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HWMonitor vs Sidebar Diagnostics: catalog facts
HWMonitor	Sidebar Diagnostics
Freemium Free, ad-supported on the website, with a paid PRO version.	Free Free and open source under the GPL-3.0 licence.
Windows	Windows
Reads a wide range of motherboard, CPU, GPU and drive sensors Portable zip version available	Always-visible sidebar instead of a separate window Covers CPU, RAM, GPU, network and drives
Windows only Graphs and remote monitoring are in the paid PRO version	Windows only Last code change was in early 2024
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
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 October 2, 2026

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