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smartmontools vs SeaTools: catalog facts
smartmontools	SeaTools
Free Free and open source under the GNU GPL version 2.	Free Free download from Seagate.
Windows, macOS, Linux, Command line	Windows
Often gives advance warning of disk degradation before data is lost smartd monitors on a schedule and notifies you, rather than waiting to be asked	Official diagnostic tool from a drive manufacturer Quick health check for hard drives and SSDs
Command-line only; interpreting the attribute values takes some learning Attribute meanings vary by manufacturer and are not always documented	Aimed mainly at Seagate drives Offers diagnostics rather than repair or recovery
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License: Proprietary
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 September 21, 2026	Official website Full listing and sources Checked September 24, 2026

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