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OPNsense vs Zscaler Cloud Firewall comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Sep 16, 2024

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

Fortinet FortiGate
Sponsored
Ranking in Firewalls
1st
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
411
Ranking in other categories
Software Defined WAN (SD-WAN) Solutions (1st), WAN Edge (1st)
OPNsense
Ranking in Firewalls
3rd
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
43
Ranking in other categories
No ranking in other categories
Zscaler Cloud Firewall
Ranking in Firewalls
25th
Average Rating
8.2
Reviews Sentiment
8.0
Number of Reviews
18
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of September 2025, in the Firewalls category, the mindshare of Fortinet FortiGate is 20.1%, up from 18.4% compared to the previous year. The mindshare of OPNsense is 11.1%, down from 15.9% compared to the previous year. The mindshare of Zscaler Cloud Firewall is 0.4%, up from 0.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Firewalls Market Share Distribution
ProductMarket Share (%)
Fortinet FortiGate20.1%
OPNsense11.1%
Zscaler Cloud Firewall0.4%
Other68.4%
Firewalls
 

Featured Reviews

Vasu Gala - PeerSpot reviewer
A stable solution with an intuitive interface and quick customer service
I have been working with Fortinet FortiGate, WatchGuard, Sophos, and SonicWall. I'm not as comfortable with SonicWall because of their UI and limitations. I prefer Fortinet above all other options. When it comes to configuration, I am confident in my ability to handle various tasks, including creating policies such as firewall rules, web policies, and application policies. Additionally, I can configure VPNs and implement load balancing, among other tasks. Overall, I feel much more comfortable working with Fortinet. Fortinet has made significant improvements by integrating AI with firewalls for threat analysis and prevention. In the past 2-3 years, they have launched FortiSASE and SIEM, and they also provide SOC services. Both Palo Alto and Fortinet FortiGate are excellent. While Fortinet FortiGate comes at higher prices, the functionality and support justify the cost. They promptly resolve firmware issues and inform all support providers about configuration changes.
Moutaz Sheikh Alard - PeerSpot reviewer
Has helped simulate enterprise security setups and strengthens network segmentation practices
For my capstone, I use OPNsense for my project and its broader benefits for enterprise and cybersecurity context. OPNsense is an open source based firewall and routing platform. It offers enterprise-grade features such as intrusion detection and prevention system, VPN support, traffic shaping, and web filtering, all without license cost. This platform has a modular design, a clean web-based GUI, and frequent updates that prioritize security and usability. It competes with commercial firewalls such as Cisco ASA, FortiGate, and Palo Alto, but stands out because it's community-driven, cost-effective, and transparent. I find OPNsense's feature of acting as a central firewall and gateway most valuable, providing robust point segmentation between the internal network and DMZs in my capstone project, intrusion detection to monitor malicious traffic, VPN services for secure remote access, and logging and monitoring for compliance and auditing. This allows me to simulate a real-world enterprise environment on a smaller scale, demonstrating both security hardening and network efficiency. OPNsense impacts my projects and home network positively because its cost-effectiveness is perfect for lab and enterprise setup without expensive licensing. The flexibility, easy VLAN and DMZ configuration supports different zones such as web servers, mail servers, and log servers. The security-first design for IDS/IPS integration helps me showcase modern defense-in-depth strategies. The user-friendly management through the web GUI makes it possible to manage complex firewall rules clearly, which is critical when documenting and presenting a capstone. Scalability is also an advantage. Although my project is lab-based, OPNsense can scale into production deployments in SMBs and enterprise.
Vikram Srirama. - PeerSpot reviewer
A highly scalable solution that helps monitor and block undesired, non-standard traffic
Zscaler Cloud Firewall is a cloud-based solution. Zscaler Cloud Firewall is a good product. Since it's a SaaS product, most of the maintenance of devices is eliminated, and it is bundled with your secure web gateway. People should use Zscaler Cloud Firewall for their remote users or work-from-home users. Overall, I rate Zscaler Cloud Firewall a nine out of ten.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"What I like the most is the configuration and that it's simple, and straightforward to maintain."
"It's user-friendly and easy to operate."
"Fortinet FortiGate has many functions, and it is one of the best next-generation firewalls with an affordable cost than other vendors."
"It is pretty straightforward to manage and has robust capabilities. I appreciate that Fortinet FortiGate can be a central controller for other Fortinet products, such as switches and access points."
"The initial setup is very straightforward and easy, with wizards helping to configure the device efficiently."
"I like how we can achieve total integration."
"Overall, the pricing of the solution is very good. The product offers good value."
"Fortinet FortiGate has many valuable features, such as IDS, and intrusion detection. It has security features that are in part with the technologies that are available in the market."
"The system in general is quite flexible."
"We have been operating here in our lab for several months, and everything appears to be extremely stable."
"The VPN server feature is the most valuable. It is integrated with Radius and AAA for doing accounting and authentication. Insight view is also an important feature for me at this time. It allows me to assess our network traffic. I also like the firewall feature. The BSD kernel has a packet filter. It is one of the most solid frameworks for firewalls. Its user interface is one of the best interfaces I have used."
"The most valuable features in OPNsense are reporting and visibility."
"I have found the solution has some great features overall, such as guest access capabilities, dashboards, and ease of use. There is plenty of documentation and support and it has the plugins that I needed."
"The most valuable features are reporting, the Sensei plugin, and firewall capabilities."
"It's open source."
"OPNsense is easy to use and open source."
"The visibility and log availability offered are highly valued for troubleshooting purposes, and this is a key factor driving customer interest in the firewall module."
"Most of the features that Zscaler has to offer, we will deploy."
"It is a stable solution."
"I like the ease of deployment and its flexibility. We don't need to deal with license, quotes, procurement, delivery, and installation. Everything is software-based, and it's very easy to operate."
"Since it is really customizable, I can use it and avoid enabling access to the full network."
"If malicious traffic attacks our on-premises servers, then it gets blocked by Zscaler Cloud Firewall."
"The technical support from Zscaler was excellent."
"Includes advanced tech protection."
 

