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SIW vs Belarc Advisor: catalog facts
SIW	Belarc Advisor
Paid Commercial software; check the developer site for current editions and prices.	Free Free for personal use only; commercial and government use is prohibited.
Windows	Windows
Covers hardware, software and network in one place Shows product keys and software licences	Detailed inventory of hardware and installed software Lists missing Microsoft hotfixes and anti-virus status
Windows only Closed source	Personal use only; not allowed in businesses or schools Windows only
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License: Proprietary
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 24, 2026

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