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KerioControl vs Zyxel Unified Security Gateway comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Nov 7, 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 Unified Threat Management (UTM)
1st
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
591
Ranking in other categories
Secure Web Gateways (SWG) (2nd), Firewalls (1st), Intrusion Detection and Prevention Software (IDPS) (1st), Software Defined WAN (SD-WAN) Solutions (1st), WAN Edge (1st), ZTNA (1st)
KerioControl
Ranking in Unified Threat Management (UTM)
8th
Average Rating
8.2
Reviews Sentiment
6.9
Number of Reviews
58
Ranking in other categories
Firewalls (27th), Intrusion Detection and Prevention Software (IDPS) (15th)
Zyxel Unified Security Gateway
Ranking in Unified Threat Management (UTM)
12th
Average Rating
6.6
Reviews Sentiment
4.9
Number of Reviews
4
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of May 2026, in the Unified Threat Management (UTM) category, the mindshare of Fortinet FortiGate is 26.6%, down from 36.8% compared to the previous year. The mindshare of KerioControl is 3.8%, up from 3.5% compared to the previous year. The mindshare of Zyxel Unified Security Gateway is 3.7%, up from 3.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Unified Threat Management (UTM) Mindshare Distribution
ProductMindshare (%)
Fortinet FortiGate26.6%
KerioControl3.8%
Zyxel Unified Security Gateway3.7%
Other65.9%
Unified Threat Management (UTM)
 

Featured Reviews

Abhinandan Yadav - PeerSpot reviewer
Network Security Engineer at Arrow PC Network Pvt Ltd
Unified security and sd-wan have improved uptime and cut wan costs for multi-site branches
Users report stability issues in certain versions, which requires regular updates. Real-world attacks have also highlighted the need for urgent patching of vulnerabilities.Fortinet FortiGate, while a powerful and feature-rich web firewall, could improve in areas like firmware stability, documentation, and ease of use. The learning curve can be steep for some users. For beginners, support quality can vary, and frequent updates with occasional vulnerabilities call for careful patch management. However, once Fortinet FortiGate is configured, it remains highly reliable and efficient. Customer support needs improvement, as I find it very slow, with reports from other users reflecting that customer support is inadequate.
Constantnos Achilleos - PeerSpot reviewer
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…
reviewer2399337 - PeerSpot reviewer
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…

Quotes from Members

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

Pros

"I find Fortinet FortiGate to be quite stable, as I have never heard of any issues where they broke or malfunctioned; they are always working."
"I would recommend Fortinet FortiGate IPS as it is a core component of cybersecurity for our company."
"The most valuable feature is the bundled subscription, which is IPS, TV and web filtering."
"FortiGate has threat protection, antivirus, and even SSL encryption and decryption, and a few customers also use this firewall for web filtering and application control."
"Its stability is the most valuable."
"Provides good VPN capabilities."
"This solution is very stable."
"One of the best features of Fortinet FortiGate is that it's a very powerful equipment that gives many security features in a single box with good performance, and the user interface is friendly to use and configure."
"The fact that the setup is so easy is one of the solution's great selling points."
"It has saved a lot of time and it was a secure way of doing it too. We had a whole contact center that worked from home for a period of time and that's a 21 hour a day contact center that we moved, that was spread out across the greater Brisbane region and working on home internet connections. Surprisingly, we didn't have a lot of stability issues anyway on those connections, but Kerio didn't blink, so that was good."
"The anti-virus and perimeter security functionality minimizes vulnerabilities in our network and better secures our data, and this also decreases downtime of devices due to viruses and malware attacks."
"The solution’s firewall and intrusion detection features are quite good because you can see exactly who is attacking you and who is getting blocked."
"The installation is straightforward."
"We went from a very secure, regulated on-prem environment to a diverse working from home environment overnight, and Kerio was key to that."
"The stability of Kerio Control is good."
"The most valuable features of Kerio Control are the IPS and traffic rules. The traffic rules are very user-friendly and the IPS is working well. Additionally, the anti-virus is effective with quick options, such as filtering."
"The solution can scale well."
"The Zyxel Unified Security Gateway solution is stable and does its job effectively."
"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."
"This is a capable appliance and the standard features work well for us."
"The cost is very low."
 

