Best free antivirus software for 2024

While most devices come with built-in protection against malware, such as Windows Defender or XProtect for Mac, these basic antiviruses often fall short against advanced threats like keyloggers and ransomware. Many users believe that third-party antivirus software is expensive, but that's not always the case. There are numerous free antivirus solutions available that offer excellent protection rates.

However, free services often come with hidden costs, such as advertising. To find the best free antivirus solutions, I worked with the researchers to test 26 antivirus providers over a week, using in-house and independent lab tests. I evaluated antivirus performance impact, features, compatibility, usability, and free version features.

While testing, I noticed that some of the free versions can provide robust protection comparable to paid versions. My listed free antiviruses offer comprehensive features and reliable security to keep your device safe. Continue reading to find the best free antivirus options available.

Best completely free antivirus

TotalAV is the best free antivirus on the market because of its unlimited free plan, excellent malware protection rates, and real-time security from threats while browsing.

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Top 5 best free antivirus in 2024

1. TotalAV – best overall free antivirus for Windows in 2024
2. Bitdefender – free PC antivirus with threat protection
3. Avira – reliable and lightweight free antivirus for comprehensive protection
4. Malwarebytes – effective on-demand malware removal
5. AVG Antivirus – free antivirus with enhanced web protection

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Our team of researchers thoroughly tests antivirus software following a well-established testing process. In unison, our experts combine in-house and independent testing lab findings with first-hand experience to help you make informed decisions about each product. Learn how we test antivirus software.

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Is free antivirus good enough?

Many free antivirus options offer robust protection against common threats, providing essential defense against malware, viruses, and spyware. These programs are often lightweight, user-friendly, and easy to install, ensuring minimal impact on system performance.

However, free antivirus solutions come with limitations. They typically lack advanced features like ransomware protection, phishing protection, firewalls, and parental controls, which are crucial for safeguarding sensitive information. Free versions may also receive fewer updates and limited customer support, leaving you vulnerable to new threats. Additionally, they can come with hidden costs such as ads and data collection.

While free antivirus software is adequate for basic protection, investing in a paid solution offers comprehensive security and peace of mind, especially if you handle sensitive data.

Expert comment

Nijolė Simaitienė

Tech copywriter and security expert

A free antivirus can be a smart way to test the software before upgrading to a paid version. Free utilities can be quite beneficial for everyday users. They provide essential protection against common threats like malware and viruses at no cost, making them ideal for securing devices without spending money. Free antivirus programs are generally easy to use, lightweight, and regularly updated to protect against new threats, ensuring your device runs smoothly.

However, these software have their limitations. They typically lack advanced features such as ransomware protection, phishing protection, firewalls, and identity theft protection. This means that while they can handle basic threats, they may not be sufficient against more sophisticated attacks. Additionally, free versions often come with ads and limited customer support. For those handling sensitive data or needing comprehensive security, investing in a paid antivirus is advisable in the long term.

Our recommended free antivirus for 2024

Some of the free antivirus solutions we tested in-house outperform commercial options. During the process, I’ve evaluated 26 free antivirus programs to help you find the best one for your needs and budget.

1. TotalAV Free Antivirus – best free antivirus software for Windows in 2024

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Based on our tests, TotalAV is the best free antivirus software on the market. It offers robust malware protection and a suite of useful features, making it a smart option for those wanting to test the software before considering a premium upgrade.

Test results. The independent testing labs gave TotalAV a perfect score. According to the AV-TEST, TotalAV blocked 100% of older malware and 98.2%-99.1% of zero-day threats. In our in-house TotalAV evaluations, we used malware samples, and it blocked 81.3% of malware when scanning and 78.6% when testing the real-time protection. These results highlight the effectiveness of the TotalAV free version, which is similar to Bitdefender's high detection rates but without system optimization tools.

Free features. From my experience, while testing TotalAV, I found the free version to be quite robust. It includes anti-malware and anti-phishing features, effectively protecting against malicious software and phishing attempts. The malware scans, including quick, folder, and full hard disk options, thoroughly identified and quarantined threats. System optimization tools like junk file cleaning, browser cleanup, and disk space management noticeably enhanced performance. Additionally, the web protection through browser security extensions successfully blocked access to malicious websites, safeguarding my online activities.

I particularly liked the comprehensive malware scans and effective optimization tools, along with the user-friendly interface. The breach scan feature was also helpful in checking if my email was in leaked databases.

However, TotalAV lacks real-time protection, a significant limitation compared to competitors like Avira, which offers more features but is more complex to navigate. The uninstaller feature was slow in removing applications, making it less efficient than using the Windows control panel. Advanced features such as ransomware protection, password vault, and VPN access are reserved for premium versions, limiting the free version's capabilities.

