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KerioControl vs Zscaler Cloud Firewall comparison

 

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:
 

ROI

Sentiment score
6.8
KerioControl delivered significant financial benefits through bandwidth optimization, VPN efficiency, and reduced support, maintenance, and security expenses.
Sentiment score
4.8
Zscaler Cloud Firewall enhances global security and efficiency with comprehensive features, delivering 60% savings in time and costs.
I have seen a return on investment with time saving and money saving.
Senior Devsecops Cloud Cybersecurity Specialist at CGI
 

Customer Service

Sentiment score
5.3
KerioControl support receives mixed reviews, with some praise but many report slow responses and reliance on online communities.
Sentiment score
5.5
Zscaler Cloud Firewall support is generally helpful and responsive but may sometimes lack adequacy for premium expectations.
I have never needed to contact customer support as the product is easy to use.
Product manger at Asbis Mediteranean
The response and support are sometimes inadequate, which detracts from the overall experience of an otherwise impressive solution.
Director at Aquila ICT Solutions
The technical support from Zscaler was excellent.
Cyber Security Architect at Accenture
 

Scalability Issues

Sentiment score
6.7
KerioControl suits small to medium businesses but faces scalability issues in larger enterprises, requiring hardware upgrades for increased capacity.
Sentiment score
5.7
Zscaler Cloud Firewall offers excellent scalability, supporting diverse organizations smoothly, with most users rating it between seven and ten.
KerioControl has met some of the network infrastructure needs yet could improve in terms of scalability.
Product manger at Asbis Mediteranean
In this case, Twingate will be very easy compared to Zscaler.
IT Security at a manufacturing company with 11-50 employees
 

Stability Issues

Sentiment score
7.2
KerioControl is stable and reliable, with minor hardware or update challenges, and performs well according to user assessments.
Sentiment score
7.2
Zscaler Cloud Firewall is highly rated for stability and reliability despite minor latency and GUI lag issues.
There were some stability issues due to occasional latency and lags, particularly with the GUI and report generation.
Cyber Security Architect at Accenture
 

Room For Improvement

KerioControl requires improvements in VPN, user interface, support, security, performance, and customization features for large networks.
Zscaler Cloud Firewall needs deployment, support, features, UI, pricing, integration, and dashboard improvements for optimal performance and usability.
I believe the integration of AI could improve the dashboard by making it more agile and effective in monitoring and predicting threats.
Director at Aquila ICT Solutions
The reverse proxy feature for Data Loss Prevention (DLP) is missing.
Cyber Security Architect at Accenture
For now, there is no dashboard or network management system available for Twingate.
IT Security at a manufacturing company with 11-50 employees
 

Setup Cost

KerioControl offers affordable pricing with complex licensing, appreciated features, but high annual fees can be challenging for small offices.
Zscaler Cloud Firewall has subscription pricing influenced by user count and features, making it costlier than some competitors.
The price for the product is rated as ten out of ten.
Product manger at Asbis Mediteranean
Zscaler Cloud Firewall is quite expensive compared to competitors.
Cyber Security Architect at Accenture
 

Valuable Features

KerioControl provides user-friendly navigation, robust security features, VPN support, and efficient network management with positive feedback on ease of use.
Zscaler Cloud Firewall offers comprehensive security with real-time inspection, customizable controls, and automatic features, eliminating hardware needs.
The most valuable features include geo-tagging, which blocks all other IPs except for the specified accounts, and web filtering.
Product manger at Asbis Mediteranean
It is really customized, a security policy that can be applied to the users so they can access only the resources I enable them.
IT Security at a manufacturing company with 11-50 employees
Advanced threat protection features in Zscaler Cloud Firewall are practically the key component that every customer wants.
Director at Aquila ICT Solutions
The best features that Zscaler Cloud Firewall offers are that it is AI powered and automated.
Senior Devsecops Cloud Cybersecurity Specialist at CGI
 

Categories and Ranking

KerioControl
Ranking in Firewalls
27th
Average Rating
8.2
Reviews Sentiment
6.9
Number of Reviews
58
Ranking in other categories
Intrusion Detection and Prevention Software (IDPS) (13th), Unified Threat Management (UTM) (8th)
Zscaler Cloud Firewall
Ranking in Firewalls
38th
Average Rating
8.2
Reviews Sentiment
6.3
Number of Reviews
20
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2026, in the Firewalls category, the mindshare of KerioControl is 1.2%, down from 1.3% compared to the previous year. The mindshare of Zscaler Cloud Firewall is 1.0%, up from 0.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Firewalls Mindshare Distribution
ProductMindshare (%)
KerioControl1.2%
Zscaler Cloud Firewall1.0%
Other97.8%
Firewalls
 

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…
Carlos Snel - PeerSpot reviewer
Director at Aquila ICT Solutions
Has streamlined secure deployments across large enterprises while offering reliable protection and intuitive management
The centralized management console, also referred to as the Zscaler dashboard, impacts the ability of my customers to respond to security incidents significantly. I see it as user-friendly, and clients are really happy with using it, which motivates them to keep using Zscaler Cloud Firewall because they enjoy the GUI. It's very intuitive, making it easy to navigate alerts and incidents. My clients rarely have questions about where to find specific information once Zscaler Cloud Firewall is running. The interface speaks for itself, requiring little to no additional training, which is a major plus. Advanced threat protection features in Zscaler Cloud Firewall are practically the key component that every customer wants. Unfortunately, it is an option and not included in the basic package. Clients need to pay for the next higher bundle to access it, but practically all clients I have dealt with want this feature 100%. Regarding visibility, I can confirm that Zscaler Cloud Firewall indeed includes a feature for application layer visibility embedded in the service. It provides visibility into what you're doing, which is especially interesting nowadays when discussing AI tools, as companies do not want their employees to copy-paste sensitive information into AI systems. We have seen cases such as Samsung's chip design where sensitive info got exposed. The visibility of applications, including cloud applications and AI tools, is significant for compliance with data policies, and you can also run reports and alerts on it.
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Top Industries

By visitors reading reviews
Construction Company
12%
Comms Service Provider
11%
Computer Software Company
11%
Outsourcing Company
8%
Construction Company
11%
Manufacturing Company
10%
Financial Services Firm
8%
Marketing Services Firm
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business44
Midsize Enterprise9
Large Enterprise3
By reviewers
Company SizeCount
Small Business5
Midsize Enterprise2
Large Enterprise13
 

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.
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, datacenter and endpoint. In between you have branch office. So blending EPP and firew...
What is your experience regarding pricing and costs for Zscaler Cloud Firewall?
My experience with pricing, setup cost, and licensing was fine.
What needs improvement with Zscaler Cloud Firewall?
I think Zscaler Cloud Firewall can be improved by adding more features. The needed improvements involve scalability, which is something I wish they would address.
 

Overview

 

Sample Customers

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: August 2026.
909,948 professionals have used our research since 2012.