# Portmaster (open-source security and privacy app)

> Portmaster is a free, open-source security and privacy app for Windows and Linux. Love Freedom - Block Mass Surveillance. It has 13,887 GitHub stars and is released under the GPL-3.0 license, and people use it instead of GlassWire and Little Snitch.

Portmaster is a free and open-source application firewall that does the heavy lifting for you. Restore privacy and take back control over all your computer's network activity.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/safing/portmaster |
| Platforms | Linux, Windows |
| Interface | desktop GUI |
| GitHub stars | 13,887 |
| License | GPL-3.0 (open source) |
| Replaces | GlassWire, Little Snitch |
| Language | Go |
| Website | https://safing.io |
| Official | yes (published by the project behind the app) |
| Category | Password managers, encryption & privacy |
| Latest release | v2.2.3 (Aug 14, 2026) |
| Last commit | Oct 6, 2026 |

## Install

Download a build for your system from the project's releases (https://github.com/safing/portmaster/releases) or website, or build it from source by following the README.

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Canonical page: https://appsgit.com/desktop-apps/portmaster
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