(Last updated on February 4th, 2019)

Bitdefender or Windows Defender, which antivirus software is better?

Read this comprehensive, data-driven comparison to make a smart decision.

In this detailed guide, you’ll see how Bitdefender and Windows Defender compare in terms of features/tools, malware protection, impact on system performance, user interface, and price.

The so-called digital world we live in has become increasingly complex with time. These days, it’s almost impossible to imagine a secure digital life without solid antivirus protection, regardless of whether you prefer Windows or macOS.

Do you know the AV-Test institute — which is a reputable independent security firm — claims to catch over 300,000 new malware samples every single day?

The bad guys of the internet (called “hackers”) are always coming up with new (and clever) ways to breach your privacy, drain your bank account, spy on your digital activities, and so on.

If you don’t take measures to safeguard your data and privacy, it’s just a matter of time before you’ll become yet another victim of some widespread malware attack.

Even if you think you’re a careful web surfer, experts say that you still need reliable antivirus protection to stay protected from a range of ever-evolving threats (such as ransomware, viruses, spyware, worms) that are out there in the wild.

Important Note

Bitdefender Total Security 2019 EDITION

Best Antivirus Suite for 2019

(Out of the 54 security suites examined)

Editors' Choice Award Winner 

Overall Score: 9.9/10

44% OFF

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During the past few months, we evaluated and reviewed over 50 antivirus suites from the biggest names in cybersecurity, so you can confidently choose the best antivirus software to protect your data and privacy.

Overall, Bitdefender is our top antivirus recommendation for 2019, because of how well it performed in the recent independent lab tests conducted by AV-Test and AV-Comparatives.

Right now, we think that Bitdefender Total Security 2019 (currently at 44% off) is the best antivirus package available in the market. Besides providing excellent malware protection, it offers all the advanced premium features and utilities that must be there in a high-end package - and best of all, it offers excellent value for money. You can protect up to five devices (PCs, Macs, and smartphones) with a single license of this suite.

If you have more than five devices in your household, we recommend Bitdefender Family Pack 2019. With a single license of this suite, you can install Bitdefender Total Security suite on an unlimited number of devices.

Now, let’s start off the detailed comparison.

If you don’t have time to read the whole comparison and want the answer straightaway, take a look at the graphic below and also read our short verdict to make your mind.

Bitdefender vs Windows Defender Comparison Summary

Short Verdict

Bitdefender is the winner as it offers more security-enhancing features and extra utilities in its security suites than Windows Defender. Also, independent tests prove that Bitdefender is better than Windows Defender in terms of both malware detection and impact on system performance. 

Our recommendations: Overall, after examining over 50 antivirus suites from different companies, we think that Bitdefender Total Security 2019 (currently at 44% off) is the best antivirus package you can buy in 2019. You can protect up to five devices (PCs, Macs, or smartphones) with a single license of this suite.

If you have more than five devices, Bitdefender Family Pack 2019 might be the best option for you.

If you're looking for a security solution for Mac, we recommend Bitdefender Antivirus for Mac 2019 for maximum peace of mind and great value for money.

Finally, let the battle commence…

Bitdefender vs. Windows Defender: Which Software Offers More Features/Tools?

First, let’s see what’s included Bitdefender’s security products.

Like Microsoft, Bitdefender offers a free antivirus solution for PCs, called Bitdefender Free. Unsurprisingly, there are no advanced protection-related features or tools jammed into the freeware, but it does protect against a range of malware threats, like viruses, worms, ransomware, rootkits, and more. Protection against web-based (or online) threats is also incorporated into the free solution.

Next level up is Bitdefender Antivirus Plus 2019 – the company’s entry-level premium offering for the Windows users. Besides providing excellent protection against all kinds of malware threats, it offers several useful premium features/tools, including a hardened web browser (protects you sensitive details while you shop online), a Vulnerability Scanner, a password manager utility (stores all your passwords and other credentials to eliminate hassle), and a file shredding tool (lets you safely delete your confidential files).

Extra multi-layered protection against ransomware attacks is also included in the “Plus” suite. Also, a single license of this suite will protect up to 3 PCs.

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Next up is another Windows-only package, called Bitdefender Internet Security 2019. Along with everything found in the “Plus” package, it includes a useful firewall module (proactively monitors your network and blocks malicious traffic), an encryption utility (lets you create virtual, password-protected drives on your computer), and parental controls (helps control what your kids can do online and limit their access to age-sensitive content).

Protection against junk/phishing emails and webcam spying is also included into the “Internet Security” package.

You can protect up to 5 PCs with a single license of this suite.

