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KerioControl vs Zscaler Cloud Firewall comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Sep 16, 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 Firewalls
2nd
Average Rating
8.4
Reviews Sentiment
7.0
Number of Reviews
395
Ranking in other categories
Software Defined WAN (SD-WAN) Solutions (1st), WAN Edge (1st)
KerioControl
Ranking in Firewalls
31st
Average Rating
8.2
Reviews Sentiment
7.0
Number of Reviews
57
Ranking in other categories
Intrusion Detection and Prevention Software (IDPS) (19th), Unified Threat Management (UTM) (11th)
Zscaler Cloud Firewall
Ranking in Firewalls
25th
Average Rating
8.2
Reviews Sentiment
8.0
Number of Reviews
18
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of July 2025, in the Firewalls category, the mindshare of Fortinet FortiGate is 21.2%, up from 17.7% compared to the previous year. The mindshare of KerioControl is 1.4%, up from 1.1% compared to the previous year. The mindshare of Zscaler Cloud Firewall is 0.4%, up from 0.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Firewalls
 

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…
Bhaskar Rao - PeerSpot reviewer
Though it helps deal with web traffic or any malicious traffic, it needs to work on its DC performance issues
The product's initial setup phase is moderate in level, so it is neither very complex nor very easy. For the deployment, my company first needs to gather all the requirements of the users and the domain names and consider how many users there are in the company. In the implementation and planning part, my company needs to consider what kind of policies we will create while ensuring that the policies are created based on the requirements of the users. There is a need to segregate the users' requirements since there are separate departments in the company, like the HR department, sales department, IT department, and manufacturing department, so that our company can create policies depending on their requirements. On-site, if you want a GRE tunnel, our company can handle GRE tunnel traffic routing and Zscaler Cloud Firewall, after which Zscaler will take action based on the policies created by our organization. For the deployments and maintenance, a team of five members consisting of two managers and three engineers is required.

Quotes from Members

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

Pros

"The most valuable feature is the VDOM, which allows the customer to have multiple firewalls in a single campus."
"Its administrative panel is very intuitive and simple. It is simpler than the other solutions that we had. As an administrator, we are always looking for the easiest solution to manage network policies. We are able to filter everything on our network and also use the VPN feature, which is important these days when people are working remotely during COVID."
"Its usability is good. We can easily navigate the system, and we have a very good user experience."
"The main reason why I purchased the particular unit was that it had good reviews and what other people were saying as far as its completeness and its leading capabilities in terms of endpoint security was very good."
"The feature I like most is the SD-WAN. It allows you to manage more than one ISP at the same time. And there is a high-availability mode, so if one of your ISPs is down, you still have a backup."
"Fortinet FortiGate's reliability is valuable."
"We have a redundant setup for failover, however, it has not had to fail over ever and we have not had a capacity issue."
"Fortinet FortiGate is a security device. It can optimize security on the networks of a company. It actually protects the company from attacks from outside. With FortiGate, you can categorize the users. You can create a group of users that can access all of the websites for their work. You can limit other users' access."
"The top features are ones that we're not using yet but we soon will be because we've just had broadband upgraded in Australia. We've got something called the National Broadband Network, which is forced onto you, so you have to take it when it arrives. We'll be trying the high availability out soon. We tried that with some load balancing, it didn't quite work as we expected, but I think that was more of a configuration thing rather than a product thing."
"The firewall appliance itself is the most valuable feature."
"Kerio has improved my organization's security."
"I did not face any issues with stability while using the tool's trial version."
"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."
"The solution is user-friendly."
"The solution is easy to manage. Kerio Control is unique compared to other firewalls because it has been around since 2000 when we switched and the name it started with was WinRoute, and then later became Kerio Control. It evolved over time and it is more of a proprietary firewall on its own and has been developed through open source."
"I want to have access to my computer from the outside and Kerio Control plays a role because it has a VPN... It is more reliable because it's a smaller group of computers to target for hackers and the like. The VPN works very well. I use it to work remotely very easily and exchange information, both to and from the location where it's deployed, and there have been no problems there."
"The initial setup is straightforward."
"It helps a lot of companies to reduce their downtime. Also, It helps businesses in terms of being secured and protected from any threats."
"If malicious traffic attacks our on-premises servers, then it gets blocked by Zscaler Cloud Firewall."
"Includes advanced tech protection."
"The solution offers good sandboxing."
"Zscaler Cloud Firewall understands the applications in the current generation and adapts to the present generation cloud applications."
"It is a stable solution."
"I like the ease of deployment and its flexibility. We don't need to deal with license, quotes, procurement, delivery, and installation. Everything is software-based, and it's very easy to operate."
 

