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Kaspersky Premium vs Avast Free Antivirus: catalog facts
Kaspersky Premium	Avast Free Antivirus
Paid Paid subscription licence, with trial versions available.	Freemium The antivirus is free; Avast sells a VPN and other paid products.
Windows, macOS, Browser extension	Windows, macOS, Android
Top tier of an established consumer security range Trial available before purchase	Free antivirus from a large vendor Available for Windows, macOS and Android
Paid subscription that must be renewed Closed source	Closed source Promotes paid products from within the free offer
Downloadable app, Browser extension	Downloadable app
Closed source	Closed source
License: Proprietary	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it 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.