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Top 10 best antivirus software in 2021

Franklin Izuchukwu
By Franklin Izuchukwu

Internet hack and spread of computer viruses are on the rise. Antivirus software is used to prevent computer viruses and other malware; here is a list of the top 10 best antivirus software to use in 2021.

A hacker trying to access a computer system.

The contemporary world is now a world of the internet and cybersecurity. The ease that comes with the internet also cleared the ground for cyber intrusion and internet crime.

Hackers employ various means to get access to secret data, files and servers. Some of the known methods they use are computer viruses, worms, spyware, ransomware, trojan horse, etc.

Some hackers have also deployed stealth and effective means of accessing credentials through email attachments and phishing.

Unethical hackers also spread computer viruses through pirated software programs. They also intrude on users' privacy by exploiting unfixed bugs in a software program.

Many websites focus on deploying malicious content to steal users' data as they surf the web. Dishonest developers also use bots to scrape data from the web.

The issue is how users can control their data and deny unwarranted access to computer viruses and other malicious scripts.

A computer virus is a set of code deployed to implement spurious actions by inserting its code in other programs with the sole aim of modifying these programs.

In summary, a computer virus can

  • Steal your data,
  • Corrupt your file
  • Prevent accessibility,
  • Crash your network and even computer systems, etc

This article will highlight the top 10 best antivirus software to use in 2021. A thorough investigation has revealed the uniqueness linked with the top 10 best antivirus software in 2021.

Clacified has a detailed article on how to use antivirus software to improve data security; for a comprehensive approach to the use of antivirus software.

At the end of this article, readers are expected to:

  • Know the top 10 best antivirus software in 2021
  • Understand what to look out for in any antivirus software

Below is the list of the top 10 best antivirus software in 2021.

Bitdefender has won many awards from one of the major anti-virus assessment firm, AV-Comparatives.

1. Bitdefender antivirus

Bitdefender is a cybersecurity company founded in 2001, and it is located in Romania. Bitdefender is the best antivirus software to use in 2021.

Bitdefender ranks as the best antivirus software in the market today because of its mode of operation.

Bitdefender combines a massive database, machine learning and artificial intelligence to combat computer viruses and other malware.

Apart from its defence against computer viruses, Bitdefender offers other cybersecurity services. Bitdefender is used:

  • To prevent ransomware
  • To Monitor online purchases and other web-based transactions
  • For password management

Bitdefender offers android, macOS, iOs and windows versions.

Bitdefender's scanning action is cloud-based, ensuring virtually no strain or strain on computer systems, even on dull disk scanning.

Bitdefender advises Europol's European Cybercrime Centre (EC3) in investigations against cybercrime. They are also part of the cybersecurity tech accord for a safer online world.

Bitdefender offers entry-level access for users who are not tech-oriented with its Bitdefender plus package.

A one-year security package on Bitdefender cost about $39.9 though Bitdefender charges an additional subscription fee for a Virtual Private Network (VPN). Bitdefender also offers a 30-day free trial for subscribers.

Norton antivirus software offers services in webcam protections.

2. Norton 360 Antivirus

Norton Lifelock is an American software company responsible for the Norton antivirus. Norton antivirus is the 2nd best antivirus software to use in 2021.

The Norton antivirus was founded in 1991 as an inclusion to the Norton family of software security products.

Norton antivirus uses the Signatures and heuristics model of virus detection to protect computer systems from malware invasion.

Norton utilizes only about 24MB of a computer's RAM for a full-system scan; once a virus is detected, it is removed by moving it into the pandemic definitions file.

Norton antivirus is used for malware prevention, password management, identity theft, etc.

Norton antivirus software offers support for Windows, macOS, Android, iOS. The Norton 360 antivirus software comes with:

  • Firewall protection
  • VPN
  • Webcam protections
  • Dark web monitoring
  • Cloud storage

PCWorld placed Norton antivirus in the first position after it carried out a test on some security software in 2009.

The yearly subscription of Norton AntiVirus Plus costs about US$20, while the Norton 360 Deluxe is US$34.99/year.

McAfee antivirus software made the list of the top 10 best antivirus software to use in 2021.