Ease of use. TotalAV is easy to use, with an intuitive interface across Windows, macOS, iOS, and Android. Installation takes just a couple of minutes. The minimalistic design makes finding features and scans easy. However, the uninstaller feature is slower than the one in the Windows Control Panel.

Why choose TotalAV? TotalAV Free Antivirus is ideal for users seeking straightforward, effective malware protection. It's perfect for those needing basic security without advanced features, and it's free. For comprehensive security, upgrading to a premium plan starting at $19.00/year for up to three devices is advisable.

2. Bitdefender Antivirus Free – feature-packed completely free antivirus for PC

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Bitdefender is a leading provider in the free antivirus software category, offering a robust free version for Windows. It provides excellent malware protection with features like web attack prevention and real-time protection.

Test results. Based on independent AV-TEST, Bitdefender blocked 100% of both widespread and zero-day malware. When testing Bitdefender in-house, it blocked 80.6% of malware when scanning and 83.3% when testing the real-time protection, which is similar to TotalAV’s performance.

Free features. While testing Bitdefender, I found its free version highly effective. It includes a virus scanner with quick, system, and custom scan options to identify and remove threats. The real-time protection continuously monitors and blocks malware, preventing infections from taking hold. The Advanced Threat Defense uses behavioral detection to monitor active apps and takes immediate action if it detects anything suspicious. Online Threat Prevention protects against phishing attacks, scans emails, and blocks access to malicious websites.

I particularly liked the robust real-time protection and the advanced threat defense, which provided a strong, continuous layer of security. The ability to scan external drives and enable automatic updates added to its practicality.

However, Bitdefender’s free version lacks system optimization tools like junk file cleaning or disk space management, which are present in some competitors like TotalAV. Additionally, advanced features such as a firewall, parental controls, and VPN access are reserved for premium versions, limiting the free version's functionality.

Ease of use. Bitdefender is easy to use and has an intuitive interface. However, the setup process might take some time. The free version is available only on Windows, while macOS, iOS, and Android apps have a 30-day trial. The user interface is straightforward, with important features like scans readily accessible.

Why choose Bitdefender? Bitdefender Free Antivirus is ideal for Windows users seeking strong, effective malware protection. It offers a comprehensive suite of features for basic security, making it a solid choice for those needing robust protection without advanced features. If you opt for the commercial antivirus, you get more features and multi-device use, with premium plans starting at $9.99/year and covering up to three devices.

3. Avira Free Security – best free antivirus for Apple users

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Avira Free Security is among the top free antivirus software providers, offering strong malware protection with a user-friendly interface and a free VPN. It is a nice choice for both Windows and Apple users, providing reliable protection and a range of useful features.

Test results. According to AV-TEST, Avira achieved a 100% detection rate for older malware and 99.4% for zero-day malware on Windows. On macOS, Avira blocked 99.2% of threats. It caught 87% of malware during in-house Avira testing. These results place Avira on the same level as top providers like TotalAV and Bitdefender.

Free features. While testing Avira Free Security, I was impressed by several key features it offers. The malware scans, including quick, custom, and full scans, effectively identified and quarantined threats. Real-time protection continuously monitored my system to prevent malware infections. The System Optimizer tools, which clean junk files and manage startup programs, significantly enhanced PC performance. Additionally, Avira’s Phantom VPN, with a 500MB monthly data limit, and the limited Password Manager were useful additions.

I particularly appreciated the comprehensive system optimization tools and the ease of use. The inclusion of a basic VPN and a Password Manager added value, providing a more rounded security solution.

However, the free plan lacks web protection and customer support, which are available in premium versions. Unlike Bitdefender, which offers advanced threat defense, Avira’s free version is more focused on user-friendly tools and system optimization.

Ease of use. Avira is very intuitive and easy to set up on Windows, macOS, Android, and iOS. This makes it one of the best free antivirus options for PCs and Apple devices. The installation process is straightforward, and the interface is easy to navigate, making it accessible to all users.

Why choose Avira? Avira Free Security is ideal for users seeking a feature-rich antivirus with essential protection and high malware detection rates. It’s perfect for those needing basic security with added tools like a VPN and system optimizer. For more advanced features, such as web and email protection or software and driver updates, a premium upgrade is required, with plans starting at $26.99/year for up to five devices.

4. Malwarebytes – intuitive and basic free antivirus for multiple devices

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Malwarebytes offers powerful protection against malware threats without the price tag. It effectively scans and removes viruses, spyware, adware, and Trojans, keeping your PC safe from unwanted intruders.

