websites and applications, including the most advanced ones. In summary, NextDNS equips users with the necessary tools to create a customized and safer browsing environment that meets their individual security needs, thereby enhancing overall online experience.

More than 15,000 companies around the globe rely on OpenVPN's Access Server for a self-hosted VPN solution that securely connects their remote workforce to the company's private network via the internet. This ensures that employees working remotely or in hybrid setups can easily and securely access essential business resources without overwhelming you with extensive setup and maintenance tasks. OpenVPN Access Server provides a comprehensive SSL self-hosted VPN software solution, combining robust OpenVPN server functionalities with enterprise management features, a user-friendly OpenVPN Connect interface, and client software packages that are compatible with Windows, macOS, Linux, and mobile operating systems like Android and iOS. Furthermore, OpenVPN Access Server allows for a variety of configurations, enabling secure and precise remote access to internal networks and private cloud resources, all while offering meticulous access control measures for enhanced security. Additionally, its flexibility and scalability make it an ideal choice for businesses of all sizes looking to maintain high security while managing remote access effectively.

Axence nVision is a comprehensive tool tailored for overseeing IT infrastructure of varying scales. This robust system is packed with an array of features that ensure effective and smooth management of IT environments. Comprising six distinct modules, it offers Network Monitoring for thorough oversight of IT assets, Inventory for swift audits of both hardware and software, and User Activity Monitoring along with Helpdesk capabilities to facilitate responsive technical support. Additionally, Dataguard serves to safeguard sensitive information from potential breaches, while Smarttime provides valuable insights into employee productivity and time management practices. With its diverse functionalities, Axence nVision stands out as an essential resource for IT professionals seeking to optimize their operations.

Through collaboration, we can robustly address cyber threats at every point within an organization, regardless of where the threats arise. Cybereason provides unmatched visibility and accurate detection of both known and unknown dangers, enabling security teams to leverage true preventive measures. The platform delivers extensive context and insights from the entire network, allowing defenders to evolve into proficient threat hunters capable of uncovering hidden attacks. With just a single click, Cybereason significantly reduces the time required for defenders to investigate and remedy incidents, utilizing both automation and guided assistance. By analyzing an impressive 80 million events every second, Cybereason functions at a scale that is 100 times larger than many of its competitors, which leads to a remarkable decrease in investigation duration by up to 93%. This swift capability empowers defenders to tackle new threats in just minutes rather than days, transforming how organizations respond to cyber challenges. Ultimately, Cybereason sets a new benchmark for threat detection and response, fostering a more secure digital environment for everyone involved. Moreover, this innovative approach not only enhances the efficiency of security operations but also promotes a proactive stance in the ever-evolving landscape of cyber threats.

A swift and effective antivirus solution provides extensive defense for your computer against a wide range of malware types, such as cryptolockers, screen blockers, banking trojans, adware, spyware, and potentially unwanted applications. In crafting this product, we meticulously analyzed the modern requirements for antivirus software, resulting in a tool that meets these needs proficiently. NANO Antivirus Sky Scan boasts a cloud-based scanner that can thoroughly examine files for potential threats. Additionally, users of NANO Antivirus Sky Scan benefit from the ability to easily oversee the antivirus software on their devices, promptly check updates on system protection status, and stay informed with the latest news directly from the app. Designed specifically for touchscreen devices, NANO Antivirus Sky Scan significantly improves the user experience while ensuring strong security measures. This cutting-edge solution empowers users to navigate their antivirus features smoothly and with assurance, allowing them to maintain control over their digital safety.

