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Hard Disk Sentinel vs PassMark DiskCheckup: catalog facts
Hard Disk Sentinel	PassMark DiskCheckup
Freemium A limited free version exists. The Professional edition is a paid licence.	Free Free to download and use.
Windows, Linux	Windows
Health and estimated lifetime per drive rather than raw S.M.A.R.T. values Sees drives behind many USB enclosures and RAID controllers	Shows SMART values alongside their thresholds Predicts when an attribute may cross its threshold
The free version is limited; most features need the paid Professional edition	Windows only Closed source
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License: Proprietary
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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