Best Firewall Software

Compare the Top Firewall Software as of June 2025

What is Firewall Software?

Firewall software is a security tool that monitors and controls incoming and outgoing network traffic based on predetermined security rules. Acting as a barrier between a trusted internal network and untrusted external networks, firewalls help prevent unauthorized access and protect against cyber threats. They work by analyzing data packets and determining whether they should be allowed through based on set policies, blocking potentially harmful traffic. Modern firewalls often incorporate advanced features like intrusion prevention, application filtering, and deep packet inspection to strengthen security further. By providing this critical layer of protection, firewall software safeguards sensitive data and ensures the integrity of networked systems. Compare and read user reviews of the best Firewall software currently available using the table below. This list is updated regularly.

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    Heimdal Endpoint Detection and Response (EDR)
    Heimdal® Endpoint Detection and Response is our proprietary multi-solution service providing unique prevention, threat-hunting, and remediation capabilities. It combines some of the most advanced threat-hunting technologies: - Next-Gen Antivirus - Privileged Access Management - Application Control - Ransomware Encryption Protection - Patch & Asset Management - Email Security - Remote Desktop - Threat Prevention ( DNS based ) - Threat Hunting & Action Center With 9 modules working together seamlessly under one convenient roof, all within one agent and one platform, Heimdal Endpoint Detection and Response grants you access to all the essential cybersecurity layers your business needs to protect itself against both known and unknown online and insider threats. Our state-of-the-art product empowers you to quickly and effortlessly respond to sophisticated malware with stunning accuracy, protecting your digital assets and your reputation in the process as well.
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  • 2
    ThreatLocker

    ThreatLocker

    ThreatLocker

    The ThreatLocker suite of security tools are powerful and designed so that everyone from businesses to government agencies to academic institutions can directly control exactly what applications run on their networks. We envision a future in which all organizations can chart their own course free from the influence of cybercriminals and the damage their incursions cause, and our team of veteran cybersecurity professionals created ThreatLocker to make this vision a reality. The team at ThreatLocker has been developing cybersecurity tools for decades, including programs to enhance email and content security, and this is our most innovative and ambitious cybersecurity solution yet. We developed this unique cybersecurity system because we believe that organizations should have complete control of their networks and should not have to live in fear of the next malware attack. To learn more, visit ThreatLocker.com.
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  • 3
    Zscaler

    Zscaler

    Zscaler

    Zscaler, creator of the Zero Trust Exchange platform, uses the largest security cloud on the planet to make doing business and navigating change a simpler, faster, and more productive experience. The Zscaler Zero Trust Exchange enables fast, secure connections and allows your employees to work from anywhere using the internet as the corporate network. Based on the zero trust principle of least-privileged access, it provides comprehensive security using context-based identity and policy enforcement. The Zero Trust Exchange operates across 150 data centers worldwide, ensuring that the service is close to your users, co-located with the cloud providers and applications they are accessing, such as Microsoft 365 and AWS. It guarantees the shortest path between your users and their destinations, providing comprehensive security and an amazing user experience. Use our free service, Internet Threat Exposure Analysis. It’s fast, safe, and confidential.
  • 4
    AhnLab TrusGuard
    The NGFW TrusGuard has been acknowledged by a through market assessment for its technology, performance and stability. The firewall, IPS, application control, VPN, C&C, Anti-Virus/Anti-Spam and DLP protect the business environment. TrusGuard has full lineup from the low-end to data center level models. Scales up to protect high-performance networks. Capable of handling growing network traffic, thanks to optimization for high-performance multicore environments. Ensures network stability. Protects network resources (such as, websites, database servers, applications servers, and client machines) from unknown network attacks with the 3-step defense. Covers IPv6 network environments. Complete support for IPv6 networks. Reduces total cost of operation (TCO). Offers cost cuts compared to integrating multiple security products Relieves operational and labor costs associated with managing multiple security solutions. Increases productivity and network efficiency.
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