Compare software

Little SnitchPortmaster
Paid

A one-time purchase is required after the demo period.

 Freemium

Free and open source under the GPL 3.0. Network history search, per-app bandwidth and the…

macOS Windows, Linux
  • Per-application outbound rules with a clear prompt at the moment of connection
  • Network monitor shows exactly which process is talking to where
  • Blocks known trackers and malware with no configuration
  • Live list of every connection, attributed to the program that made it
  • One-time paid licence, macOS only
  • The initial flood of prompts takes patience to train
  • Windows and Linux only
  • Network history search and bandwidth figures are paid features
Downloadable app Downloadable app
Closed source Open source
License not stated License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 22, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.