Compare software

Zenith vs nmon: catalog facts
Zenith	nmon
Free Free and open source.	Free Free to download.
Linux, Command line	Linux, Command line
Zoomable usage charts inside the terminal Per-process disk usage in a filterable process table	Many metrics on one screen with low CPU impact Records to CSV for later analysis
Unix-like systems only, no Windows support Terminal interface only, no graphical app	Terminal only, with keyboard toggles to learn Mainly aimed at Linux and AIX servers
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	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 September 23, 2026

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