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Cisco Secure Firewall vs Zscaler Cloud Firewall comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Apr 5, 2026

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
3.9
Cisco Secure Firewall delivers significant ROI by enhancing security, reducing costs, and increasing productivity with reliable, comprehensive features.
Sentiment score
4.8
Zscaler Cloud Firewall enhances global security and efficiency with comprehensive features, delivering 60% savings in time and costs.
There is always a return on investment because you find you invest heavily, but your environment is secure and then you are at rest; you do not need to panic.
Specialist Datacenter And Server at IHS Towers
The biggest return on investment when using Cisco Secure Firewall is that there's no waste in any infrastructure cost and licensing costs for us.
Assistant Vice President at PLDT Enterprise
From my point of view, the biggest return on investment when using Cisco Secure Firewall is the single pane of glass, which is a huge plus for us.
Network Engineer at a government with 10,001+ employees
I have seen a return on investment with time saving and money saving.
Senior Devsecops Cloud Cybersecurity Specialist at CGI
 

Customer Service

Sentiment score
7.0
Cisco Secure Firewall support is praised for responsiveness, expertise, and consistency, despite occasional dissatisfaction with response times.
Sentiment score
5.5
Zscaler Cloud Firewall support is generally helpful and responsive but may sometimes lack adequacy for premium expectations.
I have to provide many logs, yet problems remain unresolved, often requiring workarounds rather than solutions.
VSO at a computer software company with 501-1,000 employees
I have been working with them on firewalls, wireless, switching, and routing, and the support is the best.
Principal Consultant at Epitome Infotech Solutions (P) Ltd
They have expertise and provide solutions for the most difficult problems.
Network Security Administrator at a government with 501-1,000 employees
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
6.5
Cisco Secure Firewall offers excellent scalability and flexibility, despite some cost concerns, efficiently supporting dynamic enterprise needs.
Sentiment score
5.7
Zscaler Cloud Firewall offers excellent scalability, supporting diverse organizations smoothly, with most users rating it between seven and ten.
When something happens in the device, the failover happens very quickly without any interruption.
Network Unit Head at a comms service provider with 501-1,000 employees
Cisco Secure Cloud now allows us to potentially take the management functions of Cisco Secure Firewall, move it into the cloud, and integrate it with other Cisco security products, managing everything from one single pane.
Senior Network Engineer at a insurance company with 5,001-10,000 employees
I rate the scalability as a number 10.
Cybersecurity Team Leader at EMAK For Computer Manufacturing (ECM)
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
7.6
Cisco Secure Firewall is highly regarded for its stability and performance, with improvements in updates and minimal disruptions.
Sentiment score
7.2
Zscaler Cloud Firewall is highly rated for stability and reliability despite minor latency and GUI lag issues.
We have often encountered split-brain scenarios during failover processes and code upgrades, which have been persistent problems for us.
Senior Manager, Network Engineering at TTi Power Equipment
We work with a cluster with high availability, so if something goes wrong, we have it functioning.
I have Cisco Secure Firewall in hospitals, hotels, airports, and shopping malls, and I have never faced complaints of a Cisco Secure Firewall crash or anything similar.
Sr Ict Engineer at ICAD-KSA
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

Cisco Secure Firewall needs improvements in interface, licensing, integrations, VPN functionality, configuration, deployment, documentation, and technical support.
Zscaler Cloud Firewall needs deployment, support, features, UI, pricing, integration, and dashboard improvements for optimal performance and usability.
My ongoing complaint for the last six years has been the lack of CLI functionality, which hinders my ability to work on the firewall, alongside concerns regarding deployment time.
Senior Manager, Network Engineering at TTi Power Equipment
The GUI is useless for me and frustrates me to a very high degree, which led me to switch to the CLI for configuration.
Network Engineer at a logistics company with 10,001+ employees
Firewall as a Service can scale to a very large extent because it is a cloud-based offering that can scale up to a very large number, which is not a problem.
Chief Technology Officer at Binary Global Limited
For now, there is no dashboard or network management system available for Twingate.
IT Security at a manufacturing company with 11-50 employees
The reverse proxy feature for Data Loss Prevention (DLP) is missing.
Cyber Security Architect at Accenture
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
 

