7 Best Free Firewall Software for Windows 10 in 2021

5 min read

The firewall is the most ignored feature on any computer. This is mainly because of the unawareness about the firewall and its working and the reason for its existence. We are aware of antivirus software but when it comes to firewalls, there is little to share. Windows 10 has an inbuilt firewall but that is not the only best way to be protected from maleficent entities. You need to implement a firewall from a reputed and reliable source that can effectively block programs from making unnecessary connections and sharing data.

Firewalls act as an intermediary between your system and the internet. Each data packet transferred goes through the firewall to understand its origin and the reason behind its entry into the system. Firewalls can block applications installed on your computers from accessing network connections. This saves your bandwidth by reducing background data wastage while also knowing about the applications that have access to the internet connection. We will focus on only those firewalls that come with numerous features and require minimal intervention after being deployed. The 7 best free firewall software for windows 10 are as follows:

  1. Bitdefender Total Security
  2. Panda Dome Essential
  3. Webroot AntiVirus
  4. ZoneAlarm
  5. GlassWire
  6. Comodo Firewall
  7. TinyWall

Bitdefender Total Security

Bitdefender Total Security is one of the reliable best free firewall software for windows 10 that is relatively cheap for the features that it ships with. A BitDefender total security license gives you a robust firewall along with a great subset of features that include antivirus protection and multilayered ransomware protection.

Bitdefender pays keen attention to the user’s privacy and comes with essential features like anti-tracking, file encryption to prevent its misuse, parental controls to limit access of kids or other users, and s microphone disabling feature when it is not in use.

Bitdefender total security also protects you while surfing the internet by activating anti-phishing, anti-fraud, and anti-theft options that warn you about sharing your data or granting access to another user. Most firewall software slows your computer down but Bitdefender Total Security has a built-in performance optimizer that puts less strain on your system resources.

A single purchase of BitDefender’s total security license gives you the option to use it on 5 devices. So, if you have other devices such as smartphones, tablets, etc you can also install the software on them, log in and protect your devices. Bitdefender total security is relatively cheaper than most paid options while tackling most problems associated with internet security.


  • Use on up to 5 devices
  • Microphone protection

Panda Dome Essential

Panda Dome Essential is also a powerful best free firewall software that comes with an in-built firewall to act as the barrier between the system and the internet connectivity. Apart from the firewall feature, Panda Dome Essential doesn’t disappoint in any manner. There are very few best free firewall software like it that pay such precise attention to various types of internet attacks and breaches.

Panda Dome Essential is one of those best free firewall software that can be a bit overwhelming to implement with so many features on the dashboard but once you know your way around it, your device becomes invulnerable to attacks.Panda Dome Essential includes basic features such as real-time malware detection, speedy cloud-based scanning, URL filtering to block malicious websites, and much more.

Apart from this, it also offers port scanning to look for compromised ports and ping handling. Uses can also check on processes hogging the bandwidth using the in-depth process monitoring feature. If you want to surf the web anonymously, there is also the availability of an integrated VPN with no restrictions on the speed. The software is one of the few that can provide deployment on unlimited devices once you upgrade to its premium tier, which is highly recommended.


  • Integrated VPN
  • In-depth process monitoring

Webroot AntiVirus

Webroot AntiVirus is the tiniest antivirus program in our list that sheds useless graphical features and unnecessary size. It is purely aimed at users that do not want to do the grunt work and want the software to do it for them. Webroot AntiVirus has a built-in is a firewall that actively monitors the threats and informs the user about websites and programs that are requesting access to the computer in some way or other. Webroot AntiVirus has an insignificant size footprint that makes it very easy to run 24/7 without facing any system lag or memory consumption.

With core protection, the antivirus software comes with smart behavior monitoring, accurate real-time anti-phishing, network connection monitor, enhanced anti-ransomware protocols that creates a protective covering whenever you are on the internet.

