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Avira Free Security vs Bitdefender Total Security: catalog facts
Avira Free Security	Bitdefender Total Security
Freemium Free tier with paid Internet Security and Prime plans.	Paid Paid subscription, with renewal discounts for existing customers.
Windows, macOS, Android, iOS	Windows, macOS, Android, iOS
Real-time antivirus at no cost Extra tools like software updater and browser safety	Malware scanning, ransomware protection and firewall in one suite Covers multiple devices in a household
Closed source Upsells paid plans and premium tools	Paid subscription Closed source
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.