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Open Source Little Snitch Alternatives

The best open source alternative to Little Snitch is LuLu by Objective-See. If that doesn't suit you, our users have ranked more than 25 alternatives to Little Snitch and 12 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Little Snitch are Portmaster, OpenSnitch, NetGuard and App Manager.

Little Snitch alternatives are mainly Firewalls but may also be Network Monitors or Ad Blockers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Little Snitch.
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  • Mac

A firewall protects your computer against unwanted guests from the Internet. But who protects your private data from being...

Learn more about Little Snitch

  1. LuLu is the free, shared-source firewall for macOS. Its goal is simple; block any unknown outgoing connections, until approved by the user.

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    LuLu by Objective-See vs Little Snitch opinions
    Almost everyone thinks LuLu by Objective-See is a great alternative to Little Snitch.
    gianclgar

    Free (Libre) Software is and will be always best for the humanity :)

    Positive comment ago
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    yehia2amer

    I Wanted a tool to replace Little Snitch, and this one is GREAT. It is Free, Open Source, and very lite weight.

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    rizhenkov

    It's very simple and free!

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  2. Portmaster icon

    Portmaster

    • FreeOpen Source
    • Windows
    • Linux

    Portmaster is a free and open-source application firewall that puts you back in charge over all your computer's network connections.

    ⚫︎ Privacy focusedPortmaster is considered a privacy friendly alternative.
    ⚫︎ Dark ModePortmaster supports dark mode for comfortable usage in low light conditions.
    ⚫︎ Block TrackersPortmaster has a feature to block trackers from tracking you.
    ⚫︎ No TrackingPortmaster will not track or use your personal data.
    ⚫︎ No LogsPortmaster doesn't keep any logs of your activities.
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    Network Activity Overview


  3. OpenSnitch icon

    OpenSnitch

    • FreeOpen Source
    • Linux

    OpenSnitch is a GNU/Linux port of the Little Snitch application firewall.

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    Screenshot
    OpenSnitch vs Little Snitch opinions
    Most users think OpenSnitch is a great alternative to Little Snitch.
  4. NetGuard icon

    NetGuard

    • FreemiumOpen Source
    • Android
    • Android Tablet
    • F-Droid

    NetGuard provides simple and advanced ways to block access to the internet - no root required.

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    Screenshot
  5. App Manager icon

    App Manager

    • FreeOpen Source
    • Android
    • Android Tablet
    • F-Droid

    It lists activities, broadcast receivers, services, providers, permissions, signatures, shared libraries, etc. of any app

    ⚫︎ Privacy focusedApp Manager is considered a privacy friendly alternative.
    ⚫︎ Block TrackersApp Manager has a feature to block trackers from tracking you.
    ⚫︎ No registration requiredYou can use most of the features in App Manager without registration.
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    Screenshot


  6. AFWall+ icon

    AFWall+

    • FreeOpen Source
    • Android

    Firewall (iptables frontend), based on DroidWall which is no longer being developed. A paid "donate"-version with more features it advertised within the app.

    ⚫︎ Root requiredRequires root to use AFWall+, mainly relevant for Android apps.
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    Screenshot
  7. Lockdown Privacy icon

    Lockdown Privacy

    • FreeOpen Source
    • Mac
    • iPhone
    • iPad

    Lockdown Privacy is an Open Source and free firewall for your iOS device. We built the product to help protect users from app developers and analytics companies that are monetizing user data without consent or transparency.

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  8. ufw

    • FreeOpen Source
    • Linux

    Ufw stands for Uncomplicated Firewall, and is program for managing a netfilter firewall. It provides a command line interface and aims to be uncomplicated and easy to use.

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    Screenshot
  9. Douane icon

    Douane

    • FreeOpen Source
    • Linux

    Douane is a personal firewall that protects a user's privacy by allowing a user to control which applications can connect to the internet from their GNU/Linux computer.

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    Screenshot
  10. upribox icon

    upribox

    • FreeOpen Source
    • Linux
    • Raspberry Pi

    Usable Privacy Box (upribox) - secure your home network. The upribox protects your privacy and security by blocking ads and trackers.

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    Screenshot
Showing 10 of 12 alternatives