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Picosnitch vs TapMap: catalog facts
Picosnitch	TapMap
Free Free, with source code published on GitHub.	Free The open-source application is available without a license fee.
Linux	macOS, Linux
Alerts on new connecting or modified programs Per-executable bandwidth history with several breakdowns	Makes background network chatter immediately visible Real-time map view rather than a log to read
Linux only Monitors and logs traffic but does not block it	Locations are approximate GeoIP lookups, not precise It only observes; it cannot block anything
Downloadable app	Downloadable app
Open source	Open source
License not stated	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 24, 2026	Official website Full listing and sources Checked September 22, 2026

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