Compare software

nmon vs htop: catalog facts
nmon	htop
Free Free to download.	Free Free and open source under the GPL.
Linux, Command line	macOS, Linux, Command line
Many metrics on one screen with low CPU impact Records to CSV for later analysis	Kill, renice and filter processes interactively without typing PIDs Per-core meters and tree view make load easy to read at a glance
Terminal only, with keyboard toggles to learn Mainly aimed at Linux and AIX servers	Terminal only, with no historical graphing Some counters differ per platform outside Linux
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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