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Portmaster vs GlassWire: catalog facts
Portmaster	GlassWire
Freemium Free and open source under the GPL 3.0. Network history search, per-app bandwidth and the…	Freemium A free version is available. Longer history and extra features require a paid licence.
Windows, Linux	Windows, Android
Blocks known trackers and malware with no configuration Live list of every connection, attributed to the program that made it	Visual history makes it obvious which application started talking and when Alerts on first connections and on changes to system network settings
Windows and Linux only Network history search and bandwidth figures are paid features	Longer history retention and several features need a paid licence Windows and Android only, closed source
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

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