Little Snitch shows every network connection your Mac apps make in real time and lets you allow or deny them per-app and per-domain, giving you visibility and control no DNS blocker can match.
Each app below addresses a specific gap in Little Snitch's offering. We picked them based on real user review patterns and feature differentiation.
Lulu is a free, open-source macOS outbound firewall developed by Objective-See's Patrick Wardle. It blocks unauthorized outbound connections and provides alerts when new processes try to connect to the internet, similar to Little Snitch at no cost.
Explore Lulu data →Radio Silence is a minimalist macOS application firewall that blocks specific apps from accessing the internet. Simpler interface than Little Snitch with less granularity — you block by app, not by per-app domain rule.
Explore Radio Silence data →Murus is a graphical front-end for macOS's built-in PF packet filter. It supports inbound and outbound firewall rules, bandwidth throttling, and geo-blocking. More powerful than Little Snitch for blocking IP ranges but less granular for app-level control.
Explore Murus Firewall data →GlassWire provides real-time network monitoring, per-app bandwidth usage, and firewall control for Windows and Android. Similar in concept to Little Snitch but for Windows. Offers a free tier and paid plans for advanced features.
Explore GlassWire data →Pi-hole blocks ads and trackers at the DNS level for every device on your network. It does not provide per-app visibility or block first-party domains, but protects all devices including those that cannot run software like Little Snitch.
Explore Pi-hole data →NextDNS filters DNS queries in the cloud with per-device profiles and detailed logs. It protects all your devices by changing DNS settings and requires no local hardware. Complements rather than replaces Little Snitch's per-app visibility.
Explore NextDNS data →Little Snitch is developed by Objective Development, an Austrian company. It has been available for macOS since 2002 and is a staple tool for security researchers and privacy-conscious Mac users.
Little Snitch is a macOS application firewall that intercepts all outbound network connections your apps make and prompts you to allow or deny them. You can create rules per app, per domain, and per port, giving you detailed visibility into what your Mac is sending over the internet.
For security researchers, privacy-conscious users, and developers, Little Snitch is considered essential. It frequently reveals unexpected connections from first-party apps and helps identify apps phoning home with usage data. At $69 one-time, it is a strong value for its use case.
Little Snitch has minimal performance impact in allow mode for established rules. The initial rule-building period involves frequent prompts that can briefly interrupt workflow, but once rules are configured, it runs silently in the background.
App Vulture tracks network monitoring and firewall tools by update frequency, macOS compatibility, and user ratings. See our full comparison above for current data.
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