OPNsense vs Zyxel Unified Security Gateway comparison

OPNsense and Zyxel are both solutions in the Firewalls category. Additionally, 97% of OPNsense users are willing to recommend the solution, compared to 66% of Zyxel users who would recommend it.

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Executive Summary

We performed a comparison between OPNsense and Zyxel Unified Security Gateway based on real PeerSpot user reviews.

Find out in this report how the two Firewalls solutions compare in terms of features, pricing, service and support, easy of deployment, and ROI.

To learn more, read our detailed OPNsense vs. Zyxel Unified Security Gateway Report (Updated: April 2025).

Buyer's Guide

OPNsense vs. Zyxel Unified Security Gateway

April 2025

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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

Featured Reviews

EhabAli

Sr. Cybersecurity Solutions Architect at BMB

Efficient, user-friendly, and affordable

In the past, NSS Labs was utilized to test files and verify the numbers and datasheets. It would be beneficial to have an organization or testing lab that can verify the numbers in our datasheets since changes are frequently made, which can be inconvenient for review. For instance, when comparing different competitors such as Forcepoint, Palo Alto, and Check Point, the throughput or numbers in the datasheet may be lower than the actual numbers. Conversely, Fortinet typically reports very high numbers, but they cannot be replicated in the real world. Therefore, it would be advantageous for them to partner with a neutral testing organization such as NSS Labs to validate these numbers, thus providing more credibility and comfort to everyone regarding the accuracy of the datasheets. For the migration, everyone has a firewall in use and I am selling Fortinet. Typically, I am replacing another firewall. Previously, there was a tool available to convert configurations from one firewall, such as Palo Alto, to Fortinet, but this tool is no longer free. If it could be made free again, it would be very beneficial. This tool shows a lot of promise and is very good. Making it free would help many companies deliver their products in a more efficient and integrated way. It would also be more valuable to include the tool with the firewall package or license instead of having to pay extra for it. Paying extra puts more pressure on small companies to deliver the firewall and complete the configuration, especially if they have hundreds or thousands of policies. It's very painful to move through these policies line by line. The stability has room for improvement. When it comes to Secure SD-WAN, everything is fine. They are going the right way. SD-WAN is very promising. They can provide the SD-WAN solution separately, but they will not take this approach because even the smallest firewall can support the features, so there is no need to have a separate service or appliance. They are following the right steps, and there is nothing to be improved. Feature-wise, I'm really satisfied with the new release, and the features they have added. For now, it's fine.

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Eddy Ramirez

IT Security Director at a financial services firm with 1,001-5,000 employees

Good interface and firewall capabilities and overall easy to use

The security has improved as we can isolate the network. We can do attrition prevention via a tool that comes with the solution. We can have a VPN solution in place for those that work from home, outside the network, in a secure manner. We also like that it offers good authentication. It offers radius-based authentication, which has been useful for the company. The main platform is under the Open VPN firewall. The solution has high availability. When we have different ISPs, we can actually load balance those links or actually put some priority or even classify the traffic that might go into one ISP or another.

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Alexander Azikov

It Manager at Diamond Braces

A robust appliance that is reasonably priced and straightforward to set up

Although manageable, the user interface is a little bit slow and could be improved. There are two user interface options available, namely the basic and the advanced. The basic UI is not very good and doesn't have a lot of features, although it is fast. The advanced UI allows me to do whatever I want, but this is where the issue of speed exists. At one of our sites, the CPU utilization was very high, and for no reason. Technical support needs to be more responsive to requests.

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Quotes from Members

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

Pros

"It can expand easily."

"The most valuable features are simplicity, management, and that it's constantly evolving."

"The features that prevent internet connections, the filtering are the most valuable because we did not have any internet protection before."

"FortiGate is more feature-rich and has a broader range of hardware. T"

"SSL-VPN is very useful for us and has been very reliable."

"The most valuable features of Fortinet FortiGate are the ability to work in proxy mode, which other solutions, such as Palo Alto cannot. There are some features that are better that come at no extra license or subscriptions cost, such as basic SD-WAN. The DLT is useful, other solutions have the same feature too, such as Palo Alto."

