Best Firewall Software

Firewall Definition:

Firewalls are barriers used to secure networks from hackers, malware, and other attackers. Firewalls come in both hardware and software form, but all provide fortified security between networks and outside threats. IT managers configure firewalls to specific system requirements, ensuring no data is vulnerable. Once implemented, they will monitor firewall tools to ensure security. Smaller companies and personal computers will rarely require hardware firewalls, but large enterprise companies will use hardware firewalls within their own systems to limit access outside the company or between departments. Firewall products will have significant overlap with network security and web security products as they all aim to secure systems and information. Some products may come equipped with vulnerability management tools to detect and defeat threats.

To qualify for inclusion in the Firewall category, a product must:

  • Assess and filter user access
  • Create barriers between networks and the internet
  • Alert administrators when unauthorized access is attempted
  • Outline and enforce security and authentication rules
  • Automate tasks associated with testing or monitoring

Firewall Software Grid® Overview

The best Firewall Software products are determined by customer satisfaction (based on user reviews) and market presence (based on products’ scale, focus, and influence) and placed into four categories on the Grid®:
  • Products in the Leader quadrant are rated highly by G2 Crowd users and have substantial Market Presence scores. Leaders include: Cisco Firewall, Palo Alto Networks Next-Generation Firewall, SonicWall, WatchGuard, and Imperva Incapsula
  • High Performers are highly rated by their users, but have not yet achieved the Market Presence of the Leaders. High Performers include: Barracuda Firewall and Cato Networks
  • Contenders have significant Market Presence and resources, but have received below average user Satisfaction ratings or have not yet received a sufficient number of reviews to validate the solution. Contenders include: Check Point Firewall, FortiClient, and Sucuri
  • Niche solutions do not have the Market Presence of the Leaders. They may have been rated positively on customer Satisfaction, but have not yet received enough reviews to validate them. Niche products include: pfSense
G2 Crowd Grid® for Firewall
High Performers
Market Presence
Compare Firewall Software
    Results: 55

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    Firewall reviews by real, verified users. Find unbiased ratings on user satisfaction, features, and price based on the most reviews available anywhere.

    Firewall solutions from Cisco offer integrated security to help safeguard various network environments.

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    SonicWall real-time breach detection and prevention solutions protect more than one million networks worldwide

    Imperva Incapsula delivers an enterprise-grade Web Application Firewall to safeguard your site from the latest threats, an intelligent and instantly effective 360-degree anti-DDoS solutions (layers 3-4 and 7), a global CDN to speed up your website's load speed and minimize bandwidth usage and an array of performance monitoring and analytic services to provide insights about your website's security and performance.

    Cato Networks provides organizations with a cloud-based and secure global SD-WAN. Cato delivers an integrated networking and security platform that securely connects all enterprise locations, people, and data. The Cato Cloud cuts MPLS costs, improves performance between global locations, eliminates branch appliances, provides secure Internet access everywhere, and seamlessly integrates mobile users and cloud datacenters into the WAN. Based in Tel Aviv, Israel, Cato Networks was founded in 2015 by cybersecurity luminary Shlomo Kramer, who previously cofounded Check Point Software Technologies and Imperva, and Gur Shatz, who previously cofounded Incapsula. The Cato Cloud connects all the enterprise network elements, including branch locations, the mobile workforce, and physical and cloud datacenters, into a global, encrypted and optimized SD-WAN in the cloud. With all WAN and Internet traffic consolidated in the cloud, Cato applies a set of security services to protect all traffic at all times.

    Network security, email security and data loss prevention appliances

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    Integrated endpoint protection that provides automated next-generation threat protection, as well as visibility and control of your software and hardware inventory across the entire security fabric. Identify and remediate vulnerable or compromised hosts across your attack surface.

    Our next-generation firewall classifies all traffic, including encrypted traffic, based on application, application function, user and content. You can create comprehensive, precise security policies, resulting in safe enablement of applications. This lets only authorized users run sanctioned applications, greatly reducing the surgace area of cyber attacks across the organization.

    Sucuri is a managed security service provider for websites. Our cloud-based tools provide complete website security solution, including performance optimization via a CDN, mitigation of external attacks like vulnerability exploits and DDoS attacks, and professional response in the event of security incident. The team provides 24/7/365 customer service with a 97% satisfaction rate, and a median response time of 4 hours.

    Secure, Reliable Connectivity for Hybrid Networks Barracuda NextGen Firewalls are purpose-built for the modern, distributed network in which network performance and availability is as important as security. Unlike traditional port-based firewalls, our firewalls are application-aware, enabling you to regulate application usage and intelligently prioritize network traffic. We offer three series of firewalls, each delivering advanced next-generation performance and protection, yet for distinctly different environments: - The X-Series is designed for small to mid-market organizations that need to quickly and easily deploy a Next Generation firewall. - The F-Series gives network administrators the tools and controls needed to simplify the complex job of ensuring network performance across multiple locations; therefore, it’s ideal for managed service providers and distributed enterprises. - The S-Series focuses on providing simple, secure and scalable remote connectivity for Internet of Things including remote devices, kiosks, ATM machines and micro-offices.

