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

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