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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

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) (13th)
Zyxel Unified Security Gateway
Ranking in Unified Threat Management (UTM)
11th
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 November 2026, in the Unified Threat Management (UTM) category, the mindshare of KerioControl is 4.6%, up from 3.2% compared to the previous year. The mindshare of Zyxel Unified Security Gateway is 3.2%, down from 4.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Unified Threat Management (UTM) Mindshare Distribution
ProductMindshare (%)
KerioControl4.6%
Zyxel Unified Security Gateway3.2%
Other92.2%
Unified Threat Management (UTM)
 

Featured Reviews

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

"The comprehensiveness of the security features that Kerio Control provides us with is good. Before GFI had it, they would have more updates. The updates have been slower, but I like the things that they keep adding like the ability to block by country. I use pretty much every feature."
"But for us, it covers almost everything we do with it, which makes it quite a suitable product for us."
"The product is brilliant."
"The firewall and the content filtering options are valuable."
"The installation is straightforward."
"I use Kerio Control for user statistics, intrusion detection and prevention (IPS), web filtering, etc."
"All of the features of Kerio Control are equally good. Most valuable to us are the firewall rules, the intrusion detection system, and IP address features."
"The flexibility of the system, the capacity to provide the right level of security, and the ability to be integrated into different kinds of infrastructures are the most valuable features."
"The solution can scale well."
"The most valuable features of the solution stem from web filtering, malware protection, and antivirus."
"The Zyxel Unified Security Gateway solution is stable and does its job effectively."
"The cost is very low."
"This is a capable appliance and the standard features work well for us."
 

Cons

"I would like to be able to automatically send email from Kerio Control and have it tell me what my external IPs are, because on one of my lines I have a fixed IP address and on the other it is variable. If there were a permanent way for me to figure out, "Okay, my current external VPN and my firm IP is this," it would help. I need to know the IP address to connect with the VPN and, at the moment, one of the lines sometimes changes its IP address without me knowing it. It's a hassle to figure out what it is."
"The logs could be improved for better clarity."
"One area that confused me a bit when I was building my current network. I use VLANs to have separate functionality on the network, and the appliance I got was the WiFi model, but I discovered that you can't assign WiFi channels to the VLAN. So, you can have WiFi, but its own subnet. You can't run that over the VLAN. Effectively, I can't use the WiFi facility in the appliance and had to purchase a separate web that supports VLANs. In the end, I had to go to GFI support. They confirmed this is just a limited functionality of that device, as it is a low-end device. I don't know if any of their high-end models have a better facility or not."
"One of the problems we do have causes problems with the VPN. The software slows the throughput down too much."
"I would like the customer statistics to be more user-friendly. It should explain more what users have been doing throughout the day. Sometimes, it'll just say they downloaded a big file. Meanwhile, they were connected through a VPN."
"They should improve the remote connectivity feature for users."
"The stability is pretty good. I've only had one issue with it before. It was set to update on its own, and it didn't update and the update failed, so it didn't come back on for some reason."
"If a hardware issue arises with a firewall, then it takes at least a week, maybe a week-and-a-half, to get a new firewall sent by GFI; that's really not acceptable."
"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 integration capability is quite challenging. The system is very complicated, and many features are hidden."
"The product has some scalability and data management issues where improvements are required."
"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."
 

Pricing and Cost Advice

"The price is inexpensive."
"There is a yearly upkeep fee."
"KerioControl's pricing is reasonable. The license for KerioControl is annual. It's difficult to specify an exact cost since it varies depending on the number of users and additional software combined with it. For example, a basic box might cover 25 users, but licenses can be purchased starting from 10 users."
"Search and compare."
"The pricing is in-line with our expectations in terms of the quality that we get for it."
"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."
"The price is fine."
"The biggest advice that I could probably give people is when you buy the solution be prepared to either buy the unlimited license or buy more licenses than you think. Each user license gives you one employee and each a user gives you five devices. In the world nowadays where everybody has a cellphone, tablet, desktop, and laptop, that's four devices. You still get one more device per person. That covers your servers and back-ends."
"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
Construction Company
11%
Comms Service Provider
11%
Manufacturing Company
10%
Computer Software Company
10%
Comms Service Provider
19%
Outsourcing Company
9%
Financial Services Firm
9%
Construction Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business44
Midsize Enterprise9
Large Enterprise3
No data available
 

Questions from the Community

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 product is rated as ten out of ten.
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 KerioControl as our solution.
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 comparisons with other solutions. When our license expires, we plan to explore ope...
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 looking for something new that is slightly simpler. Regarding user experience, the...
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 got the Zyxel Unified Security Gateway, and it works fine. However, we are thin...
 

Overview

 

Sample Customers

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: October 2026.
920,939 professionals have used our research since 2012.