Cons

"The solution needs to improve its integration with cybersecurity."
"We faced some technical issues on the Fortinet side."
"The visibility of the network can be better. The GUI can be improved for better visibility of the network flow. Other solutions have better GUI in terms of network visibility."
"The monitor and the visibility, in this proxy, is very weak."
"One of the problems I was having was with user mapping, and it is an issue for which I have escalated tickets with Fortinet support."
"The most important feature to have is zero trust, which is lacking in Fortinet FortiGate IPS."
"There were situations of availability related to their switching solutions due to box errors."
"I would like to see more AI features included in future updates, as that would add significant value."
"When we did our last update, we had some trouble with the initial syncing process to get our messaging to go through."
"The trial duration of the product should be extended."
"They should improve the remote connectivity feature for users."
"The overall speed needs improvement. Internet connectivity speed needs to be improved somehow."
"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."
"The improvement that we are looking for is for when decide to move some part of our application to the cloud."
"The improvement that we are looking for is for when we decide to move some part of our application to the cloud."
"The comprehensiveness of the security features could be improved upon. However, for the most part, it is pretty good. They could add more logs. I would like to see more detailed reporting, custom reporting from the logs, and more of a streamlined interface for certain aspects."
"I have never seen it in any company that I've worked with before, and I would advise other companies not to buy it."
"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."
"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 product has some scalability and data management issues where improvements are required."
 

Pricing and Cost Advice

"The price is high compared to some of the other solutions."
"Fortinet FortiGate as a less expensive solution than Palo Alto."
"It has a competitive price."
"Work through partners for the best pricing."
"Fortigate's pricing is competitive."
"By default, they give SD-WAN along with the firewall. They don't have separate licensing for the SD-WAN functionality. However, they have security licenses that are sold separately on a subscription basis. Customers can consume these security features to protect their users from internet traffic."
"Fortinet FortiGate is expensive."
"It is not the cheapest one, but its price is very competitive."
"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."
"Its licensing is yearly. You renew every year. Its price is all-inclusive."
"Its initial cost is less as compared to other products. It becomes a bit costly when you pay for the products that you don't use. We paid for almost all the products through subscription, but we are using only a few products. We use EndPointSecurity, Kerio Connect, WebMonitor, and LanGuard. We don't use the rest of the products."
"The fixed model of users and devices is a bit of a problem for us. We want to be able to expand it fast and not have to contact our supplier first to get a license... If they had a larger fixed price with unlimited users or devices, that would help. Now, it's five users each time. A pack of 100 or 200 users for a certain price would make it more dynamic and user-scalable."
"Pricing is good, but the licensing took a lot of time."
"The price of the solution is reasonable. For additional costs, you can add on more features such as antivirus."
"The yearly maintenance fee is a bit high for the Kerio Control Boxes. The end of life for the devices is kind of short. It seems like they're making you upgrade within a short period of time. They should at least allow five years, but it seems like they are changing their end of life to be shorter to generate revenue."
"The price is inexpensive."
"The price of Zyxel Unified Security Gateway is good compared to other similar products in the market."
"This gateway is pretty cheap."
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Top Industries

By visitors reading reviews
Computer Software Company
10%
Comms Service Provider
10%
Manufacturing Company
9%
Financial Services Firm
7%
Computer Software Company
15%
Comms Service Provider
12%
Financial Services Firm
7%
Manufacturing Company
7%
Comms Service Provider
19%
Outsourcing Company
8%
Financial Services Firm
7%
Computer Software Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business367
Midsize Enterprise135
Large Enterprise193
By reviewers
Company SizeCount
Small Business44
Midsize Enterprise9
Large Enterprise3
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...
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 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...
What needs improvement with KerioControl?
Regarding KerioControl's application awareness and control feature, I have not used it much.
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...
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.
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...
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...
 

Also Known As

Fortinet FortiGate Next-Generation 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
Triton Technical, McDonald's
Information Not Available
Find out what your peers are saying about KerioControl vs. Zyxel Unified Security Gateway and other solutions. Updated: April 2026.
893,311 professionals have used our research since 2012.