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KerioControl vs Zyxel Unified Security Gateway comparison

 

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)
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 August 2026, in the Unified Threat Management (UTM) category, the mindshare of KerioControl is 4.3%, up from 3.2% compared to the previous year. The mindshare of Zyxel Unified Security Gateway is 3.4%, down from 3.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Unified Threat Management (UTM) Mindshare Distribution
ProductMindshare (%)
KerioControl4.3%
Zyxel Unified Security Gateway3.4%
Other92.3%
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

"At the end of the day, our customers are being managed, looked after, and they're secure, so they're happy."
"When one of the employees of my customers is using the VPN Client, I have created for them that they will always get a message. When the VPN Client connects to Kerio Control from the outside, they will get an email so they know when they are connected and when they are disconnected what is happening to their network."
"The ease of use in the GUI itself is the most valuable feature. The GUI is really the best part of it. We like the traffic rules so we can control who can get to what. It's easy to determine the flow of the traffic itself so we aren't having to guess through command lines and reading out basically command-driven output. It's just a very easy-to-use interface. The interface is the best part of the product."
"On an annual basis, we save not just hundreds of hours but also labor costs, and over the life of the product, I'm sure it's in the tens of thousands of hours because we don't need an inhouse specialist in Kerio technology."
"We have many customer sites and the solution gives us control over bandwidth internet."
"The tool shows what has been blocked externally. It's very good because once installed and correctly set up, it allows you to work from home as if you are in the office, without any errors or issues. It's very simple to use, click to connect or disconnect."
"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, and additionally, the anti-virus is effective with quick options, such as filtering."
"I am impressed with the tool's firewall filtering capacity."
"The most valuable features of the solution stem from web filtering, malware protection, and antivirus."
"The solution can scale well."
"This is a capable appliance and the standard features work well for us."
"The cost is very low."
"The Zyxel Unified Security Gateway solution is stable and does its job effectively."
 

Cons

"If I would suggest anything, it would be to expand on its multifactor authentication to be a little bit more user-friendly. They should do multifactor authentications for the client itself perhaps, rather than served on a webpage, in a page hijack, that might be more user-friendly, but I don't have a lot of complaints about it. It's doing its job. You have to have a certain amount of skills to configure these things anyway, the ones that we use on-site doing point-to-point, and we've been tricked up a few times with their interfaces."
"The filtering on the unlicensed version of Kerio Control is inefficient - you have to add each website manually, which isn't feasible."
"At the moment, our workaround is just to reboot the box every two weeks, which is inconvenient, but if they're going to solve this, then we just have to wait."
"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."
"I have had a few issues with HTTPS decryption. The solution also does not show the actual user's Internet usage."
"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."
"They don't provide content filtering when it comes to search engine results. We had an incident on the network where a blocked site was showing up in search results. We are in a school environment, so we have blocked a site with some of the explicit content so that kids wouldn't see it. When one of them did a search, the results came on the search engine part. When you try to drill down to the website, it blocks, but when you search by image, it brings up all the images. That's one of the reasons why we are looking at Juniper."
"My experience with the solutions technical support is fine but they could be faster in responding."
"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."
"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."
"The integration capability is quite challenging. The system is very complicated, and many features are hidden."
 

Pricing and Cost Advice

"The price is inexpensive."
"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."
"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."
"The price of the solution is reasonable. For additional costs, you can add on more features such as antivirus."
"It is priced low enough for entry-level, but it has the power to grow with a company without them having to replace it."
"My advice is to use your own hardware, and do not use theirs."
"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."
"GFI has made a stupid decision regarding small office licensing. For offices where there are only three to five employees and had five years towards a five user product, they now force these customers to a 10-year user license. I really don't understand it. It's a stupid decision for the small offices who want a good solution for security because they'll probably decide to go to another product. Why should they buy something that they don't use?"
"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
12%
Computer Software Company
11%
Comms Service Provider
11%
Outsourcing Company
8%
Comms Service Provider
19%
Financial Services Firm
8%
Outsourcing Company
8%
Computer Software Company
7%
 

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: August 2026.
908,877 professionals have used our research since 2012.