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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
592
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 (28th), 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 June 2026, in the Unified Threat Management (UTM) category, the mindshare of Fortinet FortiGate is 24.9%, down from 36.6% compared to the previous year. The mindshare of KerioControl is 4.0%, up from 3.5% compared to the previous year. The mindshare of Zyxel Unified Security Gateway is 3.6%, up from 3.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Unified Threat Management (UTM) Mindshare Distribution
ProductMindshare (%)
Fortinet FortiGate24.9%
KerioControl4.0%
Zyxel Unified Security Gateway3.6%
Other67.5%
Unified Threat Management (UTM)
 

Featured Reviews

JK
IP Network Security Specialist at MTN Ghana
Process-Level CPU Visibility: Introduce detailed CPU-usage metrics per subsystem (e.g., IPS engine, logging) so administrators can quickly identify and address performance spikes.
Analytics with FortiAnalyzer. Being able to pull in logs not just from our FortiGates but from all our other firewalls and then get them in one view has been a game changer. Whether I’m building an executive dashboard or doing a deep dive forensics session, I get everything I need without navigating consoles.Straightforward Application Control. FortiGate spots and blocks unwanted apps (eq. like BitTorrent or streaming services) with accuracy. Segmentation with VDOMs. We’ve carved our data center into four logical ‘mini-firewalls’ enterprise, core, billing, and WAF—all on one box. Each has its own rules and logs, and any traffic between them still gets inspected. It’s like having multiple appliances without the extra hardware. Always-Up-to-Date Threat Feeds. Daily signature updates and AI-driven threat sensing mean we’re blocking the latest vulnerabilities almost as soon as they’re announced.
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 performance is good."
"I prefer FortiGate because it has a lot of other solutions embedded within it and is the easiest for our technicians to operate."
"The biggest reason I went with Fortinet is that it felt like it has got Palo Alto type of functionality at a much more reasonable price point."
"Valuable features include the Web Application Firewall, and it even has DLP (data leak prevention)."
"The response from the technical support team has always been excellent."
"Using the FortiGate security solution provides comprehensive visibility and advanced layer 7 security, including threat protection, intrusion prevention, web filtering, and application control."
"It's a good product that significantly enhances security and protects organizational data."
"The price is pretty reasonable; it's not like Cisco or Palo Alto, which are more expensive."
"I use Kerio Control for user statistics, intrusion detection and prevention (IPS), web filtering, etc."
"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."
"​It helps us better control internal and external communications.​"
"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."
"The firewall and the content filtering options are valuable."
"What I like the most about Kerio is that I can use the software appliance as a solution, so if the hardware fails for any reason then I can quickly replace it with hardware that I have in stock."
"Kerio Control has helped my organization by hiding my private IP address behind the firewall and we use the proxy destination instead of my website."
"The interface control manager where we can allocate LAN connections to certain VLANs is the most valuable feature. The other feature that's important for us is because obviously everything is remote with MyKerio, as long as the boat has an internet connection, we can log onto the Kerio and get statistics, as well as provide support."
"This is a capable appliance and the standard features work well for us."
"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 solution can scale well."
"The cost is very low."
 

Cons

"The Web-filter in this solution is not very good."
"Their software support needs improvement. I would prefer to have better support for bug fixes. Sometimes, we open a ticket, and it is very difficult to get a solution. Specifically, we are not at all happy with their support for load balancing."
"It should be more stable."
"IP tracing works only so-so."
"There have been several vulnerabilities in the firewall. It is hackable, some of the images are hackable."
"The pricing could always be better."
"I would rate Fortinet support a six out of ten. The immediate response is not that good, particularly when raising a critical or P1 ticket; they lag in the immediate response."
"I would like to see more AI features included in future updates, as that would add significant value."
"Technical support is not the best. As an example, this past weekend I had an issue; it took me four days to get a hold of their support team, and I'm a premium client."
"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."
"After the takeover by GFI, one of the things that Kerio built was MyKerio environment. This has not been very reliable because I get many messages that MyKerio is not functioning. For some reason, there are things that they changed and it is not very reliable at this moment, instead I have to connect to the firewall to see what is happening."
"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."
"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."
"When we did our last update, we had some trouble with the initial syncing process to get our messaging to go through."
"Effectively, I can't use the WiFi facility in the appliance and had to purchase a separate web that supports VLANs."
"The filtering on the unlicensed version of Kerio Control is inefficient - you have to add each website manually, which isn't feasible."
"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

"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."
"If we have an older version, the support costs get quite high."
"The solution requires a license annually, it is not a user license, you can have as many users as your want. I must renew the license regularly per device."
"Its price is good."
"It's a year based license."
"FortiGate Next Generation Firewall is an expensive solution."
"In terms of the market, it's not a cheap product, but it's cost-effective."
"These boxes are not that expensive compared to what they can do, their functionality, and the reporting you receive. Fortinet licensing is straightforward and less confusing compared to Cisco."
"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."
"The price of the solution is reasonable. For additional costs, you can add on more features such as antivirus."
"Pricing is good, but the licensing took a lot of time."
"KerioControl's pricing is good."
"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."
"I pay approximately $50 for the solution on an annual basis."
"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 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
Comms Service Provider
10%
Computer Software Company
9%
Manufacturing Company
9%
Financial Services Firm
7%
Computer Software Company
12%
Comms Service Provider
11%
Construction Company
11%
Financial Services Firm
9%
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 Business369
Midsize Enterprise139
Large Enterprise195
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 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...
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...
 

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: June 2026.
902,495 professionals have used our research since 2012.