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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

"When I survey FortiGate products, I see that they have a good performance, especially in terms of next generation firewalls."
"The GUI is very simple, and what is very good is that every product, regardless of size, has the same interface."
"We are using the FortiGate 100D series. VPN, firewall, anti-malware, OTM, and intrusion prevention are useful features."
"This solution has helped our organization by having strong functions and a reliable firewall."
"The security for endpoints is the most valuable. It is very secure for our workers. It allows us to secure a transaction and enable security for a specific segment in the workflow."
"FortiGate tech support is very good because we get immediate support from them; for example, whenever we raise a ticket, we get an immediate response, and someone attends to help."
"I love the interface."
"It's safe and secures my network and applications in some sites."
"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."
"I did not face any issues with stability while using the tool's trial version."
"Kerio Control has saved time for the members of our team who manage security, we've increased the amount of clients that use VPN, and there has been a 50% increase."
"It just works, it does what it is meant to do."
"From the old way we used to do things, it is night and day, and the efficiency has doubled."
"Kerio is a lot clearer to set up to do particular things, whereas when I do it on a Cisco or a FortiGate I have to go fight with it per week sometimes to do something I can do in 20 minutes on Kerio."
"The firewall appliance itself is the most valuable feature."
"The statistic feature enables us to better use bandwidth management. We monitored the use by mobile, type of application, department, and by users. The bandwidth was solid. Our internet speed is optimized for our research."
"The cost is very low."
"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."
"This is a capable appliance and the standard features work well for us."
"The solution can scale well."
"This is a capable appliance and the standard features work well for us."
 

Cons

"The feature which gives us a lot of pain is ASIC architecture."
"If I had any criticism that I would give FortiGate, it would be that they need to stop changing their logging format."
"There are just some services that aren't available. For example, the Ethernet or point-to-point protocols. They could add these services to their product offering - especially services for ISPs."
"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."
"It should provide better visibility over the network and more information in the form of reports for the end users. Its installation should also be easier."
"The most important feature to have is zero trust, which is lacking in Fortinet FortiGate IPS."
"I believe one area that could be improved in Fortinet FortiGate is posturing, specifically for remote VPN users, as there are OS-based limitations I encountered with only Windows; adding domain restrictions for VPN access would make it more competitive and useful."
"FortiOS is not simple."
"Because of all the security features within Kerio Control, e.g., it can do a deep packet inspection, this can slow down the traffic."
"The solution can be improved to create the capability for larger bandwidths that support our business needs."
"The Kerio hardware devices look cheap and could be improved. Some of our clients are switching to Sophos because their hardware has a more sleek design."
"The logs could be improved for better clarity."
"The comprehensiveness of the security features could be improved upon. However, for the most part, it is pretty good."
"I have had a few issues with HTTPS decryption. The solution also does not show the actual user's Internet usage."
"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."
"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 product has some scalability and data management issues where improvements are required."
"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."
"Although manageable, the user interface is a little bit slow and could be improved."
"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

"There is a subscription-based model to use Fortinet FortiGate. We pay annually for the solution along with the support. If you want to have all the updates, and security patches you will need to renew your support."
"The tool's pricing is neither cheap nor expensive. Overall, I find it to be competitive in the market."
"The pricing of Fortinet FortiGate is average, not cheap or overly expensive compared to other firewall solutions in the market. It's effective and affordable for customers."
"We find the most valuable aspect of this solution is the price. It is affordable, and cheaper than other firewalls."
"I would say that all things considered, the pricing is pretty good."
"Its price could be better."
"I would rate the pricing a five out of ten"
"Pricing is good. They offer a lot of things, the most important is the support. Every time you upgrade your license, you also get insurance for the equipment. If you have any problem with equipment, they send in new equipment."
"It gives us a lot. It does prove to be a very robust product for the cost."
"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."
"The price of the solution is reasonable. For additional costs, you can add on more features such as antivirus."
"There's a one-time fee. For KerioConnect, it's just a server. With KerioControl, you have an option. You can virtualize it on a VMware system or have the hardware. I think mid-range or desktop KerioControl hardware could cost around 2000 dollars for a 25 user client. You need annual renewal for additional features like antivirus."
"Its licensing is yearly. You renew every year. Its price is all-inclusive."
"KerioControl's pricing is good."
"The price is fine."
"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."
"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
Computer Software Company
10%
Comms Service Provider
10%
Manufacturing Company
9%
Financial Services Firm
7%
Computer Software Company
14%
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.
893,438 professionals have used our research since 2012.