Compare software

ProduKey vs SIW: catalog facts
ProduKey	SIW
Free Freeware from NirSoft; free to use and redistribute unmodified at no charge.	Paid Commercial software; check the developer site for current editions and prices.
Windows, Command line	Windows
Recovers keys for Windows, Office, SQL Server and Exchange Reads keys from remote computers, other installations and external drives	Covers hardware, software and network in one place Shows product keys and software licences
Does not recover every licence type; keys not stored in the Registry may be unavailable Office support listed by the developer covers Office 2000 through 2010	Windows only Closed source
Downloadable app	Downloadable app
Closed source	Closed source
License: Freeware	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 24, 2026

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