KerioControl vs Zyxel Unified Security Gateway comparison

GFI and Zyxel are both solutions in the Unified Threat Management (UTM) category. GFI is ranked #8 with an average rating of 9.3, while Zyxel is ranked #12 with an average rating of 8.0. GFI holds a 4.0% mindshare in UTMU, compared to Zyxel’s 3.6% mindshare. Additionally, 88% of GFI users are willing to recommend the solution, compared to 50% of Zyxel users who would recommend it.

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Executive SummaryUpdated on Nov 7, 2024

KerioControl and Zyxel Unified Security Gateway are competing products in the network security solutions category. Zyxel Unified Security Gateway often has the upper hand due to its comprehensive feature set that justifies the investment.

Features: KerioControl is known for strong firewall capabilities, easy VPN setup, and effective traffic management. It prioritizes security through constant updates and supports a wide range of protocols. Zyxel Unified Security Gateway provides advanced threat protection, seamless infrastructure integration, and extensive reporting tools. Its feature set is more versatile and comprehensive.

Ease of Deployment and Customer Service: KerioControl offers a straightforward deployment process with excellent configuration tools and a well-regarded support team. Zyxel Unified Security Gateway is slightly more complex to set up but offers detailed documentation and reliable customer service.

Pricing and ROI: KerioControl's attractive pricing model balances cost and value, with strong ROI due to minimal initial costs and affordable ongoing fees. Zyxel Unified Security Gateway has a higher upfront cost, but its advanced features and long-term benefits offer greater ROI.

To learn more, read our detailed KerioControl vs. Zyxel Unified Security Gateway Report (Updated: June 2026).

Buyer's Guide

KerioControl vs. Zyxel Unified Security Gateway

June 2026

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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

Mindshare comparison

As of June 2026, in the Unified Threat Management (UTM) category, the mindshare of Fortinet FortiGate is 24.9%, down from 36.6% compared to the previous year. The mindshare of KerioControl is 4.0%, up from 3.5% compared to the previous year. The mindshare of Zyxel Unified Security Gateway is 3.6%, up from 3.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Unified Threat Management (UTM) Mindshare Distribution
Product	Mindshare (%)
Fortinet FortiGate	24.9%
KerioControl	4.0%
Zyxel Unified Security Gateway	3.6%
Other	67.5%

Unified Threat Management (UTM)

Featured Reviews

Joseph Koomson

IP Network Security Specialist at MTN Ghana

Process-Level CPU Visibility: Introduce detailed CPU-usage metrics per subsystem (e.g., IPS engine, logging) so administrators can quickly identify and address performance spikes.

Analytics with FortiAnalyzer. Being able to pull in logs not just from our FortiGates but from all our other firewalls and then get them in one view has been a game changer. Whether I’m building an executive dashboard or doing a deep dive forensics session, I get everything I need without navigating consoles.Straightforward Application Control. FortiGate spots and blocks unwanted apps (eq. like BitTorrent or streaming services) with accuracy. Segmentation with VDOMs. We’ve carved our data center into four logical ‘mini-firewalls’ enterprise, core, billing, and WAF—all on one box. Each has its own rules and logs, and any traffic between them still gets inspected. It’s like having multiple appliances without the extra hardware. Always-Up-to-Date Threat Feeds. Daily signature updates and AI-driven threat sensing mean we’re blocking the latest vulnerabilities almost as soon as they’re announced.

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Constantnos Achilleos

Product manger at Asbis Mediteranean

Leveraging geo-tagging and web filtering for enhanced network security

The solution is used for site-to-site VPN connections and it is valued for its cost efficiency and easy connectivity. It is especially beneficial for multi-site VPNs and is used in about fifteen different components KerioControl has provided a financial benefit as it allows purchasing one license…

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reviewer2399337

Sales and technical consultant at a manufacturing company with 10,001+ employees

User has benefited from stable performance and effective completion of security tasks

I use it mostly for VPN and for some firewall solutions When considering my main use case with VPN, I can say that I got the Zyxel Unified Security Gateway, and it works fine. However, we are thinking about using a different solution based on open source because Zyxel Unified Security Gateway…

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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

"I found the upgrades valuable."

"It's comprehensive and time-saving. It covers several areas regarding security."

"Centralized monitoring, policy management, and virtualized appliances allow us to take control over our public and private infrastructure."

"The benefits Fortinet FortiGate provides include easy connectivity, user-friendliness, scalability, and easy configuration management."

"This solution is very stable."

"The response from the technical support team has always been excellent."

"A strong point of FortiGate is the graphical interface is complete and easy to use."

