Best Free Network Security Software of 2026

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. With Control D you can: block malicious threats, block unwanted types of content network wide (ads & trackers, IoT telemetry, adult content, socials, and more), redirect traffic using transparent proxies and gain visibility on network events and usage patterns, with client level granularity. 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.

Unimus is a robust on-premises solution for Network Automation and Configuration Management (NCM) that emphasizes rapid implementation and user-friendly operation. It enhances network security by offering a consolidated view of configurations and notifying you of any unauthorized modifications through immediate alerts. The Compliance Reporting function verifies that configurations align with security standards and auditing necessities. Featuring a comprehensive API for integration with SIEM systems, Unimus enhances situational awareness and facilitates security management. With the Mass Config Push utility, you can schedule firmware upgrades, enabling effective vulnerability remediation across your network. Compatible with over 450 device types from more than 160 manufacturers, Unimus provides a vendor-neutral platform for Network Automation, Change Management, Auditing, and Compliance. It minimizes manual errors, fortifies security measures, and accelerates operational efficiency—all without the need for programming expertise.

ManageEngine OpManager serves as a comprehensive network security monitoring tool that allows for the immediate identification of network irregularities and possible security risks. It oversees device settings, records unauthorized modifications, and verifies adherence to established security protocols. Through its proactive alert system, OpManager pinpoints unusual traffic behaviors, identifies potential weaknesses, and highlights performance concerns, facilitating swift action to reduce threats. Additionally, it seamlessly integrates with firewall and intrusion detection systems, boosting overall network security by providing insights into potential attacks and breaches.

EventLog Analyzer from Manage Engine is the industry's most affordable security information and event management software (SIEM). This cloud-based, secure solution provides all essential SIEM capabilities, including log analysis, log consolidation, user activity monitoring and file integrity monitoring. It also supports event correlation, log log forensics and log retention. Real-time alerting is possible with this powerful and secure solution. Manage Engine's EventLog Analyzer allows users to prevent data breaches, detect the root cause of security issues, and mitigate sophisticated cyber-attacks.

Secure instant messaging system that works over local networks and the Internet. Collaboration tools for employee engagement.

NetFlow Analyzer provides real-time visibility to network bandwidth performance and leverages flow technologies. NetFlow Analyzer provides a comprehensive view of your network bandwidth usage and traffic patterns. It has been used to optimize thousands of networks worldwide. NetFlow Analyzer provides a single solution that analyzes, reports, and collects data about your network's bandwidth usage. NetFlow Analyzer can help you optimize bandwidth usage across more than a million interfaces worldwide. It also provides network forensics, network traffic analysis, and network forensics. To gain control over the most used applications, you can reconfigure policies using traffic shaping via ACLs and class-based policies. NetFlow Analyzer uses Cisco NBAR technology to provide deep visibility into Layer 7 traffic. It can also identify applications that use dynamic port numbers, or hide behind known ports.

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. Our innovative technologies help you stay protected against malware, phishing attacks, inappropriate content, and more. SafeDNS currently serves over 4000 institutions and home users around the world.

CacheGuard product line is based on a core product called CacheGuard-OS. Once installed on a bare metal or virtual machine, CacheGuard-OS transforms that machine into a powerful network appliance . The resulted appliance can then be implemented as different types of Gateways to Secure & Optimize your network. See below a brief description of all CacheGuard appliances. - Web Gateway: gain control over the Web traffic in your organization & filter unwanted Web traffic in your organization. - UTM (Unified Threat Management) : secure your networks against all kind of threats coming from the internet with a Firewall, an Antivirus at the Gateway, a VPN server and a Filtering proxy. - WAF (Web Application Firewall): block malicious requests on your critical Web applications and protect your business. The WAF integrates OWASP rules with the possibility to design your own custom rules. In addition, an IP reputation based filtering allows you to block IPs listed in real time blacklists. - WAN Optimizer : prioritize your critical network traffic, save your precious bandwidth and get High Availability for your internet access through multiple ISP.

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.

NetBird is a cutting-edge open-source platform for Zero Trust Networking, created by engineers specifically for their peers. It offers a streamlined approach to establishing secure private networks by harnessing the powerful WireGuard® protocol. In contrast to conventional VPNs, NetBird facilitates decentralized, low-latency, and high-throughput private networks, all managed through a single console that prioritizes identity-based access control. By integrating effortlessly with your Identity Provider for Single Sign-On (SSO) and Multi-Factor Authentication (MFA), it enables direct, encrypted peer-to-peer connections among devices, servers, and clouds, eliminating central bottlenecks or single points of failure. The lightweight clients allow for easy scalability and enhanced privacy, ensuring that traffic does not traverse management services. NetBird is compatible with numerous integrations, including CrowdStrike, Intune, SentinelOne, pfSense, and others. It is perfectly suited for Zero Trust remote access, multi-cloud connectivity, dynamic posture assessments, comprehensive auditing, and multi-tenant management for Managed Service Providers (MSPs), all accessible from a single, intuitive platform. Furthermore, its focus on security and efficiency makes it an attractive choice for organizations looking to enhance their network infrastructure.

BPROT serves as a comprehensive solution for network control, monitoring, and management. It grants businesses clear insights into their internet activity, facilitating straightforward management of various internet usage aspects. The installation process is user-friendly and efficient, requiring only a simple plug-and-play setup, after which it offers access to crucial information and management features including: - Oversight of internet browsing - Network administration - Email management - Inventory of software and hardware assets - Safeguarding of remote devices - Assessment of vulnerabilities - Web application firewall protection Users can generate detailed reports in real-time or access historical data effortlessly, ensuring that robust protection can be maintained without needing extensive cybersecurity expertise. Ultimately, BPROT empowers organizations to enhance their network security and operational efficiency.