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    Check Point Firewall. The Check Point Firewall Software Blade incorporates all of the power and capability of the revolutionary FireWall-1 solution while adding user identity awareness to provide granular event awareness and policy enforcement.

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    The pfSense project is a powerful open source firewall and routing platform based on @FreeBSD.

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    FortiGate offers a network security platform, designed to deliver threat protection and performance with reduced complexity.

    Our security solution provides fine-grained access comtrol that identifies, mitigates, and fully reports on the sophisticated security threats of the moment

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    Adaptive Security Virtual Appliance is a virtualized network security solution based on the market-leading Cisco ASA 5500-X Series firewalls.

    A Personal Firewall controls network communication in and out of a single users computer and will restrict the communication based on security policies.

    F5 provides solutions for an application world. With F5, businesses deliver the most secure, fast & reliable applications to anyone anywhere at any time.

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    GlassWire's free firewall helps protect your computer, privacy, and data by visualizing your network activity.

    SiteLock, the global leader in website security solutions, is the only provider to offer complete, cloud-based website protection. Its 360-degree monitoring detects and fixes threats, prevents future attacks, accelerates website performance, and meets PCI compliance standards for businesses of all sizes. Founded in 2008, the company protects over 12 million ​websites worldwide. For more information, please visit

    Cloudbric is a cloud-based web security provider, offering an award-winning Web Application Firewall (WAF), DDoS protection, and SSL. Cloudbric offers security primarily to startup and SMB websites that lack cybersecurity experience or can't afford expensive IT security solutions. Cloudbric’s services are free for all websites with less than 4GB of bandwidth per month. We charge based on amount of web traffic, making Cloudbric perfect for SMEs and new startups. Our services are military-grade protection for the little guy.

    NETGEAR ProSAFE business-class VPN Firewalls are ideal for remote/branch offices and telecommuters and deliver full secure network access between headquarter locations, remote/branch offices and telecommuters.

    Avast is the global leader in next-gen cyber security products for consumers and businesses and protects over 400 million people online. Avast offers products under the Avast and AVG brands, that protect people from threats on the internet with one of the most advanced threat detection networks in the world. Avast digital security products are top ranked for mobile, PC and Mac. For businesses, Avast offers comprehensive antivirus security that keeps your devices, data, and employees safe from the latest cyber threats. Work and browse confidently from anywhere knowing your business is completely protected. If you are a MSP or VAR, you can also deliver enhanced managed services to your customers and take your business even further. Just choose from our Avast CloudCare cloud-based protection solution or our full-stack, remote monitoring and management platform.

    The mobilization of workforce has led to demand for anytime-anywhere access to network resources.

    Ultimate enterprise firewall performance, security, and control.

    Alert Logic Threat Manager with ActiveWatch is a cloud-based managed intrusion detection and vulnerability assessment solution.

    AWS WAF is a web application firewall that helps protect web applications from common web exploits that could affect application availability, compromise security, or consume excessive resources.

    The IPCop Firewall is a Linux firewall distribution It is geared towards home and SOHO users.

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    ModSecurity is an Open Source web application firewall developed by Trustwave's SpiderLabs.

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    Tufin Orchestration Suites SecureTrack is a comprehensive firewall and security policy management solution for multi-vendor firewalls, next-generation firewalls and cloud platforms (public, private and hybrid).

    Untangle protects your network with simply powerful solutions for web filtering, policy control, malware protection, bandwidth management and more!

    To deliver next gen firewall functionality for all users, think outside the box

    The Agilio OVS Firewall Software is designed to enable zero-trust stateful security in data centers using OpenStack-based automation. Agilio OVS Firewall Software, combined with Agilio SmartNICs, enable zero-trust stateful security while significantly improving server-based networking performance. Agilio OVS Firewall Software restores valuable CPU cores by offloading OVS and connection tracking (Conntrack) to Netronome's SmartNICs.

    AlgoSec is a business-driven security management solution.

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    Web Application Firewall is a platform that Ppotect website from the malicious attacks, including OWASP Top 10 protection around code injection, HTML injection, directory traversal, command injection, JSON validation, SQL injection and cross-site scripting.

    With Infoblox DNS Firewall you gain proactive network protection against fast-evolving, elusive malware threats that exploit DNS to communicate with command and control (C&C) servers and botnets.

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    FortiGate-VM is a full-featured FortiGate packaged as a virtual appliance.

    HOPZERO's revolutionary approach precludes risk by limiting the movement of packets.

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    Lastline Breach Defender is the only breach protection system that provides a dynamic blueprint of a network breach as it unfolds. This blueprint provides your security teams with complete breach visibility, displaying movement of the attack across your network.

