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bottom vs nmon: catalog facts
bottom	nmon
Free Free and open source under the MIT licence.	Free Free to download.
Windows, macOS, Linux, Command line	Linux, Command line
Plots CPU, memory, network, temperature and disk I/O over time, with a zoomable interval Process widget with sorting, searching, tree mode and kill signals	Many metrics on one screen with low CPU impact Records to CSV for later analysis
Some sensors and metrics are only available on some platforms Charts take terminal space; a small window gets cramped	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 21, 2026	Official website Full listing and sources Checked September 23, 2026

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