Coro alleviates the constant concerns surrounding overlooked security tools and the overwhelming number of security solutions available. You won't have to sift through everything multiple times a day anymore. With Coro, your security will be monitored continuously, and you will receive alerts when action is necessary. It assesses the potential threats to your organization and takes proactive measures to neutralize them. Moreover, Coro provides guidance on subsequent steps to enhance your security posture. Acting as a central hub for both sensitive and operational data, Coro enables you to implement a diverse array of security, compliance, and governance policies effectively. Every email undergoes thorough scanning for malware, phishing attempts, and ransomware, with threats being automatically neutralized. Additionally, we identify and thwart insider threats, account takeovers, and other harmful activities seamlessly. Each file, email, and data share is meticulously examined for sensitive information such as PII, PCI, and PHI, ensuring that confidential data remains secure and protected from leaks. Ultimately, Coro not only simplifies security management but also empowers organizations to strengthen their overall data protection strategies.

Website monitoring tools that are both user-friendly and effective provide alerts and immediate status updates for essential web services and applications. Thousands of organizations rely on Spiceworks to stay updated on the health of their online services. With the Spiceworks Connectivity Dashboard, installation is straightforward; you can easily deploy the monitoring agent on any server or workstation and set up the URLs for tracking. This system offers real-time insights, allowing you to detect sluggish network connections or overloaded applications, whether they are hosted on-site or in the cloud, before problems escalate or users start reporting issues. Moreover, upcoming features include email notifications for mission-critical web applications, ensuring you are always informed about the status of important apps and devices. You can expect to receive the latest monitoring updates without unnecessary distractions. The platform's intuitive dashboard empowers you to oversee all aspects of your network effortlessly. Additionally, this seamless integration aids in proactive management, helping to maintain optimal performance across your digital landscape.

By merging machine data with contextual insights, a thorough understanding of all potential risks is achieved, leading to Security and Compliance Solutions specifically designed for today's public cloud settings. Cloudnosys adheres to best practice protocols to manage and assess your AWS and Azure services, guaranteeing compliance with security standards. The platform features an easy-to-use dashboard along with in-depth reports, keeping you informed about detected risks categorized by region. Implementing policy guardrails is essential for maintaining security and compliance obligations. You can quickly pinpoint and mitigate risks associated with your resource configurations, network architecture, IAM policies, and more. For instance, keeping an eye on publicly accessible S3 and EBS volumes is crucial. This platform promises thorough governance and effective risk management for all cloud resources. Furthermore, Cloudnosys offers a robust framework for security, compliance, and DevOps automation, systematically examining your entire AWS, Azure, and GCP services for any security and compliance violations. With its proactive monitoring features, the platform not only boosts overall cloud security but also aids in upholding best practices across all cloud environments, ensuring that your organization can operate confidently in the digital landscape.

InstaSafe is transforming the landscape of secure access to contemporary networks through the implementation of Zero Trust principles in its security solutions, which facilitate smooth access to various platforms including cloud applications, SAP applications, on-site data, IoT devices, and numerous innovative use cases. By shifting away from conventional VPN-based ideas of a network perimeter, InstaSafe redefines security by placing the perimeter around individual users and the devices they utilize. This Zero Trust methodology adopted by InstaSafe upholds a "never trust, always verify" stance on privileged access, emphasizing verification independent of network location. Consequently, this approach not only enhances security but also adapts to the evolving needs of modern digital environments.

CySight’s groundbreaking Actionable Intelligence is relied upon by Fortune 500 companies worldwide, providing organizations with a highly efficient and secure solution to address the growing challenges posed by the complexity and scale of contemporary physical and cloud networking. By leveraging cyber network intelligence, CySight enhances the capabilities of network and security teams, allowing them to significantly speed up incident response times by revealing hidden vulnerabilities, scrutinizing network data to identify irregularities, detecting cyber threats, and assessing the usage and performance of assets. Additionally, CySight’s innovative Dropless Collection technique grants unparalleled visibility into vast network data, ensuring that information is stored in the most compact manner possible, which in turn boosts machine learning, artificial intelligence, and automation efforts to maximize the potential of all types of metadata, regardless of size or complexity. This comprehensive approach not only streamlines operations but also empowers organizations to stay ahead in an ever-evolving digital landscape.