OSS Discovery

AT
Austria
PRODUCTIVITY
SELF-HOSTABLE
ACTIVELY MAINTAINED
FREEMIUM
Portmaster

PORTMASTER

"Portmaster: Open-source app firewall for privacy. Take control of your network with ease, blocking trackers and malware system-wide by default, and customize every detail for ultimate peace of mind and security."

GITHUB STARS
13k
+12% this month
FORKS
473
Active community
LAST PUSH
Apr 24, 2026
High momentum
WATCHERS
86
Tracking updates
LICENSE
GPL-3.0
Commercial use
"Portmaster: Open-source app firewall for privacy. Take control of your network with ease, blocking trackers and malware system-wide by default, and customize every detail for ultimate peace of mind and security."

High Performance

Built for speed and minimal overhead.

Self-hostable

Docker, Kubernetes, or bare metal

Developer Native

Programmable via any language workflow

SUPPORTED LANGUAGES

Go
Go
C
C
TypeScript
TypeScript
Rust
Rust
HTML
HTML
SCSS
SCSS
Pascal
Pascal
Shell
Shell
PowerShell
PowerShell
Earthly
Earthly
Go Template
Go Template
CSS
CSS
JavaScript
JavaScript
C++
C++
NSIS
NSIS
VBScript
VBScript
Dockerfile
Dockerfile
Less
Less

VISUAL INTERFACE

Screenshot 1
Screenshot 2
Screenshot 3

The Quick Glance

Status
Active
Category
Productivity
Pricing
Freemium
Self-Hosted
Yes
Available on
Windows
Latest Release
v2.1.7
Dec 17, 2025

Relative Standing — across 1,284 tools

STARS13k
Top 30% globally
FORKS473
Top 50% in Open Source
ACTIVITYModerate
Top 59% Activity
WATCHERS86
Top 38% Community