List of the Top 20 Firewall Software for Windows in 2025

Heimdal® Endpoint Detection and Response is our exclusive multi-faceted service that offers exceptional capabilities for prevention, threat hunting, and remediation. This service integrates the most cutting-edge threat-hunting technologies available, including Heimdal Next-Gen Antivirus, Heimdal Privileged Access Management, Heimdal Application Control, Heimdal Ransomware Encryption Protection, Heimdal Patch & Asset Management, and Heimdal Threat Prevention. With six modules functioning together harmoniously under a single platform and agent, Heimdal Endpoint Detection and Response provides comprehensive cybersecurity layers necessary for safeguarding your organization against both familiar and unfamiliar online and internal threats. Our advanced product enables rapid and precise responses to complex malware, ensuring that your digital assets are protected while also maintaining your organization's reputation. By consolidating these capabilities, we deliver an efficient solution that addresses the evolving challenges of cybersecurity effectively.

To effectively combat ransomware, IT professionals must implement strategies that go beyond merely monitoring for threats. ThreatLocker offers a solution by minimizing attack surfaces through policy-driven endpoint security, shifting the focus from just blocking recognized threats to preventing anything that isn’t expressly permitted. By incorporating features like Ringfencing and other robust controls, organizations can bolster their Zero Trust framework and effectively thwart attacks that exploit existing resources. Explore the comprehensive suite of ThreatLocker’s Zero Trust endpoint security solutions, which includes Allowlisting, Ringfencing, Elevation Control, Storage Control, Network Access Control, Unified Audit, ThreatLocker Ops, Community, Configuration Manager, and Health Center, to enhance your cybersecurity posture today. This proactive approach not only safeguards your network but also empowers your team to maintain greater control over security protocols.

Kamatera offers robust cloud firewall solutions designed to safeguard cloud servers and private networks from cyber threats. Our team of cloud security professionals is adept at configuring firewalls and continuously monitoring server activities in real-time. By thoroughly analyzing and filtering data packets, we effectively identify their source, destination, and content, ensuring that only verified and authorized packets gain access to your servers. Our cloud firewalls provide a comprehensive, all-in-one security solution, compatible with a variety of virtual appliances to ensure extensive protection. Additionally, Kamatera's cloud firewalls can serve as a hardware-based VPN server, managing all network traffic and negating the need for separate VPN services. With their flexibility and limitless scalability, our cybersecurity offerings cater to individuals, small to medium-sized businesses, and large enterprises alike. One cloud firewall is capable of securing your entire cloud infrastructure, making it an ideal choice for various organizational 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.

ZoneAlarm for Business provides a robust, adaptable, and thorough suite of solutions aimed at unmanaged enterprises like small companies, telecom providers, government bodies, and other organizations with limited IT capabilities. Featuring straightforward deployment and maintenance, ZoneAlarm for Business simplifies access to Check Point’s powerful multi-platform security and assistance. ZoneAlarm Extreme Security NextGen stands as the all-encompassing, top-tier security solution for PCs and mobile devices, tailored to meet every aspect of your business's security requirements by leveraging Check Point’s state-of-the-art enterprise-level technology. Its next-generation antivirus includes award-winning Anti-Ransomware, advanced phishing safeguards, and a secure browsing experience. Our sophisticated cybersecurity offerings deliver business-grade protection, successfully defending millions of personal computers and mobile devices from the most recent global cyber threats. This formidable tool excels at detecting harmful files and cyber threats that often slip past conventional antivirus solutions, ensuring a higher level of security for users. As cyber threats continue to evolve, businesses must remain vigilant and proactive in their defense strategies.

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.

A multilayered endpoint security system that employs behavior-based analysis provides powerful protection against both known and new threats. It ensures thorough real-time monitoring of your entire software ecosystem, no matter where it is located. Designed specifically for small to medium-sized businesses, the FortiClient endpoint protection service is offered through the cloud. This integrated endpoint protection platform features automated next-generation threat defense, allowing for visibility and control over your software and hardware assets within the larger security infrastructure. It facilitates the detection and correction of vulnerable or compromised systems across your attack surface, enhancing overall safety. As a vital part of the Fortinet Security Fabric, FortiClient links endpoints to improve the early detection and prevention of complex threats. Security incidents, such as zero-day malware attacks, botnet discoveries, and identified vulnerabilities, are relayed in real time. By adopting this all-encompassing strategy, the solution not only protects your assets but also simplifies the management of security protocols, ensuring a more secure operational environment. Furthermore, this proactive approach enables organizations to stay ahead of potential threats, fostering a culture of resilience against cyber risks.