Cons

"I would suggest that Fortinet add sandboxing to their solution."
"FortiGate can only retain logs for 24 hours or 7 days. I'm not sure if it holds them for a longer period, such as for a month. It will be useful for assessing our strategy and monitoring our environment without investing in FortiGate Analyzer. It would be beneficial if Fortinet could enhance the FortiGate by providing more statistical and monitoring views for a longer timeframe, rather than requiring access to FortiGate Analyzer."
"I would like to see improvements made to the dashboard and UI, as well as to the reporting."
"It could use more templates for third-party site-to-site VPN setups other than FortiGate and Cisco."
"There are too many updates coming for VPN, and the VPN keeps disconnecting frequently, which I find problematic. It does what it's supposed to do, but I practically face reconnection issues with the VPN."
"Backup can be improved."
"There should be some open-source training or free training for decision makers, or some webinars should be available."
"It should provide better visibility over the network and more information in the form of reports for the end users. Its installation should also be easier."
"The documentation should be clearer because I faced some difficulties navigating many options."
"OPNsense could improve by making the configuration more web-based rather than shell or command-line-based."
"The support for OPNsense is good because we have documents available on the internet. The support could improve a little."
"I would like to see better SD-WAN performance."
"The interface of the solution is an area with shortcomings."
"The solution could be more secure."
"The IPS solution could be more reliable."
"You will need additional training before you can actually start to use it."
"Pricing is a challenge."
"If I can get rid of Jetscaler, I will use Twingate for sure."
"Apart from the issues associated with the product in areas like the DC performance issues and DC failover, Zscaler Cloud Firewall's IP should not have a proxy IP."
"The issue right now is probably that Zscaler is not providing web browser isolation. Another solution, Menlo, offers this. For one customer, we had to send traffic to Menlo to do the isolation for us. It was requested by the customer so that they could integrate any iframe. Zscaler needs to add this type of feature in their next release."
"Zscaler Cloud Firewall should have a better understanding of all dynamic cloud applications."
"The product could improve its integration with some legacy systems."
"They do not provide a few components that are fundamental to differentiate the products"
"I don't have the visibility of a control dashboard or a network management system."
 

Pricing and Cost Advice

"Fortinet FortiGate is reasonably priced."
"The price of Fortinet FortiGate when compared to other solutions is high. However, my knowledge of the price is from third parties and I am not sure how accurate it is. I typically work in the technical area of my organization."
"The price of Fortinet FortiGate is the lowest in the market."
"Licensing for Fortinet FortiGate is on a yearly basis. Pricing for it is a bit high. It could be cheaper."
"Fortinet Secure SD-WAN delivered the lowest total cost of ownership (TCO) per Mbps among all other vendors."
"Fortinet is the least expensive solution."
"Its price is good."
"Cost-wise, there is not much difference from Sophos, but feature-wise, we get more features."
"It is not an expensive product. Basically, I deployed it because it was the fastest solution to satisfy our needs in open source."
"OPNsense is open source software so at this time it is free for us to use."
"It is free."
"OPNsense is a well known open-source tool."
"I would rate the pricing a nine out of ten, especially considering the availability of a free community edition."
"It costs about $1000."
"Its pricing is unbeatable in comparison to other firewalls. You can have a small instance that could be €80 a month with the hardware underneath. Azure Firewall and FortiGate are out of the question at this price. If you are on a public cloud, you need the underlying infrastructure. Other than that, there is no additional cost. If you have it on-prem, you have to buy the server or the appliance. The hardware cost is replaced with the infrastructure cost in the cloud. You also have costs for the public IPs and underlying VMs, but that's not related to OPNsense. It would be the same for a FortiGate deployment on Azure. You need a FortiGate license, and you need the underlying infrastructure that scales up depending on your needs."
"It is a free solution, and when you compare it to alternatives like FortiGate, which is quite powerful but also costly, the value becomes evident."
"There are licensing costs, and I would not say that it's a cheap vendor."
"On a scale from one to ten, where one is cheap, and ten is expensive, I rate the solution's pricing an eight out of ten."
"The licensing is on a yearly basis. It is somewhere around 30 or 40 pounds per user for our organization."
"The product is a bit expensive compared to the solutions offered by its competitors, like Palo Alto. There is a need to make yearly payments towards the license in charges associated with the product."
"It is expensive for small businesses."
"There is an annual license required for the use of the Zscaler Cloud Firewall."
"It is not the most budget-friendly solution, but it's important to consider its overall value."
"It comes at a significantly reduced cost while ensuring control and effectiveness."
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Top Industries

