little-snitch ☆
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Description:
Host-based application firewall
Type: Cask  |  Latest Version: 6.3.3@0  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  @littlesnitch  |  formulae.brew.sh
Category: Security
Tags: firewall networking security privacy monitoring
Install: brew install --cask little-snitch
About:
Little Snitch is an inbound and outbound connection filter for macOS that monitors network activity and allows you to define granular rules for each application. It provides real-time visibility into network traffic, helping you identify and block unwanted communications. This proactive defense prevents applications from sending data without your explicit consent.
Key Features:
  • Network traffic monitoring with real-time alerts
  • Granular rule creation for inbound and outbound connections
  • Silent Mode for managing rules without interruptions
  • Network Monitor for visualizing traffic patterns and geography
Use Cases:
  • Preventing malware or spyware from exfiltrating data
  • Blocking ads and trackers at the network level
  • Auditing which applications are communicating with remote servers
Alternatives:
  • LuLu – Open-source alternative, though Little Snitch offers more mature features and a refined UI
  • TripMode – Focuses primarily on blocking background data usage to save bandwidth
Version History
Detected Version Rev Change Commit
Sep 15, 2025 7:12pm 6.3.1 0 VERSION_BUMP 4a6aa282
Sep 9, 2025 10:44am 6.3 0 VERSION_BUMP b0542184
Aug 1, 2024 9:44am 6.0.4 0 VERSION_BUMP ed88fa19
Jul 24, 2024 12:48pm 6.0.3 0 VERSION_BUMP 656a993a
Jun 26, 2024 9:39am 6.0.2 0 VERSION_BUMP 59eef71d
Jan 15, 2024 6:48am 5.7.3 0 VERSION_BUMP e6257414
Jan 9, 2024 12:59pm 5.7.2 0 VERSION_BUMP 16a5f7e6
Sep 19, 2023 11:16am 5.7.1 0 VERSION_BUMP e2a0772e
Apr 19, 2023 1:23pm 5.6 0 VERSION_BUMP 3831c04b
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