Avast Small Business Solutions provide cutting-edge endpoint protection for Windows PCs, Macs, and Windows servers, all manageable from any web browser. With confidence, you can focus on your operations knowing that your small business is supported by robust cybersecurity specifically designed for its needs. Your IT security can be remotely managed thanks to cloud capabilities, sophisticated AI, and a worldwide network for threat detection. The offerings under Avast Small Business Solutions include: * Avast Essential Business Security, which provides device protection for small enterprises seeking remote oversight and centralized defense against viruses, phishing, ransomware, and sophisticated cyber threats. * Avast Premium Business Security, which merges advanced antivirus technology with VPN and USB control, ensuring that your employees and their devices maintain greater privacy and security both online and offline. * Avast Ultimate Business Security, encompassing our award-winning next-gen antivirus along with online privacy solutions and automated patch management software to ensure that your devices, data, and applications remain up-to-date and protected. In addition to these features, Avast continually updates its solutions to adapt to new cyber threats, ensuring that your business remains resilient in the face of evolving challenges.

The pfSense initiative offers a cost-free network firewall solution, built upon the FreeBSD operating system and featuring a tailored kernel. Additionally, it encompasses various third-party open-source software packages. Thanks to its package management system, pfSense can deliver functionalities that rival or exceed those of standard commercial firewalls, all without any imposed restrictions. As a result, it has supplanted numerous leading commercial firewalls in installations worldwide, such as those from Check Point, Cisco PIX, Cisco ASA, and Juniper, demonstrating its growing popularity and reliability in the cybersecurity landscape. This shift reflects the increasing trust users place in open-source solutions for their network security needs.

Fortinet emerges as a key global player in the cybersecurity sector, notable for its comprehensive and integrated approach to safeguarding digital infrastructures, devices, and applications. Founded in 2000, the organization provides a wide range of products and services, including firewalls, endpoint protection, intrusion prevention systems, and secure access solutions. A cornerstone of its offerings is the Fortinet Security Fabric, a unified platform that seamlessly combines various security tools to enhance visibility, automation, and provide real-time threat intelligence across the entire network. Renowned for its dependability among businesses, government agencies, and service providers worldwide, Fortinet prioritizes innovation, scalability, and performance, thereby reinforcing its defenses against the constantly shifting landscape of cyber threats. In addition to its protective capabilities, Fortinet’s dedication to enabling digital transformation and ensuring business continuity highlights its essential role within the cybersecurity landscape, positioning itself as a trusted partner for organizations striving to navigate modern security challenges effectively. With a focus on proactive measures and cutting-edge solutions, Fortinet continues to adapt and evolve to meet the demands of an increasingly complex digital world.

Conventional packet filters are slowly losing relevance as the trend shifts towards Next-Generation Firewalls, even among open-source solutions. Among these, OPNsense emerges as a prominent choice, offering features such as intrusion detection, application management, web filtering, and antivirus protection. Every network, regardless of scale, faces threats; even devices in domestic settings, like smartwatches and washing machines, are vulnerable and require strong security protocols. Firewalls are essential components of a holistic security approach, providing protection against both traditional and novel threats. To ensure a firewall's effectiveness, it is crucial to have a thorough understanding of its features, make sure it is user-friendly, and position it strategically within the network. OPNsense meets these vital criteria through various functionalities, making it a formidable solution. This book is designed to be an essential resource for those interested in grasping, installing, and configuring an OPNsense firewall efficiently. By delving into the complexities of OPNsense, users can significantly enhance their digital security posture. Additionally, the insights provided will empower individuals to navigate the evolving landscape of cybersecurity with confidence.