By visitors reading reviews
Computer Software Company
15%
Comms Service Provider
9%
Manufacturing Company
8%
Financial Services Firm
6%
Computer Software Company
16%
Comms Service Provider
16%
University
6%
Educational Organization
6%
Computer Software Company
12%
Manufacturing Company
9%
Financial Services Firm
8%
Construction Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business261
Midsize Enterprise99
Large Enterprise143
By reviewers
Company SizeCount
Small Business30
Midsize Enterprise4
Large Enterprise8
By reviewers
Company SizeCount
Small Business4
Midsize Enterprise2
Large Enterprise12
 

Questions from the Community

Which is the better NGFW: Fortinet Fortigate or Cisco Firepower?
When you compare these firewalls you can identify them with different features, advantages, practices and usage a...
What is the biggest difference between Sophos XG and FortiGate?
From my experience regarding both the Sophos and FortiGate firewalls, I personally would rather use FortiGate. I know...
What are the biggest technical differences between Sophos UTM and Fortinet FortiGate?
As a solution, Sophos UTM offers a lot of functionality, it scales well, and the stability and performance are quite ...
What is the difference between PfSense and OPNsense?
Two of the most common and well recognized firewalls, PfSense and OPNsense both support site-to-site IPsec VPN and cl...
What do you like most about OPNsense?
What I like the most about OPNsense is that it offers an easy-to-use dashboard for device management and control.
What is your experience regarding pricing and costs for OPNsense?
The pricing is competitive when compared to vendors like Palo and FortiNet.
Which lesser known firewall product has the best chance at unseating the market leaders?
Netscope, Zscaler if they continue route they are on now. FIrewalls needs great deal of automation on each end, datac...
What do you like most about Zscaler Cloud Firewall?
The product’s firewall and VPN package are fantastic compared to any other solution.
What is your experience regarding pricing and costs for Zscaler Cloud Firewall?
Zscaler Cloud Firewall is quite expensive compared to competitors. However, it offered moderate value for money.
 

Also Known As

FortiGate 60b, FortiGate 60c, FortiGate 80c, FortiGate 50b, FortiGate 200b, FortiGate 110c, FortiGate, Fortinet Firewall
No data available
No data available
 

Overview

 

Sample Customers

Amazon Web Services, Microsoft, IBM, Cisco, Dell, HP, Oracle, Verizon, AT&T, T-Mobile, Sprint, Vodafone, Orange, BT Group, Telstra, Deutsche Telekom, Comcast, Time Warner Cable, CenturyLink, NTT Communications, Tata Communications, SoftBank, China Mobile, Singtel, Telus, Rogers Communications, Bell Canada, Telkom Indonesia, Telkom South Africa, Telmex, Telia Company, Telkom Kenya
1. Deciso B.V. 2. iXsystems, Inc.  3. EuroBSDCon  4. Netgate  5. Claranet  6. Voleatech  7. Open Systems AG  8. Securebit AG  9. Proxmox Server Solutions GmbH  10. AVM Computersysteme Vertriebs GmbH  Additional customers include: T-Systems International GmbH, Deutsche Telekom AG, Vodafone GmbH, 1&1 IONOS SE, OVHcloud, Hetzner Online GmbH, Strato AG, PlusServer GmbH, Host Europe GmbH, United Internet AG, 1&1 Versatel Deutschland GmbH, QSC AG, Bechtle AG, Cancom SE, Computacenter AG & Co. oHG, T-Systems Multimedia Solutions GmbH, Atos SE, Capgemini SE, Accenture plc, IBM Corporation, Hewlett Packard Enterprise Company, Cisco Systems, Inc.
Zenith Live, Azure, Carlsberg Group
Find out what your peers are saying about OPNsense vs. Zscaler Cloud Firewall and other solutions. Updated: September 2025.
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