"Fortinet FortiGate has many excellent functions and good security."

More Fortinet FortiGate pros

"The firewall and intrusion detection features are good. It has blocked certain things. We have a lot of blocked sites that the staff or anyone using it, the public, etc., can't go on. It works for that. I get quite a few messages every now and again, saying that a virus has been detected and I can go in and block the user who's causing the problem."

"We use Kerio Control for controlling access to the web, and to protect the inside of the network."

"I love the VPN that we set up. A few of us have it on our computers so that if we leave, we can still access the stores. And we can work from home if needed. When I sign into that Kerio VPN, it links me like I'm sitting in the store. It puts me in our secure network so that I can sign on to each individual store and I can run numbers... If I have to work from home, it's so much faster than the way we used to do it."

"Setup is simple. The Kerio interface is very intuitive."

"Its support is very good, and it is stable product."

"Kerio Control can be scaled easily."

"Navigation through options and configure them is just two mouse clicks away, with lots of information available without the need of an external tool."

"I use Kerio Control for user statistics, intrusion detection and prevention (IPS), web filtering, etc."

More KerioControl pros

"The cost is very low."

"The Zyxel Unified Security Gateway solution is stable and does its job effectively."

"The solution can scale well."

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

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

Cons

"The solution could be improved by addressing limited local reporting. It requires obtaining the FortiAnalyzer for proper visibility because you can't do much from a reporting perspective with just the firewall alone."

"Overall, the integration could be better."

"In their datasheet, they put the throughput as huge, but once you enable all the features of the box, the performance is impacted dramatically."

"One of the most important areas for improvement for Fortinet FortiGate is the limited resources for tests. I was limited to a few interfaces for one month, and it would be great if Fortinet could improve these features in their test versions."

"It's one of the more expensive brands."

"They should make the rule sets more understandable for the end user. When you're trying to explain to somebody how a computer network is secured, sometimes it's difficult for an end user or customer to understand. If there was a way to make the terminology more accessible to the end user, the set up could be easier. They should translate the technical jargon to an easily relatable and understandable conversation for the end user, the customer, that would be brilliant. Particularly in an environment where the IT structure is audited regularly, there's always pressure from the auditor to up the standards and up the security and you get your USCERT's that come out and there's a warning about this and the customer will want to lock out so much and when you apply it they run into issue where they can't search the internet or print to their remote office. Of course they can't print to your remote office, they just locked it up. They should make the language more understandable for the customer. If there's a product out there that made the jargon understandable to John Q. Public, I would buy that."

"Like any hardware, it has finite scalability restrictions."

"The solution is very expensive."

More Fortinet FortiGate cons

"The solution can be improved to create the capability for larger bandwidths that support our business needs."

"My experience with the solutions technical support is fine but they could be faster in responding."

"There were certain things I didn't know about it, but I've always been able to just contact our IT company. They've been able to walk me through certain things. It was quite a monumental task to set up a public site. Support really had to help me with setting up the VLANs and walk me through it. It was not possible for me to figure that out on my own, but that's what they're here for. That could have been a little bit easier laid out."

"I would like it if the interface section had multiple failovers. Although I do have three connections, just in case our physical cables get disconnected, I can only set up one failover as a backup. So, if for some reason our fiber and our AFM went down together, I would have to have it search for our 4G modem. I'd love to have extra backups running."

"We'd like to have more integrations Kerio Operator."

"The antivirus seemed to be a bit laggy on the connection so I disconnected that. It's definitely good. The only issue we've had with any sort of cyber attack seemed to be coming from a couple of distinct locations, people trying to get into known ports on remote desktops and stuff like that. The fact that we can block all that traffic is just great. It simplifies it."

"The solution's hardware is not that great and could use more improvement. However, the VM software and the virtualized KerioControl itself are pretty good. The software is good; it's just the hardware that needs improvement."

"Sometimes you get a few challenges joining to a domain."

More KerioControl cons

"I have never seen it in any company that I've worked with before, and I would advise other companies not to buy it."

"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. The advanced UI allows me to do whatever I want, but this is where the issue of speed exists."

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

"The integration capability is quite challenging. The system is very complicated, and many features are hidden."

Pricing and Cost Advice

"I rate the price of Fortinet FortiGate SWG a seven and a half out of ten since it is not a cheap solution, though I feel it is a good product for the money one pays."

"The licensing costs are very low."

"Work through partners for the best pricing."

"It's not the cheapest, but it's value for money. Given everything we've got out of it: the DMZ port, the VPN, and the high availability, it's a pretty reasonable price."

"FortiGate SWG is a cost-effective solution well-suited for organisations of all sizes."