Data represents the most crucial asset for any organization, making its protection paramount. Embracing a zero-trust philosophy is essential for network security, as it necessitates skepticism towards all users, whether they are external or internal. The landscape of network security is increasingly challenging due to the merging of network boundaries and the steady rise of numerous endpoints. Additionally, the sophistication of cyberattacks has escalated with the introduction of machine learning and automated methods. To safeguard their information in both hybrid cloud and on-premises settings, companies are transitioning towards cloud solutions that do not introduce extra costs or complexities. A significant advancement in achieving secure environments lies in the integration of micro-segmentation alongside real-time network governance. By selecting the appropriate software solutions, organizations can enhance their security posture through effective automation and data management. Furthermore, ditno is a cybersecurity management platform that provides a zero-trust network framework, facilitating enhanced security while streamlining processes. This approach not only fortifies defenses but also promotes a culture of vigilance within the organization.

Xvirus Firewall is designed as a user-friendly solution that enables individuals to oversee all active connections and effectively manage access rights. Through an uncomplicated method, it makes use of whitelisting and blacklisting techniques to control connections. However, it does not offer configurable options or sophisticated features for assessing connection validity. This straightforwardness appeals to novices while still delivering adequate functionality for seasoned users. Whether one prefers to install it and run it in the background or customize the settings for a tailored experience, Xvirus Firewall ensures strong security in either case. Additionally, with the aid of Xvirus' Network Monitor, users can retrieve extensive details regarding their application's connections, such as protocol, IP address, port number, connection status, and process ID. By regulating which applications can function on their systems, Xvirus Firewall empowers users to take charge of their security. Its easy-to-navigate rules list allows users to quickly identify which programs to permit or block, resulting in a hassle-free security management process. Ultimately, Xvirus Firewall achieves a harmonious blend of accessibility and control, positioning itself as an essential tool for anyone aiming to bolster their system’s security while also being capable of adapting to their specific needs. With its intuitive interface, users can feel confident in their ability to maintain a secure environment without the need for extensive technical knowledge.

Comodo Advanced Endpoint Protection offers a stellar anti-malware suite that meticulously protects your servers, workstations, laptops, and netbooks, while also providing advanced, real-time monitoring and management of crucial system resources. It can function as a complete security solution or as a standalone sandbox to boost existing antivirus programs, making Comodo ESM a leading option for endpoint defense on Microsoft Windows systems, including servers, desktops, laptops, and tablets. The full Comodo Endpoint Security suite features five layers of protection—Antivirus, Firewall, Host Intrusion Prevention, Auto-Sandbox, and File Reputation—operating at the user level right on the desktop. Its cutting-edge auto-sandbox technology effectively blocks malware infections and prevents damage to the operating system by running untrusted processes in a controlled environment. Additionally, Comodo's endpoint security is uniquely recognized as the only managed anti-malware solution that includes a limited warranty of $5,000 against malware infections, reinforcing its dedication to user security. By merging these advanced functionalities, Comodo ensures users benefit from a strong and dependable defense against the ever-changing landscape of cyber threats, instilling confidence in their digital safety.

WAPPLES SA is a software appliance that functions as a virtual web application firewall (WAF), designed for easy integration into cloud infrastructures and various virtual environments. This solution is particularly beneficial for businesses including hosting companies and data centers, along with small to medium-sized enterprises like managed security service providers or those operating private cloud setups. Additionally, WAPPLES SA is compatible with leading hypervisors, such as XenServer and KVM, making it a versatile choice for diverse deployment needs. Its adaptability and robust security features help organizations effectively safeguard their web applications against potential threats.

Bit Guardian Firewall is an all-encompassing security solution designed to provide users with a secure and smooth online surfing experience. It proactively protects against harmful content by detecting and blocking malicious URLs while also filtering out unwanted applications and websites. Thanks to its built-in ad-blocking functionality, users can enjoy browsing without interruptions from distracting or potentially dangerous ads. Additionally, it safeguards user privacy by reducing online tracking, allowing individuals to visit their favorite sites without fear of surveillance. To enhance its security measures, the firewall utilizes Avira's extensive malware databases, establishing a strong defense against both online and offline threats. This firewall software is specifically tailored for compatibility with Windows operating systems and is produced by Bit Guardian GmbH, a well-respected software development company based in Gräfelfing, Germany. Its consistent updates and customer support make it a compelling choice for anyone seeking to strengthen their digital security. Ultimately, Bit Guardian Firewall stands out as an essential tool for users who prioritize safety and privacy in their online activities.

