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9 Best Free Firewall Software Tools in 2019

August 22, 2019

Firewalls are the OG cybersecurity tools, dating back nearly three decades.

Today, it’s a whole new world. We are under constant threat of hacking, identity theft and viruses from all directions, as computers often exist in everything from our sunglasses to our refrigerators. And to greet the demand, security software grows more advanced by the hour, thanks to the tireless efforts of global developers.

Amidst the chaos, there is still a place for firewall software, an oldie but a goodie.

Your company may spend thousands on security measures in the next few years. Frankly, it’s a smart move for protecting your data, your devices, and your employees’ privacy. The looming possibility of cybercrime is the darkest of underbellies for tech-forward businesses, even those who just use the basics like smartphones and internet browsers.

What kind of threats are we talking about here? Read about 4 common cyberattacks and how to prevent them on our Learning Hub.

Keeping your team educated, and your systems protected with modern tools, is simply part of the deal for living in these times. Them’s the facts, Max.

But before getting too advanced and shelling out the big bucks, you can establish a sturdy foundation with a firewall to limit access and the flow of files on your IT networks. Thanks to some very thoughtful vendors, you can even get set up with little to no financial commitment. Using G2 data, we’ve thrown together some free firewall applications you can consider for your business or even your home network.

See the Highest-Rated Firewall Software, Free →

These products alone have nearly 70 validated user reviews on G2 as of May 28, 2019, and only represent a portion of the 50 firewall software tools listed on our platform.

For each product we provide:

  • An overview
  • Highlighted features
  • Free and paid options details

The list we’ve outlined here includes any firewall software with an available free offering. Some products provide limited free options while others are completely free without restrictions. And who’s going to pay for the wall?

Nobody. It’s free, remember?

It should be noted that this list does not include products that are only free on a temporary basis such as limited trial versions for new users. These solutions may only support one user or one project and scaling often requires full investment. We also highlight the paid options so there are no surprises in case you test a free firewall solution, like it, and want to upgrade.

The best free firewall software in 2019

Let’s get you and your team walled up. Below are the zero-cost firewalls that are worth considering for your business.

1. GlassWire

Product name: GlassWire Firewall
G2 star rating: 4.5 out of 5.0


GlassWire is a network monitor and security solution with a built-in firewall. It is available for download on Windows computers and Android devices. Users can view past and present network activity and create profiles for different device scenarios. As of publication, GlassWire is a High Performer in the Firewall category and one of the best-reviewed products in the space.

Free option

  • GlassWire’s free offering includes the majority of features, with a limited graph history and protection for one PC.

Paid option

  • GlassWire Basic offers additional security features and allows for one PC, three remote connections and a six-month graph history. An annual subscription costs $29/year.
  • GlassWire Pro allows for 3 PCs, 10 remote connections and a one-year graph history. An annual subscription costs $50/year.
  • GlassWire Elite allows for 10 PCs with unlimited remote connections and graph history. An annual subscription costs $75/year.


  • Visual network monitoring
  • Internet security
  • Discreet alerts
  • Bandwidth usage monitor
  • Wi-Fi evil twin detector
GlassWire screenshot

Screenshot courtesy of dgit

Read GlassWire user reviews, FREE →

2. Comodo Firewall

Product name: Comodo Firewall
G2 star rating: 4.0 out of 5.0


Comodo is a popular security product and a Leader in the Firewall category on G2. It helps verify all inbound and outbound activity on the network, stealthing ports against hackers and blocking malicious software from corrupting and distributing data. Comodo allows users to determine which applications are allowed to connect to the web, with immediate alerts in the event of suspicious activity.

Free option

  • Comodo’s free offering is a basic firewall solution that detects known viruses and threats. It is compatible with Windows 7, 8 and 10.

Paid option

  • The Comodo Internet Security Pro plan offers live support and features such as anti-spam and spyware scanning, with protection against not-yet-identified incoming threats. It is available for $39.99/year with protection for up to three PCs.


