The Best Antivirus Protection Software of 2021

This article is long enough, so let’s cut to the chase: which antivirus software is the best? Over the past 12 months, our team has tested 40 of the top antivirus software to try and answer that very question. And our answer? Well, it ultimately depends on the user, but there were eight antivirus software companies that particularly stood out. This review focuses on those softwares and why they are the best of the best.

Statistics

While these two— Norton and Kaspersky— garnered the highest ratings from us based on our tests, Bitdefender, Trend Micro, Avast, McAfee, ESET, and Vipre also performed remarkably well. We like to give our readers options, so keep going if you’d like to see which of these eight antivirus software is best for you.

Methodology

So that’s about it for our list of the best antivirus software, but before we end this review, we’d like to give you an idea of our methodology.

We wanted to make our assessment as objective as possible, so we tested each software for at least six months. We took careful notes of their strengths and weaknesses, observed how they affected our devices, and monitored their behavior with regards to updates. We also tried to test each software across multiple operating systems to get a feel of their performance on Windows, Mac, iOS, and Android. If you want more specific information, check out the best antivirus for Mac, the best antivirus for Android, the best antivirus for Linux, and the best antivirus for PCs. And last but not least, we compared how each software fared in the following criteria.

Virus Detection

First, we stripped down each antivirus to their most basic feature: virus detection. We performed a virus detection test wherein we downloaded five files, each containing a different type of virus or malware. They ranged from adware to spyware and even Trojan malware. We then performed a full scan using each software and noted which antivirus detected which files. And the result? Well, the majority of the antivirus programs we tested detected at least three of the five files, but there were a couple of software that detected all five files and a few that detected 80 percent of the files.

Now, we don’t recommend doing the virus detection test by yourself unless you know what you’re doing. You could lose important files or even subject yourself to the dangers of having viruses on your computer. However, if you really want to see how an antivirus reacts to malware, you could use a harmless anti-malware testfile such as the one developed by the European Institute for Computer Antivirus Research (EICAR).3

Scans

While we’re on the subject of virus and malware detection, the next thing we tested was whether each antivirus tool scanned on access or on demand. Simply put, those that scanned on access searched for threats whenever the software was running, even in the background. In contrast, those with on-demand scanning scanned only whenever we instructed or scheduled them to scan. We prefer on-access scanning as it stops viruses and malware in real-time whether we remember to scan our computers or not. However, having on-demand scanning is also ideal. We still want to be able to scan our computers whenever we’re feeling anxious, you know?

Behavior-Based Detection

There’s another scanning-related feature that we deemed necessary: behavior-based detection. To understand what it is, we must first explain how traditional antivirus programs detect threats. Basically, when scanning a computer, the antivirus compares programs and files to a database of all known malware. The software may consider a file suspicious if it shares the same characteristics or code base as an existing threat. Now, that’s effective for detecting previously-known threats, but it has little to no effect on malware that is not yet on the database.

That’s where behavior-based detection kicked in. Instead of checking the code of each program and file, behavior-based detection monitored suspicious behaviors of files. For instance, one of the software we tested used this kind of detection to isolate a Trojan virus disguised as a Word file, likely because the .doc file in question tried to access our system files (nice try!). Having behavior-based detection really came in handy, especially since hundreds of thousands of new malware are being registered on a daily basis, according to the AV-TEST institute.4

Cost

We know that the cost is a major deciding factor when it comes to choosing an antivirus software. However, the prices of such tools fluctuate depending on the features, number of devices, and length of subscriptions. To keep them on equal grounds, we compared each software’s pricing for a one-year license that supports one to five devices. On average, the antivirus software we tested cost $30 to $40 for the first year. Of course, this isn’t the case for business antivirus, only personal.

We also checked if they have a free trial or better still, a free version. What’s the difference? Typically, a free trial includes all the features of the paid antivirus, but it only works for a limited time. Most of the free trials we found lasted up to 30 days only. In contrast, a free version is usually a licensed software that you could use for free indefinitely. The catch is that the features are limited, most likely. You likely won’t see any bells and whistles in your software— like password managers or VPNs, for instance— but you’ll have antivirus protection nonetheless. If you’re hesitant about getting a paid antivirus, we recommend using a free version for the time being.

Privacy Policy

Now onto the more tedious stuff. Because antiviruses needed access to our computers and files to do their jobs, it’s understandable that many of them collected our data. But the questions are: how much data did they collect and how did they use it? To answer that, we delved into each antivirus company’s privacy policy, and boy were we surprised. Many of the companies we looked into collect a ton of data from their users. The data they gathered included:

• Personal information such as contact details
• Payment information
• Browsing data such as the URLs we visited (although some of them anonymized the data before storing them)
• Device information like our MAC and IP addresses, IMEI numbers, and OS version
• Technical and crash reports
• Location information
• Network data
• Usage statistics

And many more! But wait, what’s even more concerning was how they used the data they gathered. Many of the antivirus companies we looked into explicitly said in their privacy policy that they share user data with third parties, usually with their partners for targeted advertisement purposes. Needless to say, we weren’t thrilled. However, that’s the industry norm. So instead of counting out those that do these practices, we gave higher scores to those that didn’t or those that let us manage what data they collected.

Recap

Getting an antivirus software is the first step towards staying safe in the digital world. With the right software, you’re sure to find yourself worrying less about the cyber threats looming around online. But it’s not the only digital security measure you can take. Once you get an antivirus software set up, be sure to check our review of the best VPNs and best identity theft protection products.