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

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