"The user interface (UI) is very, very good."

"Its administrative panel is very intuitive and simple. It is simpler than the other solutions that we had. As an administrator, we are always looking for the easiest solution to manage network policies. We are able to filter everything on our network and also use the VPN feature, which is important these days when people are working remotely during COVID."

More Fortinet FortiGate pros

"URL blocking, Wireguard, Tail Scale, Engine Blocker, and VPN are the most valuable features for me."

"The tool's integration is more like a button press."

"We have found pretty much all the features of the solution to be valuable."

"It's more secure and more reliable."

"I mostly rely on the solution's network intrusion detection and prevention system, along with other systems, CMs, and log management."

"The DNS-level filtering is impressive for thwarting time scanners."

"The interface and the dashboard are the most valuable features of this solution."

"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."

More OPNsense pros

"The solution can scale well."

"The most valuable features of the solution stem from web filtering, malware protection, and antivirus."

"This is a capable appliance and the standard features work well for us."

Cons

"I would prefer to have more detailed logs within the FortiGate products themselves rather than relying on a separate tool."

"We would like to see a better training platform implemented."

"I feel that the reporting needs to be improved."

"The user interface could be improved to make it less confusing and easier to set up."

"In my opinion, Fortinet FortiGate could be improved by making the appliance smaller than what we have here, as it is pretty big."

"Regarding challenges, customers initially faced issues like internet dropping, but after firmware upgrades, everything worked well."

"The solution could be more secure and stable."

"Palo Alto has a feature called WildFire Analysis that is unavailable in FortiGate. WildFire is better than a sandbox because it can address zero-day threats and vulnerabilities. It can immediately identify zero-day threats from the cloud."

More Fortinet FortiGate cons

"There are issues with stability and reliability."

"The interface isn't so friendly user. But we have some technicians here who are quite confident with this tool. OPNSense could maybe add sets of rules so it's simpler to manage different groups with particular needs."

"The reporting part could be better."

"While they do have paid options that actually gives better features, for most of the clients, if they tend to take a paid option will instead opt for Fortinet."

"An area for improvement in OPNsense is the hardware, which needs to be updated more frequently. DNS blocking is another good feature I want to be added to the solution. pfSense has a peer-blocking feature that I also want to see in OPNsense."

"I would like to see better SD-WAN performance."

"OPNsense struggles to handle large volumes of voice traffic, indicating scalability issues in that specific use case."

"The solution would not be suitable for anything large-scale."

More OPNsense cons

"The product has some scalability and data management issues where improvements are required."

"Sometimes it reboots when you least expect it, and that's the main issue."

"Although manageable, the user interface is a little bit slow and could be improved."

Pricing and Cost Advice

"The pricing is perfect."

"The licensing costs are very low."

"This is not a cheap solution but it isn't expensive, either. It's a good solution for the right price."

"The price is okay."

"The price is highly competitive when compared to other brands that offer similar functionality."

"The license for Fortinet FortiGate is affordable in my country."

"It is too expensive for us. My organization is very small, and we have a total of ten users. We have three internal users and seven external users. The FortiGate 100D series is too expensive for renewing the licenses."

"Fortinet's pricing is more straightforward than other solutions. If Fortinet doesn't stick out when you're searching for a solution, you are a glutton for punishment. You only need to know two things when purchasing a Fortinet solution: your total bandwidth and bandwidth at the site. You need to estimate the future bandwidth with other solutions if your customer plans to upgrade."

More Fortinet FortiGate pricing and cost advice

"As an appliance, it's in the medium price range."

"The price of OPNsense is good."

"The solution is not expensive."

"OPNsense is an open-source solution and it is free to use."

"It costs about $1000."

"There are no licensing costs for OPNsence."

"I'm using the free version of OPNsense. I didn't check the pricing for the solution because I still need to test it before getting the approval to purchase OPNsense, and it isn't easy to get approval from the higher-ups."

"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."

More OPNsense pricing and cost advice

"This gateway is pretty cheap."