"The price could be lower."

"Fortinet FortiGate is cheaper than Palo Alto. It is about 20% cheaper."

"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

"It's too expensive. The license, in the last year or so, has gone up by over a £100. We're almost being out-priced by the annual license at the minute."

"On the low-end device that I use, it has unlimited IP addresses. So, they have a subscription model where, on the higher models, you pay X dollars for 10 IP addresses. Then, if you want any more, you have to pay more on the model. On the low-end model, it has unlimited IP addresses, because if you have too many users, the thing will just slow you down and stop working. At some point, you need to say, "Okay, I've grown to a point where performance is impacted. I need to get some bigger hardware." If I get to that stage, I will possibly look at using one of the virtual appliances and putting it on some bigger hardware."

"Pricing is good, but the licensing took a lot of time."

"The price is inexpensive."

"I think it is a bit on the pricey side, but it's okay. I've got 50 licenses which I think is $250 a year or something like that."

"It's pretty expensive in licensing costs, especially if you use the product longer than one or two years. The licensing costs are still high, which I don't think is reasonable for a product like this."

"It gives us a lot. It does prove to be a very robust product for the cost."

"Its licensing is yearly. You renew every year. Its price is all-inclusive."

More KerioControl 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

Comms Service Provider

10%

Computer Software Company

Manufacturing Company

Financial Services Firm

Computer Software Company

12%

Comms Service Provider

11%

Construction Company

11%

Financial Services Firm

Comms Service Provider

19%

Outsourcing Company

Financial Services Firm

Computer Software Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	369
Midsize Enterprise	139
Large Enterprise	195

By reviewers
Company Size	Count
Small Business	44
Midsize Enterprise	9
Large Enterprise	3

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 your experience regarding pricing and costs for KerioControl?

KerioControl offers good pricing as one license covers all features needed without extra payment. The price for the p...

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What needs improvement with KerioControl?

Regarding KerioControl's application awareness and control feature, I have not used it much.

See all answers

What is your primary use case for KerioControl?

With KerioControl, we usually use them for site-to-site VPNs for most of our clients. With multiple offices, we use K...

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

I cannot definitively comment on whether Zyxel Unified Security Gateway is an affordable product as I haven't done co...

See all answers

What needs improvement with Zyxel Unified Security Gateway?

The integration capability is quite challenging. The system is very complicated, and many features are hidden. I'm lo...

See all answers

What is your primary use case for Zyxel Unified Security Gateway?

I use it mostly for VPN and for some firewall solutions. When considering my main use case with VPN, I can say that I...

See all answers

Comparisons

Sophos Firewall vs Fortinet FortiGate

Compared 16% of the time

Cisco Secure Firewall vs Fortinet FortiGate

Compared 13% of the time

Palo Alto Networks NG Firewalls vs Fortinet FortiGate

Compared 5% of the time

Netgate pfSense vs Fortinet FortiGate

Compared 3% of the time

Check Point Quantum Force (NGFW) vs Fortinet FortiGate

Compared 3% of the time

More Fortinet FortiGate Competitors

Netgate pfSense vs KerioControl

Compared 10% of the time

OPNsense vs KerioControl

Compared 9% of the time

Sophos UTM vs KerioControl

Compared 8% of the time

WatchGuard Firebox vs KerioControl

Compared 4% of the time

Sophos Firewall vs KerioControl

Compared 4% of the time

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OPNsense vs Zyxel Unified Security Gateway

Compared 10% of the time

Sophos UTM vs Zyxel Unified Security Gateway

Compared 8% of the time

Sophos Firewall vs Zyxel Unified Security Gateway

Compared 8% of the time

Netgate pfSense vs Zyxel Unified Security Gateway

Compared 8% of the time

Fortinet FortiGate-VM vs Zyxel Unified Security Gateway

Compared 3% of the time

More Zyxel Unified Security Gateway Competitors

Product Reports

Buyer's Guide

Fortinet FortiGate

June 2026

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Buyer's Guide

KerioControl

June 2026

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Buyer's Guide

Unified Threat Management (UTM)

June 2026

Download Zyxel Unified Security Gateway product report

Also Known As

Fortinet FortiGate Next-Generation Firewall

No data available

Overview

Fortinet FortiGate is a versatile network security tool offering features like VPN, firewall, web filtering, intrusion prevention, and scalability. It is known for its performance and integration with other Fortinet products, making it a preferred choice for robust cybersecurity.

