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nmon vs Performance Co-Pilot: catalog facts
nmon	Performance Co-Pilot
Free Free to download.	Free Free and open source.
Linux, Command line	macOS, Linux, Self-hosted, Command line
Many metrics on one screen with low CPU impact Records to CSV for later analysis	Collects metrics from multiple hosts and operating systems Live and historical analysis from archives
Terminal only, with keyboard toggles to learn Mainly aimed at Linux and AIX servers	Steeper learning curve than a single-machine monitor Aimed at administrators rather than casual users
Downloadable app	Downloadable app, Self-hosted
Closed source	Open source
License not stated	License: GPL-2.0, LGPL-2.1
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 23, 2026

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