3. McAfee antivirus

The 3rd on the list of the top 10 best antivirus software in 2021 is McAfee. McAfee is an American software security company listed on the Nasdaq.

McAfee has been in the business of software security since 1987.

The McAfee antivirus software uses an encrypted storage system. McAfee antivirus software prevents virus attacks on computer systems. It also serves as a password manager. McAfee antivirus provides a secured internet connection through a quality VPN.

The VPN offered by McAfee is Tunnelbear-powered.

McAfee offers users different package plans to meet unique needs. For instance, the McAfee Total Protection Family package supports up to 10 devices, which is good for families with kids. It also offers complete parental control on devices.

One year subscription on McAfee total protection package for a single device costs about $85, while the family plan subscription costs up to $55.

Trend Micro antivirus software was founded by three japanese Nationals.

4. Trend micro antivirus

Trend micro is an American-Japanese multinational company founded in 1988. Trend Micro developed the Trend micro antivirus software. The Trend Micro antivirus ranks as the 4th best antivirus software to use in 2021.

Trend Micro antivirus is one of the best tools against phishing attacks or intrusion.

Trend micro antivirus software uses advanced AI systems to detect ransomware and other virus attacks. Trend micro antivirus uses a cloud-client content security infrastructure to protect users from online threats.

It uses global threat intelligence to prevent malware, phishing, email and mobile attacks.

Trend Micro entered a collaboration with Panasonic in February 2018 to build more secure systems to protect electronics in automated cars. In April of the same year, Trend Micro released a new AI tool to detect individuals' writing styles and prevent email fraud.

Though effective in protecting against phishing attacks, Trend Micro antivirus has been noted to slow down the computer system when in use. Most packages for the Trend micro antivirus software is meant for windows system only.

The Premium Security Suite package in Trend antivirus software can support up to 10 devices and costs $40.

Kaspersky antivirus software is one of the oldest antivirus software in the world.

5. Kaspersky antivirus

Kaspersky is a Russian cybersecurity corporation that was founded in 1997. The company owns the Kaspersky antivirus software. Kaspersky antivirus software is the 5th best antivirus software to use in 2021.

Kaspersky lab produces antivirus software and other cybersecurity software. Kaspersky antivirus software also offers services on internet security and password management.

Kaspersky antivirus has a Safe Money feature that typically detects when a user is about to make payment online (or access any banking website) and then launches a safe browsing window that cannot be intruded on by malware or spyware.

Kaspersky antivirus also comes with a virtual keyboard that allows users to type, handle online payment and prevent keyloggers.

The Kaspersky Total Security is a good fit for parents who wants access to parental control software. It costs about $45/year.

Around early 2010, Kaspersky exposed numerous government-sponsored cyber attacks. They discovered malware like Stuxnet, Duqu, etc.

Avira antivirus software uses cloud-based scanning to reduce lag on computer systems.

6. Avira antivirus

Avira antivirus software is an American cybersecurity software that NortonLifeLock acquired in January 2021. Avira antivirus is the 6th best antivirus software to use in 2021 due to its many features.

Avira antivirus makes use of the heuristic model of virus detection to find unknown computer viruses and malware. Avira antivirus software offers:

  • Real-time scanning for computer viruses
  • Cloud-based scanning (to avoid slowing down the computer system)
  • Dedicated firewall
  • Automated software update (to keep all apps up to date)
  • privacy tools

Avira antivirus offers a free version of malware protection for its users. However, it comes with limitations. The pro version of the Avira antivirus software houses loads of necessary features, as seen in the image below.

Features and the prices of Avira antivirus software pro version.

After a lab test in 2021, AV comparatives rated Avira antivirus software as one of the best. Wikipedia reported that as of 2012, Avira antivirus has about 100 million users.

Avira antivirus software has support for iOS, Android, Mac and windows.

ESET antivirus software is one of the few antivirus programs that are configuarable.

7. ESET antivirus

ESET is a Slovak internet security company that produces antivirus and firewall protection software. ESET antivirus was founded in 1992 and ranks as the 7th best antivirus software to use in 2021.

The available features in ESET's NOD32 version may not be the best for beginners, but it certainly gives lots of room for tech-savvy users. NOD32 is configurable. Thus, it gives tech experts a high level of control.

