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

     271 likes
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    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.

    121 AdGuard alternatives

    Cost / License

    • Freemium (Pay once or Subscription)
    • Open Source

    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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    1
    Comments about AdGuard as an Alternative to Portmaster
    TBayAreaPat
    2

    AdGuard is great, but it's not a firewall/port system.

    Portmaster Icon
    AdGuard icon

    • AdGuard is the most popular Android Tablet alternative to Portmaster.

    • AdGuard is Freemium and Open SourcePortmaster is also Freemium and Open Source
  4. RethinkDNS icon

    RethinkDNS

     57 likes
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    An OpenSnitch-inspired firewall and network monitor + a pi-hole-inspired DNS over HTTPS client with blocklists.

    45 RethinkDNS alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Online
    • Android
    • Android Tablet
    • F-Droid
    RethinkDNS screenshot 1
    RethinkDNS screenshot 2
    RethinkDNS screenshot 3
     
  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

     151 likes
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    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.

    66 GlassWire alternatives

    Cost / License

    • Freemium (Subscription)
    • Proprietary

    Application types

    Platforms

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

    Fort Firewall

     34 likes
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    Simple firewall for MS Windows.

    37 Fort Firewall alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Windows
    Main UI
     
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    1
    Comments about Fort Firewall as an Alternative to Portmaster
    RemovedUser
    Positive
    1

    It's more lightweight than Portmaster. It notifies me every time a new app is in use even background programs. Plus it shows the file path for each app which makes it easier to make sure it isn't malware posing as legitmate software.

    Review by a new / low-activity user.
    Portmaster Icon
    Fort Firewall icon
    • Fort Firewall is Free and Open SourcePortmaster is Freemium and Open Source
  8. Little Snitch icon

    Little Snitch

     135 likes
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    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.

    40 Little Snitch alternatives

    Cost / License

    • Pay once
    • Proprietary

    Application types

    Platforms

    • Mac
    Little Snitch screenshot 1
     

    • Little Snitch is the most popular commercial alternative to Portmaster.

    • Little Snitch is Paid and ProprietaryPortmaster is Freemium and Open Source
  10. OpenSnitch icon

    OpenSnitch

     42 likes
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    OpenSnitch is a GNU/Linux application firewall.

    37 OpenSnitch alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Linux
    OpenSnitch screenshot 1
     
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    1
    Comments about OpenSnitch as an Alternative to Portmaster
    Alx84
    Positive
    -1

    OpenSnitch is much more superior to any other software, especially astro-turfed Portmaster. Portmaster doesn't detect even a fraction of what is actually happening on your system, whereas OpenSnitch catches it all. It's an application firewall everyone should have! You'll be amazed how many stuff pretending-to-be-FOSS software is phoning home on you.

    Portmaster Icon
    OpenSnitch icon
    • OpenSnitch is Free and Open SourcePortmaster is Freemium and Open Source
  11. NetLimiter icon

    NetLimiter

     92 likes
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    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

    • Pay once
    • Proprietary

    Application types

    Platforms

    • Windows
    NetLimiter screenshot 1
     
  13. InviZible Pro icon

    InviZible Pro

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

    29 InviZible Pro alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Android
    • I2P
    • Tor
    InviZible Pro screenshot 1
     
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    1
    Comments about InviZible Pro as an Alternative to Portmaster
    RemovedUser
    Positive
    0

    Even though the firewall for this is less sophisticated, I still think it's a good alternative because of the dnscrypt protocol and anonymizing proxies. They're both "swiss-army knives" when it comes to privacy, but it's implemented in slightly different ways.

    Review by a new / low-activity user.
    Portmaster Icon
    InviZible Pro icon
    • InviZible Pro is Free and Open SourcePortmaster is Freemium and Open Source
  14. Comodo Free Firewall icon

    Comodo Free Firewall

     152 likes
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    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

     9 likes
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    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

    • Free
    • Open Source

    Application types

    Platforms

    • Windows
    Minimal Firewall screenshot 1
     
12 of 29 Portmaster alternatives