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Plasma System Monitor vs htop: catalog facts
Plasma System Monitor	htop
Free Free and open source, developed by the KDE community.	Free Free and open source under the GPL.
Linux	macOS, Linux, Command line
Shows sensors, processes and resource usage in one window Customizable monitoring pages	Kill, renice and filter processes interactively without typing PIDs Per-core meters and tree view make load easy to read at a glance
Linux only Most at home on a KDE Plasma desktop	Terminal only, with no historical graphing Some counters differ per platform outside Linux
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-only OR GPL-3.0-only	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.