ESET antivirus has a slender system footprint; this feature is a good treat for the heuristic detection and URL filtering model.

ESET antivirus still offers users premium packages to meet high-end needs. Users can also use ESET antivirus for smart and internet security.

ESET antivirus also has endpoint security for Windows, Linux, Mac and Android. It also offers services in encryption and parental control.

Gartner Peer Insights recognised ESET in the 2019 Customers’ Choices on the “Voice of the Customer”.

The NOD32 package costs about $40, while the ESET smart security premium goes for $60. The above is the reason ESET antivirus is on the list of the top 10 best antivirus software.

K7 antivirus software was launced in 1991.

8. K7 antivirus

K7 total security is an antivirus and antimalware produced by the K7 computing LTD. K7 antivirus software was founded in 1991. With its many features, K7 antivirus made Clacified list of the top 10 best antivirus software to use in 2021.

K7 antivirus is the 8th best antivirus software to use in 2021.

K7 antivirus software uses the signature and heuristic model of detection to identify and remove computer viruses. K7 antivirus offers spam, firewall and phishing protection.

It also employs machine learning programs for more effective actions with a low impact on a computer system during on-scanning.

According to the company's website, K7 antivirus has a presence in 27 countries. It is also among the top antivirus software in Japan.

Over 40 million devices use K7 antivirus software at press time.

Total AV is another antimalware computer program.

9. Total AV antivirus

Total AV is antivirus software. Total AV is the 9th best antivirus software to use in 2021. It made the list of the top 10 best antivirus software because it uses the Avira antivirus technology.

Total AV antivirus software is used as an:

  • Anti-malware
  • Anti-spyware
  • Anti-ransomware

It is also used to provide real-time protection in computer systems. Total AV is known to reduce the start-up time and lag in computer systems.

Total Av renders services to increase battery life by shutting down some background applications. The VPN offered by Total AV will help users to surf the web more securely and prevent intrusions.

According to its website, Total AV has more than 25 million users. Total AV has been known to participate in malware protection testing. The results have led to favourable awards from independent testing agencies.

Total AV has received 3-star ratings from AV-comparatives in October 2020, march 2021 and April 2021.

Avast antivirus software has free and premium packages.

10. Avast antivirus

Avast antivirus is a cross-platform software that is used to prevent malware and ransomware attacks.

Avast antivirus is one of the most popular antivirus software globally, thus making the list of the top 10 best antivirus software to use in 2021.

Avast antivirus reportedly ranks as the 10th best antivirus software in 2021. Avast antivirus was launched in February 2015 and therefore is relatively new, unlike its counterparts.

Avast antivirus is a freeware product; however, the premium product with loads of features has been introduced.

Avast premium security offers users a:

  • firewall,
  • file shredder and
  • Wi-Fi Inspector (to report network vulnerabilities)

Other features like privacy tools are also available on the Avast premium security to prevent identity theft and loss of other personal data.

Users can also use the Avast antivirus to keep tabs on any software updates or installations needed. Avast premium security is configurable - a huge advantage for tech experts who want more personalisation options.

Avast company website claims the Avast antivirus software has garnered over 435 million users from all over the globe. According to Avast, they are responsible for preventing over 1.5 billion malware attacks every month.

In February 2018, Avast received 6/6 points on a test carried out by AV-comparatives on various antimalware products.

Avast premium security costs about $60, while the Avast ultimate is about $100.


There are other top-notch antivirus software and tools in the market, but Clacified can only afford to mention a few to help users make the better choice.

The list of top 10 best antivirus software to use in 2021 is a mere guide that tabulates each antivirus software's necessary information and features.

Many a time, the majority of antivirus software use the same method to protect computer systems. This proves that each computer system can do with only one antivirus software at a time.

In the course of choosing the best antivirus software to use, Clacified will advise users to put all factors into consideration.

Factors like price, model of detection, and the type of engine that powers the antivirus software are important when choosing the best antivirus software to use.

Users can always test run this antivirus software by trying out some free packages before going premium.

One of the easiest steps of keeping computer systems secure is a constant update of all application software - this is the first and golden step users can take to ensure data security.