Setup Cost

Cisco Secure Firewall is pricey, but offers good value for enterprises prioritizing features, scalability, and integration with Cisco systems.
Zscaler Cloud Firewall has subscription pricing influenced by user count and features, making it costlier than some competitors.
It's good to have them, however, it costs us a lot.
It Administration at Dilcon Community School
Basically, the license for the VPNs is for all the interfaces, and that is the thing that is really expensive compared with Palo Alto.
Technical Account Manager at a tech vendor with 5,001-10,000 employees
It's considered a premium, but people pay that price for Cisco.
Principal Consultant at Epitome Infotech Solutions (P) Ltd
Zscaler Cloud Firewall is quite expensive compared to competitors.
Cyber Security Architect at Accenture
 

Valuable Features

Cisco Secure Firewall is valued for its VPN termination, centralized management, intuitive GUI, robust security, and efficient policy management.
Zscaler Cloud Firewall offers comprehensive security with real-time inspection, customizable controls, and automatic features, eliminating hardware needs.
What stands out positively about Cisco is their training and support, which has effectively prepared engineers to work with their products.
Senior Manager, Network Engineering at TTi Power Equipment
This is very important to my organization, as we work extensively with security because we are a bank, so we can keep the data safe.
Network Security Administrator at a government with 501-1,000 employees
Cisco Secure Firewall allows me to safeguard Layer 7 or Layer 3 and manage the security rules with the business needs of my organization.
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

Cisco Secure Firewall
Ranking in Firewalls
3rd
Average Rating
8.2
Reviews Sentiment
6.9
Number of Reviews
470
Ranking in other categories
Cisco Security Portfolio (2nd)
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 Cisco Secure Firewall is 7.7%, up from 6.0% 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 (%)
Cisco Secure Firewall7.7%
Zscaler Cloud Firewall1.0%
Other91.3%
Firewalls
 

Featured Reviews

RajeshKumar - PeerSpot reviewer
Network Consultant at a outsourcing company with 1,001-5,000 employees
Unified policies have strengthened zero-trust demos and automate rapid threat containment
Feedback and Improvement Areas – Cisco Secure Firewall (Customer Perspective) From a customer point of view, there are a few improvement areas observed while positioning Cisco Secure Firewall in competitive scenarios. 1. Dashboard & Visibility Enhancements Customers often compare firewall dashboards across different OEMs during evaluation. * Competing vendors typically provide more feature-rich and visually detailed dashboards. * There is a perception that Cisco dashboards still require enhancement in terms of visualization, consolidated reporting, and built-in analytics. * Some OEMs advertise additional security capabilities clearly within their publicly available data sheets, making competitive positioning easier. In comparison, Cisco sometimes references separate documentation or explains how certain capabilities (such as anti-spam or antivirus functionality) can be achieved through integration or ecosystem components rather than native, built-in features. This creates a perception gap during customer discussions. Improvement Opportunity: * Enhance dashboard capabilities. * Clearly articulate feature availability in public documentation and data sheets. * Reduce dependency on cross-referenced documentation for commonly compared features. 2. Virtual Firewall / Multi-Instance Capabilities in Lower Models Another competitive challenge relates to virtual firewall capabilities. * Several OEMs provide virtual firewall (VDOM-like) functionality in lower-end models. * In Cisco’s portfolio, multi-instance capability typically starts from higher-end platforms such as the 3K series or higher. * Customers looking for smaller deployments with logical segmentation are often forced to consider higher models, resulting in a price jump. Competitors also offer: * Compact hardware models * Dongle-based firewall appliances * Smaller entry-level products with virtual segmentation In Cisco’s case: * To achieve similar multi-instance functionality, customers must opt for higher-tier models. * This creates a significant pricing gap in entry-level or SMB deployments. This pricing difference becomes a key factor when customers compare solutions. If competitors offer a lower-cost model with virtual segmentation, and Cisco requires a higher platform investment, customers may lean toward alternative OEMs. 3. Documentation Gaps – OT Protocol Visibility In our lab environment, we have deployed Cisco Secure Firewall and are using Application Visibility and Control (AVC) for OT network monitoring. Observations: * OT protocols are clearly visible within application visibility. * The firewall successfully identifies and classifies OT traffic. However: * This capability is not clearly mentioned in publicly available documentation. * When a feature is available and functional, it should be explicitly documented in data sheets and feature guides. The need for third-party integration depends on what we are looking for. Here I am saying that the integration with Cisco NAC can be done because RTC functionality is only available with Cisco ISE and the firewall integration. For other ecosystems, if we use a NAC solution that is not Cisco, we can still integrate it for user authentication, such as with VPN user authentication. But in that case, we don't achieve the same functionality, such as RTC with other NAC solutions. This is one aspect. Another part is that if we are using it, it always happens with some NAC solutions because we have Cisco NAC and Cisco firewall; we want consistent policy across the network, whether the user is on-prem or using VPN services. If this is a unified OEM solution, in that case, we require an agent, such as the Cisco Secure Client. That allows us to easily check the posture status of the remote user and connect to the network effortlessly. But if we are using a third-party solution, we can't achieve that. From a SIEM perspective, certain prerequisites must be fulfilled before integration with Cisco Secure Firewall can be completed. The feasibility of integration depends on the capabilities of the SIEM platform. If the SIEM solution supports the required APIs and event handling mechanisms, similar functionality can be achieved. Therefore, integration itself is generally not the challenge; the key consideration is the desired security outcome within the overall ecosystem. If the customer does not have a SIEM solution and intends to automate quarantine actions or enforce restricted access for users, a Network Access Control (NAC) solution becomes mandatory. In this scenario, the recommended NAC solution is Cisco Identity Services Engine (Cisco ISE). Automated quarantine and dynamic access control workflows are dependent on NAC capabilities. From a feature enhancement perspective for Cisco Secure Firewall, deeper NAC-driven integration adds significant value. 1. TrustSec / Tag-Based Policy Enforcement Cisco ISE supports Cisco TrustSec, which enables Security Group Tag (SGT)-based segmentation. * In traditional (legacy) networks, firewall policies are created based on IP addresses. * With TrustSec, policies are defined based on user identity, group membership, and security tags instead of IP subnets. * When users authenticate to the network, Cisco ISE assigns Security Group Tags (SGTs). * These tags are shared with Cisco Secure Firewall. * The firewall then enforces policies based on SGT-to-SGT rules rather than IP-to-IP rules. Benefits: * Significant reduction in the number of firewall rules * Simplified policy management * Improved scalability * Easier implementation of role-based access control This integration enhances operational efficiency and security posture. 2. Rapid Threat Containment (RTC) Another key capability is Rapid Threat Containment (RTC). If Cisco Secure Firewall detects malicious activity—such as malware download attempts identified via signature-based or advanced threat detection—it can notify Cisco ISE about the compromised endpoint. Based on this input: * Cisco ISE can automatically quarantine the user * The endpoint can be moved to a restricted VLAN * Access can be dynamically limited without manual intervention This automated workflow ensures faster response time and reduces the risk of lateral movement within the network. 3. VPN and Posture Assessment This functionality is not limited to wired or LAN users. For VPN users: * Authentication can be integrated with third-party NAC solutions. * However, if posture assessment (device compliance checking) is required in addition to authentication, Cisco ISE integration with Cisco Secure Firewall becomes essential. Cisco ISE enables: * Endpoint posture validation * Dynamic policy assignment * Automated remediation workflows
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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Comparison Review

