Portmaster is Alpha Software - expect hiccups here and there

Control Your Computer, Get Peace of Mind

Portmaster is a free and open-source application that puts you back in charge over all your computer's network connections.

Explore All Portmaster Features

With Portmaster's great defaults your privacy improves without any effort. And if you want to configure and control everything down to the last detail - Portmaster has you covered too!

Alpha Software: Portmaster is in active development

Monitor All Network Activity

Discover everything that is happening on your computer. Expose every connection your applications make and detect evil ones. Finally get the power to act accordingly.

Alpha Software: Portmaster is in active development

Auto-Block Trackers & Malware

Block ads, trackers and malware hosts system-wide. Portmaster does this by default and uses trusted filter lists, which are also used by Ad-Blockers, etc. Easily change the defaults to fit your needs.

Alpha Software: Portmaster is in active development

Secure Your DNS by Default

Even with invasive connections gone, you do not want to share your dns requests out in the open. With Portmaster, all your DNS queries are automatically secured and re-routed to a DNS-over-TLS provider of your choice.

Alpha Software: Portmaster is in active development

Explore the Docs and Source Code

In the age of Mass Surveillance, what good is a service when you cannot see what it is really doing? We believe in open source. We also document everything as good as we can.

Checkout the docs Inspect source code
Alpha Software: Portmaster is in active development

Create Your Own Rules

Portmaster has great defaults - but one shoe does not fit all. Customize and configure Portmaster's powerful settings to fit your needs and threat model.

Alpha Software: Portmaster is in active development

Set Global & per‑App Settings

Easily cut off applications from the Internet. Or block all p2p connections globally but allow them for certain apps. Or never connect to specific countries. Portmaster has you covered.

Download

Portmaster is Alpha Software, treat as such; expect bugs here and there. Early Adopters welcome.
Windows 10 + 11 Ubuntu Fedora Macos (Not supported)

View guide and status for Windows 7, 8 or other Linux 2.4+ distributions. View installer checksums.

FAQ

You have a question? We answered some already, but you can always contact us at hello@safing.io

In short, our business model is Freemium. First provide local privacy for free, forever. Then let happy users support us by paying for a powerful VPN alternative. Finally reinvest earnings into making all our products better.


Learn more about the Business Model
Yes, we highly recommend to continue using adblockers, such as uBlock Origin, uMatrix, or similar. They give you more fine grained control over domains. iE you can allow certain domains to allow css files & images while blocking cookies & javascripts. The Portmaster cannot make this distinction.
Currently we support Windows and Linux. Mac and Mobile are planned, but are further down the road.
As a security measure, Portmaster blocks all incoming connections by default. You can create exceptions for apps and services that need it.


Learn how to configure exceptions for Incoming Connections
As a security measure, Portmaster blocks all incoming connections by default. You can create exceptions for apps and services that need it.


Learn how to configure exceptions for Incoming Connections
You can find our code on Github. The Portmaster, the Portmaster UI, the SPN, the docs and this website have their respective repositories. Jess, the heart of the SPN, which got audited by Cure53, can also be found online.