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ufw vs OpenSnitch: catalog facts
ufw	OpenSnitch
Free Free and open source under the GNU GPL v3.	Free Free and open source under the GPL.
Linux, Command line	Linux
Short commands for allowing and denying ports Application profiles for common services	Prompts on every new outbound connection, so unexpected traffic becomes visible Blocks ad, tracker and malware domains system-wide
Command-line only Less expressive than writing netfilter rules directly	Linux only The first days are a stream of prompts until your rules settle
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 23, 2026	Official website Full listing and sources Checked September 21, 2026

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