    Protect your email, web, or network traffic from malicious content engineered to evade your existing security controls. You can deploy Lastline Enterprise anywhere you need to improve your protection against advanced malware entering your network:

    N2 Secure Business is a cloud-based DNS security solution offered as a network-based service by internet service providers (ISPs) to protect their enterprise and small and mid-sized business (SMB) customers against the damage caused by cyberthreats, like ransomware, phishing attacks and other malware.

    TippingPoint integrates with the Deep Discovery Advanced Threat Protection Solution to detect and block targeted attacks and malware through preemptive threat prevention, threat insight and prioritization, and real-time enforcement and remediation.

    Acting as your last line of defense, PARANOID protects against threats that bypass your perimeter and endpoint security layers.

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    PoliWall TIG does the heavy lifting needed to reduce your attack surface and stop critical data losses. It is a threat intelligence gateway that blocks up to 90% of IP threats and domain threats before they hit your perimeter. It also stops data exfiltration attempts in their tracks with the same granular, automated and robust outbound filtering. PoliWall, it keeps the storm surge of attacks out and your valuable data in.

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    Entrerprise threat prevention and security intelligence software.

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    PT Application Firewall is a protection solution designed to provide proactive and continuous protection for internet-accessible applications against both known and unknown attacks.

    SANGFOR is a vendor of Web Security, WAN Optimization and Internet Access Management in the Asia Pacific Region.

    The Sepio security suite detects infected peripherals or altered and malicious device behavior, isolates the attack and triggers alerts—stopping the rogue hardware before it can jeopardize normal operations.

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    Designed to provide a complete security solution in a single product, giving you complete protection and visibility in all-in-one.

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    AhnLab TrusGuard integrates firewall, IPS, VPN, anti-virus, and anti-spam security features with a unique self-defense system against DDoS attacks.

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    Try a real firewall - one that doesn't run hacker code. Introducing the future cloud.

    Zenedge's feature-rich web application security platform is 100% cloud-based. It's artificial intelligence based machine learning algorithms effectively protect web applications from cyber attacks. Configured as a reverse-proxy, the Zenedge Web Application Protection platform inspects all traffic destined to your web application origin and identifies and blocks any malicious traffic.

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    Buying Considerations for Firewall Software

    1. Deployment options: Firewall solutions come in many forms. They can protect hardware, software, virtualized infrastructure, and cloud data. Most options on this site will not provide hardware security as their main functionality aside from securing individual endpoints. Endpoint and software firewall will protect user devices and applications from malware and hackers hoping to penetrate your system. Some of these tools will include cloud firewall, but most cloud-focused tools can be found in our Cloud Security Software category. Virtualized environments will be a little trickier since there are many variations and factors, but many firewall solutions can adapt to a range of virtualized environments.
    2. Range of Devices: This era has made the bring-your-own-device (BYOD) practice incredibly popular for businesses of all sizes. The range of laptops, tablets, phones, and other smart devices raises a number of vulnerability concerns. When looking into firewall solutions, be sure they support the range of devices used in your company. If there are a few missing, consider enforcing stricter BYOD guidelines to only allow approved devices. If your company doesn’t practice BYOD, just make sure the devices you distribute to employees are supported by your company’s potential firewall solutions.
    3. Reporting: Reporting can be an incredibly helpful component to your company’s security practices. Some tools will document all kinds of historical data, from logins and access points to penetration attempts and security failures. But some of these tools provide little documentation for your network’s security history. If your business has a dedicated staff, consider getting the tightest security for your sensitive data, and invest in a solution with in-depth reporting features. You will gain information on vulnerability points, event outcomes, and unapproved access attempts to hopefully prevent any business data from leaving your desired locations.
    4. Customization Needs: Customization can mean anything from device support and content filtering to data integration and dashboards. Many tools integrate with identity management software to help manage access better. Other tools may help security staff build custom dashboards to improve monitoring and reporting. Content filtering can prevent users from accessing unapproved websites or visiting dangerous links hidden in emails. Other integrations and plugins can do just about anything you can imagine. Visit prospective products’ integrations lists to see how they match up with your company’s existing IT strategy and software.
    5. Content Gateways: Secure email gateways and secure web gateways help limit user access to dangerous content. This could mean protecting against anything from risky websites to phishing emails. Some firewall solutions provide or integrate with secure gateways, but many don’t. Since human error is most often the cause of security failures, consider these features to limit potentially hazardous content from accessing your network.
    6. Next-generation Firewall (NGFW) Solutions: NGFW solutions are the newest and most all-encompassing firewall solutions available. They provide increased inspection and filtering capabilities to improve reporting and restrict unauthorized access. These tools utilize features like packet filtering, traffic inspection, and identity management integration. They are likely more expensive than traditional firewall solutions, but may equal out in cost through their improved threat prevention.

    Key Benefits of Firewall Software

    With firewall software, you can have:

    • Network and endpoint protection
    • Improved data security
    • VPN, web, and email gateways
    • Event reporting and analysis
    • Peace of mind