little-snitch@4 ☆
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Description:
Host-based application firewall
Type: Cask  |  Latest Version: 4.6.1@0  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  @littlesnitch  |  formulae.brew.sh
Category: Security
Tags: firewall network-monitor security privacy macos
Install: brew install --cask little-snitch@4
About:
Little Snitch is an inbound and outbound connection filter for macOS that monitors network activity and allows users to define granular rules for each application. It provides real-time visibility into network traffic, helping to prevent unauthorized data exfiltration and protect privacy. Its network monitor and rule editor make it a powerful tool for understanding and controlling network behavior.
Key Features:
  • Real-time network traffic monitoring with a detailed traffic map
  • Flexible rule-based firewall for individual applications
  • Silent Mode for automatically handling background connections
  • Network Monitor for historical traffic analysis
Use Cases:
  • Preventing malware or spyware from communicating with command-and-control servers
  • Blocking ads and trackers at the network level
  • Auditing which applications are sending data to the internet
Alternatives:
  • LuLu – Open-source alternative that is free but may have a less refined user interface.
  • TripMode – Focuses primarily on blocking background traffic to save data, rather than deep packet inspection.
Version History
Detected Version Rev Change Commit
Sep 15, 2025 12:25pm 4.6.1 0 VERSION_BUMP 9951815e
Aug 5, 2025 2:20pm 4.5.2 0 VERSION_BUMP 81d208cf
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