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SeaTools vs HDDScan: catalog facts
SeaTools	HDDScan
Free Free download from Seagate.	Free Freeware with no paid edition.
Windows	Windows
Official diagnostic tool from a drive manufacturer Quick health check for hard drives and SSDs	Surface tests in read, verify and erase modes Shows SMART attributes and drive temperature
Aimed mainly at Seagate drives Offers diagnostics rather than repair or recovery	Windows only RAID volumes and USB flash drives get surface tests only
Downloadable app	Downloadable app
Closed source	Closed source
License: Proprietary	License not stated
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 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.