Open Source Little Snitch Alternatives

    The best open source alternative to Little Snitch is LuLu by Objective-See, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Little Snitch and nine of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Little Snitch are OpenSnitch (Free, Open Source), AFWall+ (Free, Open Source), Portmaster (Free, Open Source) and NetGuard (Freemium, Open Source).

    This page was last updated May 17, 2021

    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 4 months ago

      yehia2amer I Wanted a tool to replace Little Snitch, and this one is GREAT. It is Free, Open Source, and very lite weight.
      Positive comment about 2 years ago

      rizhenkov It's very simple and free!
      Positive comment about 3 years ago

    2. OpenSnitch is a GNU/Linux port of the Little Snitch application firewall.
      Most users think OpenSnitch is a great alternative to Little Snitch.

    3. Firewall (iptables frontend), based on DroidWall which is no longer being developed. A paid "donate"-version with more features it advertised within the app.
      No screenshots yet
    4. All-Around System Privacy Since the Portmaster sits on your kernel, you can finally protect your whole computer, not just your browser. Do you want to block Ads and Analytics for your whole operating system? The Portmaster has you covered.
      • FreemiumOpen Source
      • Android
      • Android Tablet
      NetGuard provides simple and advanced ways to block access to the internet - no root required. Applications and addresses can individually be allowed or denied access to your Wi-Fi and/or mobile connection.
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    5. It lists activities, broadcast receivers, services, providers, permissions, signatures, shared libraries, etc.
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      • 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. You can allow network traffic for some applications and deny network traffic for others.
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    6. Stronghold is the easiest way to securely configure your Mac. Designed for macOS Sierra and High Sierra. Not yet tested on macOS Mojave, but I'm working on updating it!
      • FreeOpen Source
      • Linux
      • Raspberry Pi
      The upribox Software turns your RaspberryPi into a privacy-enhancing Wireless router with adblocking, Tor, and a VPN server.
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    Showing 9 of 9 alternatives