Webroot AntiVirus is a very economical offering to protect your system in which it offers a 70 day trial to its users. Users can get 100 percent money-back if they are not satisfied with the performance of the webroot AntiVirus. We don’t see many software brands making such claims and suggest you go for it if you need lightweight yet effective best free firewall software.


  • Very lightweight design
  • Consumes negligible system resources


ZoneAlarm has been there for two decades in which it has continued to protect and provide a free firewall system free of cost. Of course, a free-of-cost system comes bundled with advertisements but that does not mean it compromises the system security. It can identify potentially unsafe traffic and prompts the users about it. It selectively hides open ports, and disable malicious programs that can be sharing your data to other websites and servers on the internet.

ZoneAlarm uses a two-way firewall that doesn’t block only applications but also scans for the exchange of data packets to study the incoming traffic requests. ZoneAlarm is stern on the internet surfing activities and alerts the user about the same. We would advise you to go for the paid tier as it opens doors to all the features plus the 24/7 support and removes advertisements from the software.


  • Two-way firewall feature
  • Free tier


We are sure you must have noticed a surge in the promotion of GlassWire is a program that effectively monitors your internet traffic. It is a simple to approach to the firewall that logs all the data exchange taking place whenever the system is connected to the internet. The dashboard depicts the applications that are using the network. GlassWire presents all 5he logged data into a pictorial as well as a graphical representation that is easy to understand. Once you think that the pile-up is too much to handle, you can clear the logs and start afresh.

The USP of GlassWire is its interface that lets even novice users navigate the program with ease. To simplify the firewall implementation, GlassWire has a ‘Ask to connect’ feature that lets you make the decision of allowing internet access to an application. If you use the same pc for both work and play, GlassWire has a profile feature that shuts down or activated programs relevant to your use case scenario. GlassWire isn’t free and comes at an admissible price for very few features but is one of the simplest best free firewall software.


  • Lucid interface
  • Detailed logs about network activity

Comodo Firewall

Comodo Firewall is probably the best free antivirus software with a firewall for users that do not have extra cash to spare for the same. Comodo Firewall isn’t like your typical freeware that comes with its set of bloatware, advertisements, and unnecessary features. instead, the software works well in safeguarding your system against attacks and checks all the incoming and outgoing traffic. Doing so is a burden on the system resources with most antivirus software but not the Comodo Firewall. It is fairly lightweight and does not eat up your RAM like Avast.

Comodo Firewall also comes with a sandboxing feature. It is titled Virtual Kiosk and lets you run new programs without compromising your system security. It is an efficient way to test a new program before allowing it access on the firewall. Comodo Firewall also has a secure browsing feature that may come ha day for your day-to-day browsing or specific tasks such as banking transactions, business meetings, etc.


  • Secure browser
  • Sandboxing feature


TinyWall is also a lightweight program like the webroot AntiVirus and has a different approach to the firewall system. It comes with the usual set of antivirus features such as blocking applications and preventing them from requesting undue permissions. TinyWall works great but rather than blacklisting programs, TinyWall whitelists them. It is a reverse approach to firewall protection that can be very easy for the users.

Most firewall software has one annoying similarity which is displaying a pop-up every time an application wants to access the internet. TinyWall doesn’t do that. On the contrary, it asks its users to manually whitelist the programs and applications that they need to be connected to the internet. Rest everything is blocked from accessing the internet and users don’t have to deal with annoying popups anymore.


  • Whitelist applications
  • Active network monitoring


Windows 10 has a firewall by default but that has shown its limitations in the early stages. We recommend you to go for the Bitdefender or the Panda Dome Essential as the best free firewall software for stellar protection against nefarious applications.

If you think that a pictorial representation will help you learn more about the nature of the programs, Galsswire is your best bet for the best free firewall software. Lastly, we recommend both TinyWall and webroot AntiVirus for users that want a lightweight program that has firewall features and also provides decent privacy protection.

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