Bitdefender Total Security Pricing & Plans

Yes — Bitdefender Free and all paid tiers share the same underlying antivirus engine. Independent labs like AV-TEST and AV-Comparatives consistently award Bitdefender's engine detection rates of 99.9%–100% against real-world and zero-day threats, and this core protection level applies equally to the free version. The difference between free and paid is not detection quality but the breadth of additional features: paid plans add a full firewall, unlimited VPN, advanced ransomware protection, parental controls, a file shredder, and multi-device licensing.