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Avira Free Security vs Avast Free Antivirus: catalog facts
Avira Free Security	Avast Free Antivirus
Freemium Free tier with paid Internet Security and Prime plans.	Freemium The antivirus is free; Avast sells a VPN and other paid products.
Windows, macOS, Android, iOS	Windows, macOS, Android
Real-time antivirus at no cost Extra tools like software updater and browser safety	Free antivirus from a large vendor Available for Windows, macOS and Android
Closed source Upsells paid plans and premium tools	Closed source Promotes paid products from within the free offer
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	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.