  • Intelligent antivirus and anti-malware
  • Home network security
  • Browser cleanup
  • Auto Sandbox Technology
  • Game mode
  • 400 MB of available hard disk space
Comodo Firewall screenshot

Screenshot courtesy of Comodo

Read Comodo user reviews, FREE →

3. Cloudbric

Product name: Cloudbric
G2 star rating: 4.3 out of 5.0


Cloudbric is a web application firewall (WAF) software that helps identify and block attempted attacks on websites. It features logic-based analysis detection powered by Penta Security Systems. The platform offers features specially designed to block malicious activity aimed at the leakage of personal information. Users also have access to free SSL certificates that encrypt communications between visitors and the web server.

Free option

  • Cloudbric’s free offering includes all features with a monthly traffic limit of 4 GB.

Paid option

  • Cloudbric pricing is based on the traffic allowance. The plans listed on the site are $29/month for 10 GB, $69/month for 40 GB and $149/month for 100 GB, with custom pricing available for enterprise customers.


  • Real-time dashboard
  • Monthly reports
  • DDoS protection
  • SSL support
  • Custom SSL
  • OWASP core rule set
  • Login protection
  • PCI certified
  • Login-based WAD

Cloudbric screenshot

Screenshot courtesy of Cloudbric

Is Cloudbric right for you?  Read Reviews Now, FREE →

4. Untangle

Product name: Untangle NG Firewall
G2 star rating: 4.5 out of 5.0


Untangle offers a library of security tools, collectively known as Untangle NG Firewall. The individual apps work together as part of a unified network security platform or as standalone solutions. There are four different deployment options for the Untangle family of technology: as software installed on the user’s hardware, on a preloaded appliance, as a virtual machine, or in the public cloud.

Free option

  • Untangle’s firewall solution is available as a standalone app, free for unlimited use.

Paid option

  • Untangle NG Firewall Complete, featuring every app in the Untangle library, is available starting at $25/month. You can also purchase individual apps on the Untangle website.


  • Open source and free under the GNU General Public License (GPL)
  • Easily blocks sessions based on simple rules
  • Rules can be based on a variety of attributes
Untangle screenshot

Screenshot courtesy of Untangle

Browse Untangle user reviews →

5. IPCop

Product name: IPCop Firewall
G2 star rating: 3.8 out of 5.0


The development team behind IPCop describes the software as a Linux firewall distribution geared toward home and small office/home office (SOHO) users. It is an open-source technology. Rather than asking for donations, the IPCop team asks users to help contribute code, features or patches to keep the software evolving and protecting its present and future user base.

Free option

  • IPCop Firewall is a completely free and open-source solution.

Paid option

  • There are no mentions of a paid upgrade on the IPCop website.


  • Open source
  • Linux-based
  • Add-ons available on SourceForge
IPCop screenshot

Screenshot courtesy of SourceForge

Read IPCop user reviews, FREE →

6. ZoneAlarm Free Firewall

Product name: Zonealarm Free Firewall
G2 star rating: N/A


ZoneAlarm by Check Point is a family of software for PC protection, mobile security and business network security. ZoneAlarm Free Firewall is a stripped-down version of the vendor’s Pro Firewall solution, which is currently a Leader in the Mobile Data Security Software category on G2. Both products assist with blocking unwanted traffic and protecting data, with the Free Firewall platform more focused around personal use cases. According to the ZoneAlarm website, these offerings are collectively protecting more than 100 million users worldwide.

Free option

  • ZoneAlarm offers free firewall and free antivirus applications with limited feature sets that are compatible with Windows 7, 8 and 10.

Paid option

  • ZoneAlarm Pro Firewall, a separate solution, provides two-way protection with features such as anti-phishing and true stealth mode. It is priced based on the number of PCs and the subscription length, starting at $14.95 for one year and one PC.
  • ZoneAlarm also has Anti-Ransomware and Extreme Security products for sale, with details provided on the ZoneAlarm website.