"The price of Zyxel Unified Security Gateway is good compared to other similar products in the market."

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Top Industries

By visitors reading reviews

Educational Organization

20%

Computer Software Company

14%

Comms Service Provider

Manufacturing Company

Computer Software Company

16%

Comms Service Provider

13%

Government

Educational Organization

Computer Software Company

18%

Comms Service Provider

18%

Retailer

Real Estate/Law Firm

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

No data available

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...

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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...

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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 ...

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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...

See all answers

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.

See all answers

What is your experience regarding pricing and costs for OPNsense?

I consider the pricing of OPNsense to be high when compared with other market products. However, as a free firewall p...

See all answers

What do you like most about Zyxel Unified Security Gateway?

The most valuable features of the solution stem from web filtering, malware protection, and antivirus.

See all answers

What is your experience regarding pricing and costs for Zyxel Unified Security Gateway?

The price of Zyxel Unified Security Gateway is good compared to other similar products in the market.

See all answers

What needs improvement with Zyxel Unified Security Gateway?

If you have very secure data, Zyxel Unified Security Gateway will not be very useful. My company doesn't have to deal...

See all answers

Comparisons

Sophos XG vs Fortinet FortiGate

Compared 22% of the time

Netgate pfSense vs Fortinet FortiGate

Compared 13% of the time

Cisco Secure Firewall vs Fortinet FortiGate

Compared 11% of the time

WatchGuard Firebox vs Fortinet FortiGate

Compared 5% of the time

Check Point NGFW vs Fortinet FortiGate

Compared 3% of the time

More Fortinet FortiGate Competitors

Netgate pfSense vs OPNsense

Compared 38% of the time

IPFire vs OPNsense

Compared 13% of the time

Sophos XG vs OPNsense

Compared 8% of the time

Untangle NG Firewall vs OPNsense

Compared 4% of the time

More OPNsense Competitors

Netgate pfSense vs Zyxel Unified Security Gateway

Compared 16% of the time

Fortinet FortiGate-VM vs Zyxel Unified Security Gateway

Compared 7% of the time

WatchGuard Firebox vs Zyxel Unified Security Gateway

Compared 7% of the time

Sophos XG vs Zyxel Unified Security Gateway

Compared 5% of the time

Sophos XGS vs Zyxel Unified Security Gateway

Compared 5% of the time

More Zyxel Unified Security Gateway Competitors

Product Reports

Buyer's Guide

Fortinet FortiGate

April 2025

Download Fortinet FortiGate product report

Buyer's Guide

OPNsense

April 2025

Download OPNsense product report

Buyer's Guide

Unified Threat Management (UTM)

March 2025

Download Zyxel Unified Security Gateway product report

Also Known As

FortiGate 60b, FortiGate 60c, FortiGate 80c, FortiGate 50b, FortiGate 200b, FortiGate 110c, FortiGate, Fortinet Firewall

No data available

Overview

Fortinet FortiGate offers comprehensive network security and firewall protection across multiple locations. It effectively manages data traffic and secures environments with features like VPN, intrusion prevention, and UTM controls.

Organizations rely on Fortinet FortiGate for its robust integration with advanced security policies, ensuring significant protection for enterprises, cloud environments, and educational sectors. It facilitates network segmentation, application-level security, and authentication management, securing communication within and between locations such as branches and data centers. Its efficient SD-WAN and UTM features enable streamlined data management and enhanced threat protection capabilities. Users appreciate its centralized management, facilitating seamless operations across diverse environments.

What are the key features of Fortinet FortiGate?

VPN Capabilities: Ensure secure remote access for users and seamless site-to-site connections.
Intrusion Prevention System (IPS): Detect and prevent security threats and vulnerabilities.
Advanced Firewall: Offers robust firewalling with application control and web filtering.
SD-WAN: Optimizes application performance and enhances bandwidth management.
SSL VPN: Provides reliable and secure access for remote workers.

What benefits should users expect from Fortinet FortiGate?