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Bitdefender Total Security 2019 (compatible with PCs, Macs, and smartphones) is the company’s most popular security suite. It includes everything that comes as part of the “Internet Security” suite, plus a useful anti-theft feature (helps track lost or stolen devices) and several performance tools, like OneClick Optimizer and Disk Clean-up.

Also, a single subscription of the suites allows you to protect up to 5 devices (PCs, Macs, Android, and iOS) in any combination.

Out of all the high-end security programs we have reviewed, Bitdefender Total Security 2019 (currently at 50% off) is the best in terms of value for money.

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If you want protection for more than 5 devices, Bitdefender Family Pack 2019 might be the best option for you. A single license of this suite allows you to protect an unlimited number of Windows, Mac, Android, and iOS devices with the “Total Security” suite.

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Bitdefender's Security Suites Features Comparison

Now, let’s see what’s included in Windows Defender.

Most antivirus companies offer a range of security suites at different price points, but Microsoft only offers a free security solution, called Windows Defender Security Centre (formerly Windows Defender).

It provides protection against a range of malware threats (including viruses, ransomware, worms, Trojans), but you won’t find many advanced protection-related features and extra utilities included in the freeware.

The most useful feature of the product is its advanced two-way firewall. It keeps an eye on your network and monitors all the incoming and outgoing traffic for malicious activity.

Parental Control is another useful utility included in the package. It lets you control which sites your children can visit, when they can go online, and how much time they can spend online in a day. But the downside is that these features only work with the Microsoft Edge browser.

Other than the two utilities mentioned above, there isn’t much included in Windows Defender. It lacks advanced features/tools like file shredder, VPN, password management tool, automatic backup utility, and more.

Overall, Bitdefender offers more security-related features and extra utilities in its security suites than Windows Defender.

Winner: Bitdefender

Bitdefender vs. Windows Defender: Which Software Offers Better Malware Protection?

It’s imperative for a security product to provide top-notch protection against all kinds of malware threats.

Usually, most modern antivirus products offer three levels of protection: a traditional signature-based scanner (compares suspect code against a huge library of malware definition files), a heuristic scanner (checks for behavioural attributes to detect zero-day malware), and a company cloud server (that’s where suspicious files are sent for a more thorough examination).

To see how Bitdefender and Windows Defender stack up in terms of malware protection, I will look at the most recent lab tests conducted by AV-Test and AV-Comparatives – two popular and respected independent security institutes that comprehensively (and continually) evaluate top security software against different criteria.

The most recent AV-Test evaluations were conducted in September and October 2018. All participating products were tested against both widespread and zero-day malware samples.

Bitdefender was among one of the few products that registered perfect results in the tests; it successfully detected all malware samples it encountered during both months, earning a full 6/6 rating from the AV-Test experts in the “Protection” category.

Bitdefender's protection test result when conducted on Windows 10 by AV-Test on Sep-Oct 2018

Windows Defender also registered perfect results against widespread malware, but its overall rating was brought down by lower protection rates against zero-day malware.

It received a lower 5.5/6 rating from the AV-Test security experts.

Windows Defender's protection test result when conducted on Windows 10 by AV-Test on Sep-Oct 2018

The experts at Austrian lab AV-Comparatives conduct several exhaustive tests to examine the effectiveness of a security product against malware infections. Real-World Protection Test and Malware Protection Test are the two main tests that are particularly useful to look in this regard.

The recent Real-World Protection Test report published by the lab includes summarized results of five monthly tests which were conducted between July and November 2018.

Bitdefender earned the highest “ADVANCED+” award in this test, because of its near-perfect 99.9% protection rate with just 2 false positives.

***False positive is when a security product wrongly identifies a clean file/URL as malware-infected.

AV-Comparatives real-world protection test awards - July to November 2018

Windows Defender received the second-best “ADVANCED” award in this test. Its protection rate was 99.5%, but it also gave a high number of false positives (106) which degraded its overall score.

The recent edition of the Malware Protection Test was held in September 2018. Bitdefender once again received the best “ADVANCED+” award in the test, due to its excellent 99.99% protection rate and a low number of false detections.

Windows Defender registered impressive 99.99% protection rate but gave a whopping 32 false positives, which means it had to settle for the second-best “ADVANCED” title.

AV-Comparatives malware protection test awards - September 2018

Overall, Bitdefender is the winner in this category as it got excellent scores in all the independent tests we considered.

Winner: Bitdefender

Bitdefender vs. Windows Defender: Which Software Puts Less Burden on System?

Another important consideration is the impact a security product puts on system performance (or system speed).

Most modern antivirus programs are very efficient at utilizing system resources and do not put a significant negative impact on system performance.

