Portmaster
Portmaster is a free program for Windows and Linux computers that watches which apps connect to the internet and can block connections the user does not want. It is aimed at everyday people who want more control over their computer's network activity and privacy.
How hard it is to start using it. Easy: install it like a normal app, or use it in your browser. Advanced: you run it on your own server, use the command line, or it is a tool for developers.
Features
Blocks app connections
SourceYes
Windows, Mac and Linux appWindows and Linux only; no Mac app mentioned
SourcePartly
Phone appNo phone app mentioned
SourceNo
Shows where data goesShows countries and domains in rules, not clearly per connection
SourcePartly
Data use per appPer-app bandwidth is paid; live monitoring is shown
SourcePartly
Nothing locked behind a paid versionNetwork history, bandwidth and SPN are paid
SourcePartly
Screenshots
Listed in
How to help
AI contributionsNot stated
The project has not said how it feels about AI-written contributions. Maintainers can set this by claiming the listing.