High-performance Security: Delivers effective threat mitigation with high availability.
Centralized Management: Simplifies network operations with cloud-based management tools.
Detailed Analytics: Provides comprehensive insights into network activity and security threats.
Load Balancing: Ensures optimal resource distribution and traffic management.

Fortinet FortiGate is crucial in sectors like education, offering robust networks for secure data flow between campuses and facilitating remote learning. In enterprise environments, it allows efficient management of application traffic and security across multiple branches, while in the cloud, it seamlessly integrates with diverse platforms to enhance security infrastructure.

Fortinet

OPNsense is widely used for firewall functionalities, intrusion detection, VPN and IPSec, content filtering, securing network traffic, and remote access. It protects internal networks and manages servers securely, suitable for small to medium-sized businesses.

OPNsense is a comprehensive firewall solution leveraging open-source technology. It integrates with third-party modules like WireGuard and CrowdSec, enhancing its security capabilities. Offering on-premises and cloud deployment, it features an intuitive graphical interface, advanced reporting, VPN functionality, IDS/IPS features, and high scalability. Users find it ideal for small businesses and home networks due to its stability and ease of use. Frequent updates and an active community support its continuous improvement. However, it needs advancements in VPN selection, scalability, and technical documentation. Enhanced high availability, threat intelligence, and integration with virtualization platforms are required. User feedback suggests improvements in connectivity, alerting, traffic monitoring, and antivirus protection.

What are the key features of OPNsense?

Strong Firewall: Robust firewall capabilities for securing network traffic.
Intrusion Detection and Prevention: Effective IDS/IPS for threat mitigation.
VPN Functionality: Comprehensive VPN support including WireGuard.
Content Filtering: DNS-level filtering for enhanced security.
Advanced Reporting: In-depth traffic analysis and reporting features.
High Scalability: Supports growing network demands.
Integration Capabilities: Works with third-party modules like CrowdSec.
Intuitive GUI: User-friendly graphical interface enhances usability.

What benefits should users look for in OPNsense reviews?

Security: High level of protection for internal networks.
Manageability: Easy management of servers and network traffic.
Cost-Effective: Open-source nature reduces costs.
Reliability: Stable performance suitable for small and medium-sized businesses.
Community Support: Active community and frequent updates.

OPNsense is implemented across various industries to secure network infrastructure and ensure reliable connectivity. In fintech, it safeguards sensitive financial data while maintaining compliance. Educational institutions deploy it to protect student information and enable secure remote learning environments. Healthcare organizations use it to secure patient data and comply with HIPAA regulations. By integrating with tools like WireGuard and CrowdSec, businesses enhance their cybersecurity posture and streamline network management, making OPNsense a versatile choice for diverse operational needs.

OPNsense

ZyWALL USG Series delivers high-access quality to help businesses satisfy the demand for always-online communications. For internal deployments, the ZyWALL USG Series provides active-passive High-Availability (HA) service to support device or connection failover.

With Device HA Pro service, the ZyWALL USG Series also supports instant failover, so connections are always maintained when a failover event occurs. For external deployments, the ZyWALL USG Series features multi- WAN load balancing/failover and a comprehensive mobile broadband USB modem support list for WAN backup operations. The ZyWALL USG Series also supports IPSec load balancing and failover, providing additional resilience for mission-critical VPN failover with VTI Interface deployments.

ZyWALL USG110/210/310 thoroughly protects networks with industry-leading firewall, Anti-Malware/ Virus, Anti-Spam, Content Filtering, IDP, and Application Patrol functionality. Regulate unauthorized use of Web applications over your network, such as Facebook, Google apps, and Netflix, among others. Zyxel security measures are enhanced with SSL Inspection, blocking threats hidden in SSL-encrypted connections while facilitating deeper policy enforcement. Furthermore, newly improved Content Filtering 2.0 enhances HTTPS Domain Filter, Browser SafeSearch, and Geo IP Blocking for an array of security enhancements to ensure clean Web connections.

Zyxel

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.

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Buyer's Guide

OPNsense vs. Zyxel Unified Security Gateway

April 2025

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