Let‘s look at the recent performance tests conducted by AV-Test and AV-Comparatives to see how both software compare in this category.

AV-Test’s performance study looks at the average influence a security product exerts on computer performance (or computer speed) while executing some common computer operations, such as copying files, browsing popular websites, downloading and installing applications.

Here’re the results of the study with Bitdefender installed:

Bitdefender's performance test result when conducted on Windows 10 by AV-Test on Sep-Oct 2018

Here’s how Windows Defender performed in the test:

Windows Defender's performance test result when conducted on Windows 10 by AV-Test on Sep-Oct 2018

As you can see, Bitdefender earned full marks from the experts in the “Performance” category, while Windows Defender got a lower 5.5/6 rating.

The experts at AV-Comparatives also do a similar test to measure the impact of leading antivirus programs on system performance. The recent evaluation involved 17 security products and was conducted in October 2018.

Bitdefender got the highest “ADVANCED+” title in the test, because of its impressive impact score (the lower the score, the better) of 8.7. Windows Defender, on the other hand, put more burden on test systems than any other product and was given the third-best “STANDARD” award.

AV-Comparatives performance test awards - October 2018

So it’s evident that Bitdefender is miles ahead of Windows Defender in terms of the impact on system performance.

Winner: Bitdefender

Bitdefender vs. Windows Defender: Which Product Offers a Better User Interface?

Another important point of comparison between both software is the user interface.

First, let’s go over the Windows Defender interface.

Windows Defender Security Centre (formerly Windows Defender) has seen a major overhaul in 2018. It has established its image as a full-fledged security portal from where you can manage everything related to your security and privacy. Also, the interface – which used to be slightly outdated and clunky — is now simple and minimalist, in shades of white, grey, and light blue.

The vertical menu on the left has the following six elements: Home, Virus & Threat Protection, Firewall & Network Protection, App & Browser Control, Device Performance & Health, and Family Options.

Home tab is where you land on when you open the interface. It displays the status of each module and notifies you of problems you need to address. If everything is well, you will also see a reassuring “Your device is being protected” message at the top. The link to access Settings is available at the bottom left corner.

The other menu elements contain relevant features and their settings.

Windows Defender Interface on Windows 10

Now, let’s examine the Bitdefender user interface.

Bitdefender‘s interface is modern, intuitive, and robust, in shades of white, black and light gray.

In the left rail, you’ll find four main tabs, namely Dashboard, Protection, Privacy, and Utilities, along with links for Notifications, My Account, Settings, and Support.

Dashboard is the default view, it shows your current protection status and has buttons that link to different modules, like the Safepay browser, the VPN, etc. The button to initiate a Quick Scan is also available on the window. Also, you can customize the look of the Dashboard by adding different widgets.

The other three tabs contain relevant features and their settings.

The name of the plan you’re subscribed to is displayed in the top bar.

Bitdefender's new 2019 Interface

Overall, it can be said that both Bitdefender and Windows Defender offer a simple, easy-to-use user interface.

Winner: It’s a tie

Bitdefender vs. Windows Defender: Which Software is Less Expensive?

Here’re the prices of Bitdefender’s security products:

Bitdefender Security SuitesPrice / Device(s) covered
Bitdefender Antivirus Free Edition (Get it)Free (Unlimited Devices)
Bitdefender Antivirus Plus (Get it)$39.98/year (3 Devices)
Bitdefender Internet Security (Get it)$49.99/year (3 Devices)
Bitdefender Total Security (Get it)$49.99/year (5 Devices)
Bitdefender Family Pack (Get it)$69.98/year (Unlimited Devices)
Virus Scanner (Get it)Free (Unlimited Devices)
Bitdefender Antivirus for Mac (Get it)$39.99/year (1 Mac)

Since Windows Defender is a freeware that comes with no additional upgrades, no comparison can be drawn between both software in this category.

Winner: No comparison can be drawn.

Final Thoughts

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Overall Score: 9.9/10

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Editors Choice Award Winner

These days, it’s as important as ever to ensure that your internet-enabled devices are protected from cyber-criminals and hackers.

Our recommendations: After reviewing over 50 antivirus suites from some of the biggest names in the cybersecurity landscape, we believe that Bitdefender Total Security 2019 (currently at 44% off) is the best antivirus suite for 2019 in terms of value for money. A single subscription of the suites lets you protect up to five devices (PCs, Macs, and smartphones) in any combination.

Plus, it comes with premium customer support and a 30-day money-back guarantee.

If you have more than five devices, Bitdefender Family Pack 2019 is the best option for you.

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