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Plasma System Monitor vs btop++: catalog facts
Plasma System Monitor	btop++
Free Free and open source, developed by the KDE community.	Free Free and open source, funded by donations.
Linux	macOS, Linux, Command line
Shows sensors, processes and resource usage in one window Customizable monitoring pages	Sortable, filterable process list with per-process detail, driven by mouse or keyboard Graphs for CPU, memory, disks and network in one screen
Linux only Most at home on a KDE Plasma desktop	No native Windows build; on Windows you need WSL It reports and does not manage: there is no alerting or historical logging
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-only OR GPL-3.0-only	License: Apache-2.0
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 20, 2026

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