Fortinet FortiGate stands out as a comprehensive cybersecurity solution with strong performance and ease of configuration. It delivers unified threat management, integrating features such as dynamic routing, SD-WAN support, and centralized management. Despite its strengths, improvements in the web interface's stability, pricing structures, and reporting capabilities are needed. Users seek better integration with third-party tools and automation advancements to enhance the experience further. These enhancements, alongside improvements in bandwidth management and the reduction of licensing costs, are points of interest for users looking to capitalize on FortiGate's extensive capabilities.

What are Fortinet FortiGate's key features?

VPN: Ensures secure remote connections.
Firewall: Protects against unauthorized access.
Web Filtering: Blocks malicious sites and content.
Application Control: Manages and controls applications.
Intrusion Prevention: Detects and prevents vulnerabilities.
SSL Inspection: Enhances security by inspecting encrypted traffic.

What benefits should be considered when evaluating Fortinet FortiGate?

Affordability: Offers cost-effective security solutions.
Reliability: Known for consistent and stable performance.
Integration: Seamlessly integrates with other Fortinet products.
Comprehensive Protection: Provides broad threat protection capabilities.

Fortinet FortiGate is widely implemented across industries as a primary firewall system for securing internet gateways and safeguarding data centers. It supports businesses in achieving SD-WAN integration and enhances cybersecurity by providing essential features like antivirus, web filtering, and application control. Enterprises utilize FortiGate for securing remote connections and ensuring compliance with security standards, making it adaptable for different network sizes and industries.

Fortinet

KerioControl is a comprehensive network security solution integrating firewall, antivirus, and VPN in an easy-to-use interface for small to medium businesses seeking robust protection.

KerioControl offers a blend of essential security features wrapped in a user-friendly graphical interface that enables effective network management. It supports firewall protection, intrusion detection, real-time monitoring, and flexible VPN capabilities ensuring high reliability and productivity. Despite being suitable for small to medium enterprises, improvements could enhance its overall performance, such as better GUI updates, stronger connectivity, and advanced VPN functionality. Common uses include unified threat management, bandwidth management, remote access, and web filtering.

What are the important features of KerioControl?

Ease of Use: Intuitive interface for effortless security management.
Firewall and VPN Integration: Combines essential security tools seamlessly.
Real-time Monitoring: Offers constant insight into network activities.
Intrusion Detection: Advanced system for prevention and alerts.
Bandwidth Management: Efficient allocation for optimized network usage.

What benefits and ROI should users consider?

Cost Savings: Economical security solution for smaller businesses.
Productivity Gains: Simplified management increases operational efficiency.
Enhanced Security: Comprehensive coverage with antivirus and malware protection.
Remote Access: Streamlined management of multiple sites and networks.

KerioControl is effectively implemented in industries needing strong security measures, supporting small to medium businesses in sectors like IT services, retail, and education. It's particularly well-suited for companies requiring efficient threat management and convenient internet service management across various sites.

GFI

Zyxel Unified Security Gateway provides web filtering, malware protection, antivirus, and peer-to-peer blocking, offering stability, scalability, and cost-effectiveness but facing challenges in robustness and technical support.

Zyxel Unified Security Gateway is a versatile tool used by companies for blocking websites, malware filtering, and acting as a firewall and router. Serving as a gateway for internet access, it is also utilized for VPN and firewall purposes. Users appreciate its performance, although challenges such as high CPU utilization, complex interface, and lack of robust data security hinder its effectiveness. While it performs well for VPN needs, some consider open-source solutions due to open SSL communication limitations. Users have reported issues like unexpected reboots and difficulties integrating it, making it less suitable for next-gen firewall needs.

What features are most important in Zyxel Unified Security Gateway?

Web Filtering: Controls access to inappropriate content.
Malware Protection: Shields against malicious software threats.
Antivirus: Detects and prevents virus infections.
Peer-to-Peer Blocking: Disables unauthorized file sharing applications.

What benefits or ROI should users consider in Zyxel Unified Security Gateway reviews?

Cost-Effectiveness: Provides essential features at an accessible price.
Stability: Reliable function in controlled environments.
Scalability: Adapts to changing business needs.

Zyxel Unified Security Gateway finds use across industries as companies require efficient web filtering and reliable malware protection. It's commonly deployed in sectors needing stable internet access and robust VPN functionalities, although certain limitations prompt users to seek alternative solutions in complex IT environments.

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

Triton Technical, McDonald's

Information Not Available

Buyer's Guide

KerioControl vs. Zyxel Unified Security Gateway

June 2026

Free Report: KerioControl vs. Zyxel Unified Security Gateway

Find out what your peers are saying about KerioControl vs. Zyxel Unified Security Gateway and other solutions. Updated: June 2026.

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