Test results. According to AV-TEST, Malwarebytes Premium had a 99.9% success rate with older malware and 99.2% with 0-day malware attacks. During my Malwarebytes testing, it blocked 88.6% of malware during scans and 0% when testing the real-time protection.

Free features. In my testing of Malwarebytes Free, I found it to be an effective tool for thorough on-demand cleaning. It offers custom and full system scans to detect and remove malware efficiently. The detection history feature allows users to review previously detected malware and false positives, while the Browser Guard extension provides protection against phishing sites, ads, trackers, and potentially unwanted programs (PUPs).

I particularly appreciated the ability to enable rootkit scanning and automatic updates. However, I noticed some significant limitations compared to competitors like Avira and Bitdefender. Malwarebytes Free lacks real-time protection, so it won't actively prevent malware infections while browsing the web or downloading files.

It also does not offer scheduled scanning, so scans must be initiated manually, making regular system maintenance less convenient. Additionally, advanced features such as exploit protection, detailed threat reports, and system optimization tools are reserved for the premium version.

Ease of use. Malwarebytes has a user-friendly interface that is accessible for both tech-savvy users and beginners. The installation process is quick and straightforward, with minimal user input required. The clean interface guides users through key features easily. Unlike AVG, which bombards users with ads and upgrade prompts, Malwarebytes offers a clean user experience focused on functionality.

Why choose Malwarebytes? Malwarebytes Free is ideal for users seeking a reliable and easy-to-use tool for on-demand malware removal. It’s perfect for those who need a secondary layer of protection alongside a primary antivirus solution. I recommend upgrading to the Premium plan at $44.99/year for comprehensive protection, including real-time threat prevention.

5. AVG Antivirus – free antivirus for safe browsing and email protection

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AVG Antivirus Free stands out with its robust web and email protection, blocking unsafe links, downloads, and attachments to ensure a secure online experience. This antivirus goes beyond malware protection by helping optimize your system's performance, providing a unique blend of security and efficiency.

Test results. According to AV-TEST, AVG achieves a 100% detection rate for both widespread and zero-day malware, earning a perfect 6/6 score in protection. In my in-house AVG Antivirus tests, AVG's Deep scan detected and removed 80.6% of malicious files (121 out of 150), though it reported finding 134 threats, indicating no false positives​.

Free features. During my testing of AVG Antivirus Free, I was impressed by its extensive range of features. It offers multiple scan options: Smart, Deep, File or Folder, Boot-Time, USB/DVD, and Performance scans. Real-time protection, including File Shield and Behavior Shield, is highly effective and rare for free software.

Additional features such as Ransomware Protection, Network Inspector, Web Shield, Email Shield, a limited Firewall, Do Not Disturb Mode, Data Shredder and a Rescue Disc tool add significant value.

I appreciated the comprehensive coverage and ease of use. However, the free version has its limitations. The firewall is restricted and lacks advanced functionalities like leak protection and port scan alerts. It also misses the Hacker Attacks feature, which protects browser-stored passwords and blocks unwanted remote connections. The Personal Data feature, including webcam protection and Sensitive Data Shield, is also reserved for the premium version.

Ease of use. AVG’s intuitive interface is accessible to both beginners and experienced users. The installation is straightforward, and the software is easy to navigate without excessive ads or upgrade prompts.

Why choose AVG Antivirus? AVG is ideal for users seeking a reliable and user-friendly antivirus with strong web and email protection. It’s suitable for those who need a straightforward security solution that doesn't significantly impact system performance. Upgrading to a premium plan is recommended for more advanced features, with prices starting at $31.20 per year​.

How we selected and tested the best free antivirus software

To curate this list of free antivirus providers, the research team and I spent over a week testing each provider. We assess antivirus programs based on their ability to detect malware, their features, ease of use, compatibility, and the availability of free versions, trials, or money-back guarantees. These criteria form the basis for our evaluations of each selected antivirus program.

However, not every free antivirus is trustworthy or effective. That’s why we carefully identified whether the provider can scan for malware without impacting performance, the effectiveness of malware protection, and if using the antivirus won’t be a puzzling task:

• In-house tests. We conduct meticulous in-house tests, where we evaluate and select providers. This enables us to compare the results with independent laboratory tests and curate a list of only the most efficient free antivirus solutions.
• Independent lab tests. Since free antiviruses don’t have much to offer aside from basic security, it’s best to opt for services that guarantee excellent malware detection rates. That’s why we researched independent lab tests, such as those of AV-TEST and Virus Bulletin.
• Performance impact. We selected antivirus providers that have the least impact on your device's performance, so you can use the antivirus and perform tasks on the device without any latencies.
• Features. We looked at what features free antiviruses include. While you shouldn’t expect a big feature array, you should at least get some features. This could be real-time or ransomware protection.
• Compatibility. We made sure that the services we included in the list are compatible with many different operating systems.
• Usability. We only included apps that are easy to get the hang of for beginners. We also made sure to provide you with free services that don’t clog the app with constant pop-ups urging you to upgrade.
• Free version. We made sure that all listed providers offered free service. This means a completely free version.

