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Portmaster vs Gufw: catalog facts
Portmaster	Gufw
Freemium Free and open source under the GPL 3.0. Network history search, per-app bandwidth and the…	Free Free and open source under the GPL-3.0 licence.
Windows, Linux	Linux
Blocks known trackers and malware with no configuration Live list of every connection, attributed to the program that made it	Manages ufw rules without the command line Uses PolicyKit for privileged actions
Windows and Linux only Network history search and bandwidth figures are paid features	Linux only and depends on ufw being installed Small project with infrequent visible activity
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
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 October 1, 2026

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