OpenSnitch

Open-source alternative to Little Snitch and GlassWire. An interactive application firewall that shows and controls outbound connections on Linux.

The missing outbound-connection control for Linux users who want to know what apps are doing.

At a glance

ReplacesLittle Snitch, GlassWire
Open-source licenseGPL-3.0
PrivacyMakes hidden app connections visible and individually controllable.
Lightweight signalFocused host firewall rather than a cloud security suite.
Community healthActive Linux security project
PlatformsLinux
Privacy advantage

Makes hidden app connections visible and individually controllable.

Less bloat

Focused host firewall rather than a cloud security suite.

Trust signal

Active Linux security project. Verify current releases and open issues in the source repository before critical deployment.

Should you switch to OpenSnitch?

The missing outbound-connection control for Linux users who want to know what apps are doing. A successful migration starts with a small real project, not a feature checklist. Test the files, integrations, shortcuts, and collaboration steps you use every week before removing the existing tool.

Open source gives you inspectable code and a path away from vendor lock-in, but it does not eliminate tradeoffs. Support may be community-led, some commercial file formats may be imperfect, and self-hosted options require security updates and backups. Use the official website and source repository above to confirm current compatibility.

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