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Sidebar Diagnostics vs Open Hardware Monitor: catalog facts
Sidebar Diagnostics	Open Hardware Monitor
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the Mozilla Public License.
Windows	Windows, Linux
Always-visible sidebar instead of a separate window Covers CPU, RAM, GPU, network and drives	Open source, so the sensor handling can be inspected and reused Readings can sit in the tray or a desktop gadget
Windows only Last code change was in early 2024	Upstream development stopped years ago; Libre Hardware Monitor is the maintained fork Newer chipsets and sensors are frequently unrecognised
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MPL-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 October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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