Bitdefender and Avira provide top-of-the-line malware security with real-time protection, as well as ransomware security. They're also both really easy to use, meaning that even novices to cybersecurity can be up and running in no time. Both of them offer additional features such as an VPN and an option to shred files and other privacy security.
Avira and Bitdefender both have excellent overall scores in independent labs for testing. However, in this particular round I'd prefer to give the edge to Bitdefender because of its superior performance in the AV Comparatives' Performance Test, which measures how much impact security software has on a computer's speed. The low score indicates that it runs in the background and doesn't significantly slowing down your computer -- unlike some competitors.
AV-Comparatives also tests for how much of an impact each software has on system performance when performing routine computer tasks like visiting websites, downloading files, and copying files. Bitdefender was the lone competitor to pass this test with a clean score. Avira was a close second.
Both companies offer a good level of customer service. Avira offers a comprehensive knowledge base and YouTube channel, whereas Bitdefender provides a full support hub that includes a phone number and live chat, email support and videos that show how to use the service. The support hub is arranged by product so that you can get the help you need.