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ZoneAlarm vs Bitdefender Antivirus Free: catalog facts
ZoneAlarm	Bitdefender Antivirus Free
Freemium Free firewall and free antivirus, with paid security suites.	Free Free with no time limit; paid Bitdefender products add more protection.
Windows, macOS, Android, iOS	Windows
Free outbound firewall that controls program network access Free antivirus option	Free with no time limit or credit card Simple installation in a few steps
Most extra protections require a paid suite Closed source	Windows only Basic protection; extra features require a paid upgrade
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
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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