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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
6.9
Number of Reviews
574
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 (2nd)
KerioControl
Ranking in Unified Threat Management (UTM)
11th
Average Rating
8.2
Reviews Sentiment
6.9
Number of Reviews
58
Ranking in other categories
Firewalls (28th), Intrusion Detection and Prevention Software (IDPS) (18th)
Zyxel Unified Security Gateway
Ranking in Unified Threat Management (UTM)
14th
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 October 2025, in the Unified Threat Management (UTM) category, the mindshare of Fortinet FortiGate is 35.1%, down from 39.2% compared to the previous year. The mindshare of KerioControl is 3.2%, up from 3.1% compared to the previous year. The mindshare of Zyxel Unified Security Gateway is 4.2%, up from 2.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Unified Threat Management (UTM) Market Share Distribution
ProductMarket Share (%)
Fortinet FortiGate35.1%
KerioControl3.2%
Zyxel Unified Security Gateway4.2%
Other57.49999999999999%
Unified Threat Management (UTM)
 

Featured Reviews

Vasu Gala - PeerSpot reviewer
A stable solution with an intuitive interface and quick customer service
I have been working with Fortinet FortiGate, WatchGuard, Sophos, and SonicWall. I'm not as comfortable with SonicWall because of their UI and limitations. I prefer Fortinet above all other options. When it comes to configuration, I am confident in my ability to handle various tasks, including creating policies such as firewall rules, web policies, and application policies. Additionally, I can configure VPNs and implement load balancing, among other tasks. Overall, I feel much more comfortable working with Fortinet. Fortinet has made significant improvements by integrating AI with firewalls for threat analysis and prevention. In the past 2-3 years, they have launched FortiSASE and SIEM, and they also provide SOC services. Both Palo Alto and Fortinet FortiGate are excellent. While Fortinet FortiGate comes at higher prices, the functionality and support justify the cost. They promptly resolve firmware issues and inform all support providers about configuration changes.
Constantnos Achilleos - PeerSpot reviewer
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…
Alexander Azikov - PeerSpot reviewer
A robust appliance that is reasonably priced and straightforward to set up
Although manageable, the user interface is a little bit slow and could be improved. There are two user interface options available, namely the basic and the advanced. The basic UI is not very good and doesn't have a lot of features, although it is fast. The advanced UI allows me to do whatever I want, but this is where the issue of speed exists. At one of our sites, the CPU utilization was very high, and for no reason. Technical support needs to be more responsive to requests.

Quotes from Members

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

Pros

"The technical support is good."
"User-friendly and affordable security solution that's recommended for SMB customers. This solution has good technical support."
"The notable features that I have found most valuable are that it includes the antivirus, and also IPS, and even SD-WAN."
"The features that I have found most valuable are the SD-WAN and their IP4 policy."
"LinkGreat firewall capabilities"
"Overall, the pricing of the solution is very good. The product offers good value."
"The multi-threat protection feature helps us secure our organization."
"FortiGate has a very strong unified threat management system."
"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 most valuable feature is to provide users with the ability to log in to the portal page, keep track of their data usage and perform bandwidth management."
"I am impressed with the tool's firewall filtering capacity."
"The solution is user-friendly."
"The most valuable features include geo-tagging, which blocks all other IPs except for the specified accounts, and web filtering."
"It has helped our organization with testing."
"The product is affordable."
"The most valuable features of KerioControl are ease of configuration, user-friendliness, and comfortable to use. It is an all-in-one solution, it comes with many features, such as a firewall, antivirus software, and network protection."
"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."
 

Cons

"The only issue that I have is with FortiNAC. The firewall is fine, but the FortiNAC interface is a little bit too jumbled or too complicated, not as straightforward as it is on the Fortinet FortiGate firewall and FortiAnalyzer."
"There could be improvements in the mathematical algorithms used for behavior analytics of traffic."
"Fortinet should focus on enhancing the capabilities of FortiGate by consolidating its various products, such as FortiGate Cloud, FortiManager, and FortiAnalyzer."
"Two-way inspections are not possible in FortiGate."
"Fortinet's support team consists of a huge networking team, because of which there is a delay in response at times."
"The licensing could be improved as it is a little confusing and too granular for Fortinet FortiGate."
"The support costs and licensing are sometimes so expensive."
"The initial setup is medium complex and takes between five days and a week."
"It has a VPN back to our data center but I don't think it has increased the number of VPN clients extended to those outside our environment"
"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 logs could be improved for better clarity."
"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."
"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 find it a bit costly to pay for the products that I am not using. They need to change their model in such a way that you don't have to pay for the products that you are not using. Its local support and scalability are also not good. I am looking forward to a more scalable product that will be able to grow with time and technology."
"I would like for them to add more security features."
"The upgrades make the network slower."
"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."
"Sometimes it reboots when you least expect it, and that's the main issue."
 

Pricing and Cost Advice

"Fortinet has more device options that are affordable for small businesses than Palo Alto, and its enterprise-level models are also cheaper. Palo Alto also has a separate license for VPN connections and SD-WAN, but FortiGate offers these features standard."
"When I look around at other products, such as Sophos, Fortinet FortiGate is 20% to 30% more expensive with our current cost."
"They need to be competitive with other solutions."
"Fortinet Secure SD-WAN delivered the lowest total cost of ownership (TCO) per Mbps among all other vendors."
"The licensing costs are very competitive."
"In my opinion, the pricing of the product is reasonable."
"It's a very full-featured and it's priced well solution."
"I had to pay for the license for the firewall, but it is guaranteed to have updates. I expect a good service for it. It was about €1000 for a year, and there was no additional cost."
"I am living in Iran and we cannot buy the product from Kerio because of sanctions."
"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."
"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?"
"There is a yearly upkeep fee."
"The price is inexpensive."
"My advice is to use your own hardware, and do not use theirs."
"Licensing is easier with Kerio Control. With FortiGate, we realized the licensing is really hectic, because if you skip one year, you have to back pay that year. If you skip two years, you have to back pay two years. With Kerio Control, if a license expires, one year later you can just reactivate and go on."
"It is priced low enough for entry-level, but it has the power to grow with a company without them having to replace it."
"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
15%
Comms Service Provider
9%
Manufacturing Company
8%
Financial Services Firm
6%
Computer Software Company
21%
Comms Service Provider
8%
Media Company
7%
Manufacturing Company
6%
Comms Service Provider
21%
Computer Software Company
15%
Outsourcing Company
6%
Retailer
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business350
Midsize Enterprise130
Large Enterprise187
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 do you like most about KerioControl?
The solution provides feasibility regarding cyber privacy.
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 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...
 

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: September 2025.
868,759 professionals have used our research since 2012.