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HDDScan vs SpinRite: catalog facts
HDDScan	SpinRite
Free Freeware with no paid edition.	Paid Commercial software sold by GRC, with an upgrade path to version 6.1 for existing owners.
Windows	Windows
Surface tests in read, verify and erase modes Shows SMART attributes and drive temperature	Runs from boot media, independent of the installed system Combines drive maintenance with data recovery
Windows only RAID volumes and USB flash drives get surface tests only	Paid, with no free tier Closed source
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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