SOC Prime equips security teams with the largest and most robust platform for collective cyber defense that cultivates collaboration from a global cybersecurity community and curates the most up-to-date Sigma rules compatible with over 28 SIEM, EDR, and XDR platforms. Backed by a zero-trust approach and cutting-edge technology powered by Sigma and MITRE ATT&CK®️, SOC Prime enables smart data orchestration, cost-efficient threat hunting, and dynamic attack surface visibility to maximize the ROI of SIEM, EDR, XDR & Data Lake solutions while boosting detection engineering efficiency. SOC Prime’s innovation is recognized by independent research companies, credited by the leading SIEM, XDR & MDR vendors, and trusted by 8,000+ organizations from 155 countries, including 42% of Fortune 100, 21% of Forbes Global 2000, 90+ public sector institutions, and 300+ MSSP and MDR providers. SOC Prime is backed by DNX Ventures, Streamlined Ventures, and Rembrandt Venture Partners, having received $11.5M in funding in October 2021. Driven by its advanced cybersecurity solutions, Threat Detection Marketplace, Uncoder AI, and Attack Detective, SOC Prime enables organizations to risk-optimize their cybersecurity posture.

The way we work has changed. People can now work anywhere and not only from their office. Applications are now hosted in the cloud and not on-premise. The company network perimeter is now distributed across the internet. Traditional, network-centric VPNs for remote access are not only difficult to maintain and outdated, but also expose businesses to security risks. It is expensive and time-consuming to purchase, deploy, and maintain VPN infrastructure. Hackers can expose entire networks if they are unable to secure access at the application level. Twingate allows organizations to quickly implement a zero trust network that is more secure than VPNs. Twingate is a cloud-based service that allows IT teams to quickly set up a software-defined perimeter without having to change infrastructure. It also centrally manages user access to internal apps, no matter if they are in the cloud or on-prem.

enforza is a cloud-managed firewall platform designed to unify multi-cloud perimeter security. It offers robust firewall, egress filtering, and NAT Gateway capabilities, enabling consistent security policies across various cloud environments and regions. By transforming your Linux instances—whether on-premises or in the cloud—into managed security appliances, enforza provides a cost-effective alternative to AWS Network Firewall, Azure Firewall, and native NAT Gateways, all without data processing charges. Key Features: Simplified Deployment: Install the enforza agent on your Linux instance with a single command. Seamless Integration: Register your device through the enforza portal for centralized management. Intuitive Management: Easily create and enforce security policies across multiple environments via a user-friendly interface. With enforza, you can achieve enterprise-grade security without the complexity and costs associated with traditional cloud-native solutions.

Enhance your security posture with LevelBlue USM Anywhere, a cutting-edge open XDR platform tailored to adapt to the dynamic nature of your IT environment and the increasing demands of your enterprise. Featuring advanced analytics, comprehensive security orchestration, and automation capabilities, USM Anywhere provides integrated threat intelligence that accelerates and sharpens threat detection while facilitating smoother response management. Its unparalleled flexibility is highlighted by a wide array of integrations, known as BlueApps, which improve its detection and orchestration capabilities across numerous third-party security and productivity applications. Additionally, these integrations allow for seamless triggering of automated and orchestrated responses, making security management more efficient. Take advantage of a 14-day free trial today to see how our platform can transform your approach to cybersecurity and help you stay ahead of potential threats.

Chariot is the first offensive security platform that can comprehensively catalog Internet-facing assets, contextualize their value, identify and validate real compromise paths, test your detection response program, and generate policy-as code rules to prevent future exposures. We are a concierge managed service and work as an extension to your team to help reduce the burden of daily blocking and tackling. Your account is assigned to dedicated offensive security experts who will assist you throughout the entire attack lifecycle. Before you submit a ticket to your team, we remove the noise by verifying that every risk is accurate and important. Our core value is to only signal when it matters and to guarantee zero false positives. Partner Praetorian to get the upper hand over attackers Our combination of security expertise and technology automation allows us to put you back on your offensive.

Security teams can use the Infocyte Managed Response Platform to detect and respond to cyber threats and vulnerabilities within their network. This platform is available for physical, virtual and serverless assets. Our MDR platform offers asset and application discovery, automated threats hunting, and incident response capabilities on-demand. These proactive cyber security measures help organizations reduce attacker dwell time, reduce overall risk, maintain compliance, and streamline security operations.

AP Lens is a Sandbox Browser designed to enhance network security through DNS Whitelisting, effectively preventing attacks from penetrating the network. What features does AP Lens offer? - Web Filtering: Offers adaptable and user-friendly options for content blocking. - Anti-Phishing: Eliminates look-alike domains with complete precision. - Ransomware Protection: Safeguards the network while allowing business applications to function smoothly. - Secure Remote Work: Implements internet usage policies efficiently without the delays associated with VPNs. - No More 0-Day Attacks: Overcomes the limitations of traditional blacklisting through the AP Lens Augmented Whitelist. - Compliant: Aligns with regulatory standards set forth by cybersecurity insurance policies. - One-Click Installation: Allows for quick setup without requiring extensive user intervention or updates. - No Maintenance: Prevents malware and phishing threats without the need for ongoing oversight. With a foundation built on over 20 years of expertise in cybersecurity, cloud security, and information protection across various sectors, including private banking and public services, our team is equipped to address the evolving challenges in digital security.