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BitLocker vs WD Security: catalog facts
BitLocker	WD Security
Paid Included with Windows; the full feature set requires the Pro, Enterprise or Education…	Free Free download for owners of supported Western Digital drives.
Windows	Windows, macOS
Built into Windows with nothing extra to install Encrypts entire volumes	Uses the drive's own AES hardware encryption Simple set, change, remove and unlock functions
Windows only Full feature set limited to certain Windows editions	Only works with supported Western Digital drives A forgotten password means erasing the drive and losing its data
Operating system	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 23, 2026	Official website Full listing and sources Checked October 2, 2026

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