  • Monitor programs for suspicious behavior
  • Identity protection services
  • Public network protection
  • Wireless network protection
  • Real-time security updates
ZoneAlarm Free Firewall dashboard

Screenshot courtesy of SnapFiles

Would you recommend ZoneAlarm Free Firewall to a friend? Write a Review →

7. Evorim FreeFirewall

Product name: Evorim FreeFirewall
G2 star rating: N/A


Evorim’s FreeFirewall allows users complete control over the programs or devices that can access their internet network. The software is designed to alert administrators when unverified applications attempt to access the internet. It also provides assistance with blocking web tracking and telemetry data from external vendors. FreeFirewall is compatible with Windows 7, 8 and 10, with Linux and MacOS versions in the development stages.

Free option

  • The fully featured version of FreeFirewall is completely free to download and use.

Paid option

  • There is no mention of paid upgrades on the FreeFirewall website.


  • Currently works on Windows 7, 8 and 10
  • Protection on the internet
  • Privacy
  • Monitoring mode
Evorim FreeFirewall screenshot

Screenshot courtesy of Evorim

Share your Evorim FreeFirewall Insights:  Write a Review →

8. TinyWall

Product name: TinyWall
G2 star rating: N/A


TinyWall is a “free, lightweight and non-intrusive firewall” built to supplement the Windows firewall and add increased security for these users. The software actively blocks hundreds of viruses, worms and trojans, without required knowledge of ports, protocols or application details. TinyWall does not require drivers or kernel components to be installed, helping to keep the corresponding systems running smoothly.

Free option

  • TinyWall is 100% free with no ads or artificial limitations. Donations are accepted to support the platform’s continued development.

Paid option

  • TinyWall does not offer paid upgrades according to the vendor website.


  • Automatic learning mode
  • Port and domain blocklists
  • Hosts file protection
  • Full IPv6 support
TinyWall screenshot

Screenshot courtesy of Softpedia

Review TinyWall →

9. Simplewall

Product name: Simplewall
G2 star rating: N/A


Simplewall is billed as a unified threat management (UTM) solution with firewall security and content filtering capabilities among other features. It is designed for end-to-end protection of small business networks, with a detailed dashboard of network activity. It includes features such as bandwidth optimization and antivirus protection, with a standardized block list for unpermitted URLs and IPs.

Free option

  • Simplewall is a completely free software with no user limitation.

Paid option

  • Simplewall offers premium support for $35/hour with a minimum commitment of three hours for $105.


  • Port map
  • IP alias
  • Content filtering
  • Dashboard and reports
  • Integrated OpenVPN module
  • Robust network protection
  • Bandwidth management
  • Standardized block lists
Simplewall screenshot

Screenshot courtesy of Softpedia

Would you recommend Simplewall to a friend? Write a Review →

Choosing a firewall software for your business

Protect yourselves, friends. If you and your team have been operating without a safety net, consider one of these free solutions that are easy to get up and running. There are dozens more firewall solutions available with small-to-moderate price tags attached, and you may decide they are worth the investment to keep your networks safe from unwanted visitors. Do the research and remember that a little effort now can prevent a boatload of headaches later.

While you’re in safety prep mode, read up on website security and the red flags of an unsafe website. You can also peruse our list of free VPN software, an added security measure for masking your IP address from hackers both in your office and out in the world. Every little bit helps in this cyber-crazy age.

Find the best VPN software on the market Explore Now, FREE →

Take some extra time to safeguard your startup by reading these tools and tips for keeping your small business secure, and consider reaching out to a cybersecurity consulting provider for a personalized roadmap of protection.

9 Best Free Firewall Software Tools in 2019 There’s no getting around the need for cybersecurity in 2019. These free firewall software tools are a solid starting point on your journey to complete protection.
Andrew Zangre Zangre is a former Senior Research Specialist who helped with spearheading G2's expansion into B2B Services. He studied journalism at the University of North Florida — which is still undefeated in football — and joined G2 in 2016 when there was only one other “Andrew.” He has enjoyed contributing to newspapers and online publications while pursuing music and comedy projects in his free time.

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