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.

  • 1
    Kamatera

    Kamatera

    Kamatera

    Kamatera’s cloud firewall solutions provide protection from attacks on cloud servers and private cloud networks. Our cloud security experts set up cloud firewalls and monitor your server’s activity in real time. We help shield your data by analyzing and filtering data packets to identify source, destination, and content, exclusively authorizing the entry of certified and approved data packets to your servers. Our highly secure cloud firewalls are an all-in-one solution, as they are compatible with all virtual appliances to deliver comprehensive protection. Kamatera’s cloud firewalls can also function as a hardware VPN server and act as a checkpoint for all network traffic. This eliminates the need for additional VPN services. Due to versatility and infinite scalability options, our cybersecurity services are perfect for individuals, SMBs, and enterprise-level companies. One single cloud firewall can protect your entire cloud infrastructure.
    Starting Price: $4 per month
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  • 2
    Cloudflare

    Cloudflare

    Cloudflare

    Cloudflare is the foundation for your infrastructure, applications, and teams. Cloudflare secures and ensures the reliability of your external-facing resources such as websites, APIs, and applications. It protects your internal resources such as behind-the-firewall applications, teams, and devices. And it is your platform for developing globally scalable applications. Your website, APIs, and applications are your key channels for doing business with your customers and suppliers. As more and more shift online, ensuring these resources are secure, performant and reliable is a business imperative. Cloudflare for Infrastructure is a complete solution to enable this for anything connected to the Internet. Behind-the-firewall applications and devices are foundational to the work of your internal teams. The recent surge in remote work is testing the limits of many organizations’ VPN and other hardware solutions.
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    Starting Price: $20 per website
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  • 3
    enforza

    enforza

    enforza

    The cost-effective alternative to AWS Network Firewall, Azure Firewall, and cloud-native NAT Gateways. Same features. Less cost. No data processing charges. enforza is a cloud-managed firewall platform that helps you build a unified multi-cloud perimeter with powerful firewall, egress filtering and NAT Gateway capabilities. With easy cloud management at its core, enforza is truly multi-cloud, enabling you to apply consistent security policies across multiple clouds and regions. - Install the agent on *your* linux instance (cloud or on-prem) with one command. - Claim your device on the portal. - Manage your policies.
    Starting Price: $39/month/gateway
  • 4
    Linode

    Linode

    Linode

    Simplify your cloud infrastructure with our Linux virtual machines and robust set of tools to develop, deploy, and scale your modern applications faster and easier. Linode believes that in order to accelerate innovation in the cloud, virtual computing must be more accessible, affordable, and simple. Our infrastructure-as-a-service platform is deployed across 11 global markets from our data centers around the world and is supported by our Next Generation Network, advanced APIs, comprehensive services, and vast library of educational resources. Linode products, services, and people enable developers and businesses to build, deploy, and scale applications more easily and cost-effectively in the cloud.
    Starting Price: $5 per month
  • 5
    UltraDNS

    UltraDNS

    Vercara

    UltraDNS is an enterprise grade, cloud-based authoritative DNS service that securely delivers fast and accurate query responses to websites and other vital online assets. Enterprise grade, managed authoritative DNS service that ensures 100% website availability along with built-in security for superior protection. In a connected world, as Internet users expect seamless and secure online experiences, DNS has become more difficult and complex to manage than ever before. The emergence of IoT devices and online threats leave businesses struggling to find the correct DNS strategy for their IT needs. Having the experience and DNS know-it-all in-house is nearly impossible, let alone having the dedicated resources to correctly manage and implement a sound strategy to meet today’s Internet demands. Ensure that your website and other online assets are always available. Backed by our 100% uptime guarantee and industry leading SLAs, UltraDNS offers a global platform.
    Starting Price: $49.00 per month
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