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Zen vs hBlock: catalog facts
Zen	hBlock
Free Free and open source.	Free Free to download and use.
Windows, macOS, Linux	Linux, Command line
Covers all browsers and apps with one install Blocks trackers as well as ads	Single portable POSIX shell script Combines several blocklist sources
Network-level filtering may need troubleshooting with some apps Not available for mobile devices	Only protects the machine whose hosts file it writes No per-app or per-request control
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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