Comparison of the best free antivirus software

If you feel overwhelmed with the amount of information found about free antivirus software, this comparison table with all the key aspects will help you out:

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Free antivirus vs paid antivirus

While free antivirus can protect from already known malware threats, a paid antivirus can help protect against new and zero-day virus detections and removal. On the other hand, premium antivirus software offers robust protection from both known and zero-day threats targetting your data and device.

There are good free antiviruses like TotalAV, Avira, or Bitdefender, but premium programs constantly protect your device from online threats as you’re browsing the web. Moreover, paid quality antivirus programs offer many useful features that boost your online experience and safety. For example, they come with in-built VPNs, password managers, or various browser extensions that can be of great use for beginners and advanced users.

Meanwhile, reputable free antivirus software can be enough. Free versions or trials of paid antivirus providers use advanced technologies to protect you from malicious threats. They also include real-time protection, which safeguards you from phishing and ransomware attacks. While paid antiviruses are richer in features, free providers, like TotalAV, can do the job if chosen wisely.

How to choose the best free antivirus

Selecting the best free antivirus involves focusing on a few key factors. First, define your needs. Consider whether you need basic protection, a VPN for secure browsing, or a comprehensive suite that includes identity theft prevention and a password manager. Check the malware detection rates by consulting independent lab tests from AV-Test or AV-Comparatives, as higher detection rates indicate better protection. Also, ensure the antivirus is compatible with your device and operating system, whether it’s Windows, macOS, or mobile.

Additionally, consider the performance impact. Choose an antivirus that won’t significantly slow down your device during scans. Look for extra features such as real-time protection, password managers, and web protection, which are often included in free trials of premium software. Real-time protection is particularly beneficial as it continuously monitors for malware. Finally, ensure the antivirus provider offers accessible customer support, such as 24/7 live chat or email support, to resolve any issues promptly. By considering these factors, you can select a free antivirus that offers robust protection and meets your specific needs.

Do I need antivirus software if I have a Windows Defender?

Even though you have Windows Defender built into your computer, we still recommend using third-party antivirus software. Windows Defender is a pre-installed antivirus software that offers only basic malware protection, unlike free antivirus software. While Windows Defender provides a lightweight solution and integrates well with Windows devices, it’s highly recommended to use antivirus software for extra protection.

The limitations of Windows Defender include its basic feature set, vulnerability to zero-day attacks, limited customizability, lower malware detection rates compared to third-party options, and the lack of additional security layers.

Meanwhile, antivirus software providers are more versatile and secure than free antivirus providers. Paid programs offer advanced features, better protection against emerging threats, malicious threats, or malicious software, customization options, and additional security layers like firewalls and secure browsing. However, free antivirus software lacks versatile features but still adds an additional layer of security to your Windows device.

Choosing between Windows Defender and antivirus software depends on personal preferences and the desired level of security. While Windows Defender suits most users, those seeking advanced features or enhanced protection may benefit from using additional antivirus software.

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Which free antivirus programs should you avoid?

While there are several reputable free antivirus programs available, users should be cautious and avoid certain well-known options due to various concerns.

Avast, once a popular choice, faced significant privacy issues when it came to light that its free version not only collected but also sold user data, raising serious privacy concerns.

Adware, though historically known for combating adware, has lost its effectiveness against modern threats.

You should look for reliable alternatives like TotalAV, Avira, or Windows Defender to ensure comprehensive and trustworthy security. Read more on how to choose free antivirus.

Video review: best free antivirus in 2024

Join us in a video guide as we break down the pros and cons of each free antivirus program. It will guide you towards the perfect choice to ensure your digital life remains secure in the face of evolving cyber threats:

Is it worth paying for an antivirus?

Yes, investing in a paid antivirus is undoubtedly worth it for those looking for boosted online security and a risk-free online experience. Premium antivirus options provide not only stronger protection but also a range of additional features, including webcam protection, identity theft protection, and child protection features for age-inappropriate websites.

The benefits extend beyond features, as paid antivirus subscriptions often come with premium customer support available 24/7. Unlike most free plans, where users rely on FAQs.

While free antivirus software is excellent for basic protection, a paid antivirus ensures top-notch security, additional freebies, and quality customer support. For those looking to combine comprehensive security with additional features and reliable support, opting for a paid antivirus, such as TotalAV, is highly recommended.

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