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Both companies are known for their top-of-the-line malware detection performance and robust suites of security features. Bitdefender has a slight advantage in our test due to its free, superior version, better malware detection scores, and more bonus features. However, Kaspersky still offers an exceptional product and its slender lead in detection rates might prove to be sufficient for some users.

Both suites provide the most effective protection against ransomware as well as other common threats. However, their methods to detecting and eliminating malware from your system are different. Bitdefender employs heuristic scanning to identify patterns that may be related to malicious code and may produce false-positives, whereas Kaspersky relies heavily on the signature database for identifying threats.

Both security apps have distinct user interfaces. Bitdefender's home screen greets you with the message "You are safe," and its layout provides a range of tools commonly used at your fingertips. Kaspersky's screens are more complicated and confusing however it does have an individual status widget that can run continuously in the lower right corner of your screen.

Both suites offer excellent customer support, which includes forums for community members and a phone helpline. Kaspersky provides a 24/7 phone assistance service, while Bitdefender has a comprehensive FAQ on its website, as well as tutorials that can help you solve common problems. Both offer multi-device plans, which include virtual private networks and password manager. They also provide excellent parental controls.