Compare software

Portmaster vs Picosnitch: catalog facts
Portmaster	Picosnitch
Freemium Free and open source under the GPL 3.0. Network history search, per-app bandwidth and the…	Free Free, with source code published on GitHub.
Windows, Linux	Linux
Blocks known trackers and malware with no configuration Live list of every connection, attributed to the program that made it	Alerts on new connecting or modified programs Per-executable bandwidth history with several breakdowns
Windows and Linux only Network history search and bandwidth figures are paid features	Linux only Monitors and logs traffic but does not block it
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 24, 2026

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