Portmaster AlternativesOnly apps categorised as Firewalls

The best Firewall alternative to Portmaster is AdGuard, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Portmaster and many of them are Firewalls so hopefully you can find a suitable replacement. Other interesting Firewall alternatives to Portmaster are simplewall, RethinkDNS, GlassWire and Fort Firewall.

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Portmaster alternatives are mainly Firewalls, but if you're looking for Network Monitors or Ad Blockers you can filter on that. Other popular filters include Open Source. These are just examples - use the filter bar below to find more specific alternatives to Portmaster.
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Alternatives list

  1. AdGuard icon

    AdGuard

     283 likes

    Ad-blocking solution eliminating intrusive ads and preventing tracking, with malware protection. Filters pop-ups, banners, and more for clean browsing. Works in the background for ad-free surfing, protects data privacy with Spyware filter, and controls ad display in apps.

    125 AdGuard alternatives

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Vivaldi
    • Google Chrome
    • Safari
    • Yandex Browser
    • Opera
    • Mozilla Firefox
    • Snapcraft
    • Microsoft Edge
    • Android TV
    AdGuard screenshot 1
     
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  5. Ad
    Screenshot
    GlassWire icon
    GlassWire

    Visualizes real-time and historical network activity, delivers alerts for suspicious behavior and unknown connections, manages firewall rules, reports DNS and system changes, identifies remote hosts, monitors app usage, supports ...

    https://www.glasswire.com
    Learn More
  6. GlassWire icon

    GlassWire

     153 likes

    Visualizes real-time and historical network activity, delivers alerts for suspicious behavior and unknown connections, manages firewall rules, reports DNS and system changes, identifies remote hosts, monitors app usage, supports remote monitoring, and detects possible threats.

    68 GlassWire alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application types

    Platforms

    • Windows
    • Android
    • Android Tablet
    GlassWire screenshot 1
     
  7. Fort Firewall icon

    Fort Firewall

     39 likes

    Simple firewall for MS Windows.

    38 Fort Firewall alternatives

    Cost / License

    Application types

    Platforms

    • Windows
    Main UI
     
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    1
  8. Little Snitch icon

    Little Snitch

     137 likes

    Firewall application for monitoring and controlling outbound network connections, notifying users of attempted access, supporting rule-based blocking, real-time alerts on suspicious activity, and preventing unauthorized data transmission on macOS systems.

    43 Little Snitch alternatives

    Cost / License

    • Paid
    • Proprietary

    Application types

    Platforms

    • Mac
    • Linux
    Little Snitch screenshot 1
     
  10. OpenSnitch icon

    OpenSnitch

     43 likes

    OpenSnitch is a GNU/Linux application firewall.

    37 OpenSnitch alternatives

    Cost / License

    Application types

    Platforms

    • Linux
    OpenSnitch screenshot 1
     
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    1
  11. InviZible Pro icon

    InviZible Pro

     25 likes

    InviZible Pro uses DNSCrypt Protocol, Tor and i2pd (I2P Daemon) (PurpleI2P) to achieve maximum security, privacy and comfortable use of the Internet.

    32 InviZible Pro alternatives

    Cost / License

    Application types

    Platforms

    • Android
    • I2P
    • Tor
    InviZible Pro screenshot 1
     
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    1
  12. NetLimiter icon

    NetLimiter

     93 likes

    Comprehensive Windows software for internet traffic control, enabling users to set bandwidth limits for applications or connections. Offers real-time monitoring, long-term stats per app, and detailed internet usage reports. Ideal for managing data efficiently and enhancing network performance.

    28 NetLimiter alternatives

    Cost / License

    • Paid
    • Proprietary

    Application types

    Platforms

    • Windows
    NetLimiter screenshot 1
     
  14. Comodo Free Firewall icon

    Comodo Free Firewall

     152 likes

    Comodo Firewall is a personal firewall, a genre of security software that secures PCs by policing Internet traffic on an app by app basis. The most prominent feature of a personal firewall is generating popup notifications when an unknown program attempts to access the Internet...

    36 Comodo Free Firewall alternatives

    Cost / License

    • Free
    • Proprietary

    Application types

    Alerts

    • Bundleware

    Platforms

    • Windows
    A security popup is one of the most commonly seen user interface components of this app and its main purpose.
     
  15. Minimal Firewall icon

    Minimal Firewall

     12 likes

    Minimal Firewall is a portable Windows firewall frontend that alerts users to internet connections without requiring custom kernel modifications or disabling core isolation, striking a balance between TinyWall's security and SimpleWall's functionality.

    35 Minimal Firewall alternatives

    Cost / License

    Application types

    Platforms

    • Windows
    Minimal Firewall screenshot 1
     
12 of 29 Portmaster alternatives