Bolster the security of your small to medium-sized business by implementing a firewall that is specifically engineered to detect threats, eradicate viruses, and create a secure VPN. Configuration is a breeze with intuitive traffic rules that allow you to control incoming and outgoing traffic according to various parameters like URL, application, and type of traffic. The Snort system provides real-time surveillance for any suspicious activities, enabling you to log or block traffic depending on its severity. It plays a crucial role in thwarting viruses, worms, Trojans, and spyware from breaching your network. In addition to file scans for malicious code, Kerio Control performs thorough analysis of network traffic to spot potential attacks, thereby reinforcing your overall security strategy. Establishing quick and secure server-to-server connections among your offices is easy with Kerio Control’s user-friendly VPN configuration, while remote offices without Kerio Control can still connect seamlessly by utilizing standard VPN protocols. This comprehensive strategy not only fortifies your network but also ensures optimal performance across all connections, allowing for smooth business operations without compromising security. Ultimately, investing in these advanced systems can lead to peace of mind as you focus on growing your business.

CrowdSec is a collaborative and open-source intrusion prevention system that not only analyzes behavioral patterns but also effectively responds to attacks while sharing valuable intelligence within its community. With a larger presence than cybercriminals, it empowers users to develop personalized intrusion detection systems by employing behavioral scenarios to detect potential threats. Users can take advantage of a crowdsourced and curated cyber threat intelligence platform to enhance their security measures. Additionally, you can specify the types of remediation actions you want to implement and utilize the community's IP blocklist to automate your protective strategies. CrowdSec is versatile and can be deployed on various platforms, including containers, virtual machines, bare metal servers, or even directly through our API. By working together, our cybersecurity community is actively dismantling the anonymity of cybercriminals, which is a significant advantage we hold. Contributing to this effort is easy, as you can share IP addresses that have caused you trouble to help build and maintain an effective IP blocklist for everyone’s benefit. Notably, CrowdSec's capability to process extensive logs is remarkably efficient, outperforming Fail2ban by a factor of 60, which makes it an indispensable tool in the fight against cyber threats. Through collective effort and shared intelligence, we can create a safer digital environment for all users.

AP Lens serves as a Sandbox browser that enhances network security through DNS Whitelisting, effectively thwarting attacks before they infiltrate your systems. What advantages does AP Lens provide? Web Filtering: Offers a versatile and intuitive way to block unwanted content. Anti-Phishing: Eliminates the risk of similar-looking domains with complete accuracy. Ransomware Defense: Shields your network from cybercriminals while ensuring business applications remain unaffected. Secure Remote Work: Implements VPN technology to uphold internet usage policies. AP Lens Augmented Whitelist: A solution to eliminate 0-Day Attacks. Compliance: Adheres to the regulatory standards required by cybersecurity insurance policies. One-Click Installation: Eliminates the hassle of user setup or updates on their computers. No Maintenance: Prevents malware and phishing threats without the need for continuous oversight. With over two decades of collective expertise in cybersecurity, cloud security, and information protection, our team has successfully served various sectors, including both private and public domains, ensuring robust protection for all clients.

The NGFW TrusGuard has been acknowledged through an extensive market analysis for its advanced technology, superior performance, and dependability. This state-of-the-art firewall delivers vital protections for the business landscape, featuring Intrusion Prevention Systems (IPS), application control, virtual private networks (VPN), command and control (C&C) defense, along with Anti-Virus/Anti-Spam and Data Loss Prevention (DLP) functionalities. TrusGuard provides a wide array of models, addressing needs from entry-level setups to data center specifications, and is built to scale effectively within high-performance networks. It skillfully handles the surge in network traffic thanks to its optimization for high-performance multicore environments, ensuring uninterrupted network stability. The system protects network assets—including websites, database servers, application servers, and client devices—from potential threats using a comprehensive three-tier defense approach. Additionally, it is fully prepared to support IPv6 network environments, greatly enhancing its adaptability. By minimizing the total cost of operation (TCO), it offers a more cost-effective alternative to the integration of several security products. This solution reduces operational and labor costs associated with managing various security tools, ultimately fostering increased productivity and superior network efficiency while upholding a high level of security. As businesses continue to evolve, having a robust and comprehensive security solution like TrusGuard becomes increasingly critical to safeguarding their digital environments.