Cons

"The solution's framework needs to be frequently updated in order to have a stable solution."
"Web security solutions can be improved."
"Its price could be better."
"One drawback of Fortinet FortiGate is that they provide two types of models: one with a hard disk and another without. The model without a hard disk has very low ROM where you can store very few logs, after which you need to upload it to the cloud or purchase a firewall with SSD. That's the only drawback."
"The platform's compatibility with Wi-Fi equipment needs improvement."
"Improvements for Fortinet FortiGate could be made by making it easier to implement on networks and simpler to add users and accounts that utilize this solution. That's basically the only challenge that I see."
"The user interface could be improved to make it less confusing and easier to set up."
"I have to say that the initial setup was complex. The deployment took a few days to get set up. Initially, we were using an IPVanish. We switched to this tool since we thought it would be easier. But it turns out it wasn't easier to set up and run."
"The security part of the software, like virus scanning, website, traffic monitoring, things like that, can take a beating on the appliance. And when there's a lot of things going on, the system can get bogged down. The actual security functionality of it needs a little bit more work, which I believe they are remedying or attempting to remedy at this time, but that's the downfall at this time."
"When it comes to dealing with updates, there are often bugs on the solution. They should do a lot more testing before they release new versions."
"The denial of service could also be improved. There recently was a big issue with denial of service attacks and it was a bit laborious."
"If you have to dive deeper into the firewall or any other features, then you really have to read up a bit about how to set it up properly. Some of my colleagues, in the beginning, jumped in and made a bunch of rules but then it got really messy. If Kerio had a template or guidelines for best practices, at the beginning, that would really help. With Kerio Control it's basically 'find out for yourself.'"
"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."
"The VPN features are the ones that we really like, but we are using a VPN client to be able to use them. We would like to have an SSL implementation for this same feature so we don't need to install anything on the client side. That's a feature I really miss and that should really be embedded in the product. We really would love to use it via a web browser."
"We'd like to have more integrations Kerio Operator."
"The logs could be improved for better clarity."
"There are several areas for improvement. Firstly, the GUI is outdated, with noticeable lags and delays, especially when generating reports for past transactions."
"I don't have the visibility of a control dashboard or a network management system."
"We are having some issues with internet access being denied when organizational ID-based policies change. For example, a lower level employee ends up getting the same level of access as that of a higher level employee."
"Apart from the issues associated with the product in areas like the DC performance issues and DC failover, Zscaler Cloud Firewall's IP should not have a proxy IP."
"The issue right now is probably that Zscaler is not providing web browser isolation. Another solution, Menlo, offers this. For one customer, we had to send traffic to Menlo to do the isolation for us. It was requested by the customer so that they could integrate any iframe. Zscaler needs to add this type of feature in their next release."
"The product could improve its integration with some legacy systems."
"Pricing is a challenge."
"It would be better if they improved their policy, package visibility, and flexibility while we're creating rules for inspection. It could also be cheaper or more things could be included in the basic package. In the next release, I would like better coverage in the Asia Pacific region and better quality of service."
 

Pricing and Cost Advice

"The price of Fortinet FortiGate when compared to other solutions is high. However, my knowledge of the price is from third parties and I am not sure how accurate it is. I typically work in the technical area of my organization."
"For medium and enterprise organizations, FortiGate is more affordable."
"As far as I'm aware, in our case, it's just a yearly pricing arrangement with no additional licensing costs."
"The price of Fortinet FortiGate is reasonable."
"Its price could be better."
"The cost of Fortinet FortiGate is competitive and not expensive compared to other enterprise- grade solutions. On average, the license cost per year is around seventy percent of the firewall's purchase price."
"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."
"Price-wise, it's at a good price point for our market."
"The pricing is in-line with our expectations in terms of the quality that we get for it."
"It is priced low enough for entry-level, but it has the power to grow with a company without them having to replace it."
"Its price is fair. There are no additional costs."
"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 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."
"Pricing is good, but the licensing took a lot of time."
"The price is fine."
"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."
"The licensing is on a yearly basis. It is somewhere around 30 or 40 pounds per user for our organization."
"There are licensing costs, and I would not say that it's a cheap vendor."
"It is expensive for small businesses."
"There is an annual license required for the use of the Zscaler Cloud Firewall."
"The product is a bit expensive compared to the solutions offered by its competitors, like Palo Alto. There is a need to make yearly payments towards the license in charges associated with the product."
"It comes at a significantly reduced cost while ensuring control and effectiveness."
"On a scale from one to ten, where one is cheap, and ten is expensive, I rate the solution's pricing an eight out of ten."
"Zscaler is priced too high compared to the cost of Fortinet."
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Top Industries

By visitors reading reviews
Computer Software Company
16%
Comms Service Provider
8%
Manufacturing Company
7%
Financial Services Firm
6%
Computer Software Company
22%
Comms Service Provider
8%
Media Company
7%
Manufacturing Company
7%
Computer Software Company
14%
Manufacturing Company
9%
Financial Services Firm
7%
Retailer
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

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?
The logs could be improved for better clarity. It is difficult to understand when there is a threat attack, and handl...
Which lesser known firewall product has the best chance at unseating the market leaders?
Netscope, Zscaler if they continue route they are on now. FIrewalls needs great deal of automation on each end, datac...
What do you like most about Zscaler Cloud Firewall?
The product’s firewall and VPN package are fantastic compared to any other solution.
What is your experience regarding pricing and costs for Zscaler Cloud Firewall?
Zscaler Cloud Firewall is quite expensive compared to competitors. However, it offered moderate value for money.
 

Also Known As

FortiGate 60b, FortiGate 60c, FortiGate 80c, FortiGate 50b, FortiGate 200b, FortiGate 110c, FortiGate, Fortinet 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
Zenith Live, Azure, Carlsberg Group
Find out what your peers are saying about KerioControl vs. Zscaler Cloud Firewall and other solutions. Updated: July 2025.
863,429 professionals have used our research since 2012.