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Picosnitch vs Netiquette: catalog facts
Picosnitch	Netiquette
Free Free, with source code published on GitHub.	Free Free download from Objective-See.
Linux	macOS, Command line
Alerts on new connecting or modified programs Per-executable bandwidth history with several breakdowns	Connections grouped by the process that made them Shows ports, protocol, state and bytes transferred
Linux only Monitors and logs traffic but does not block it	macOS only, 10.15 or later Monitors connections but does not block them
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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