it_user206346 - PeerSpot reviewer
Security Consultant at Webernetz.net - Network Security Consulting
Mar 11, 2015
Cisco ASA vs. Palo Alto Networks
Cisco ASA vs. Palo Alto: Management Goodies You often have comparisons of both firewalls concerning security components. Of course, a firewall must block attacks, scan for viruses, build VPNs, etc. However, in this post I am discussing the advantages and disadvantages from both vendors concerning…
 

Top Industries

By visitors reading reviews
Construction Company
11%
Outsourcing Company
10%
Manufacturing Company
9%
Financial Services Firm
9%
Construction Company
11%
Manufacturing Company
11%
Financial Services Firm
8%
Computer Software Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business195
Midsize Enterprise130
Large Enterprise239
By reviewers
Company SizeCount
Small Business5
Midsize Enterprise2
Large Enterprise13
 

Questions from the Community

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Which is better - Fortinet FortiGate or Cisco ASA Firewall?
One of our favorite things about Fortinet Fortigate is that you can deploy on the cloud or on premises. Fortinet Fortigate is very stable, reliable, and consistent. We like that we can manage the e...
How does Cisco's ASA firewall compare with the Firepower NGFW?
It is easy to integrate Cisco ASA with other Cisco products and also other NAC solutions. When you understand the Cisco ecosystem, it is very simple to handle. This solution has traffic inspection ...
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.
 

Also Known As

Cisco Adaptive Security Appliance (ASA) Firewall, Cisco ASA NGFW, Adaptive Security Appliance, Cisco Sourcefire Firewalls, Cisco ASAv, Cisco Firepower NGFW Firewall, Cisco Secure Firewall ASA Virtual - BYOL
No data available
 

Overview

 

Sample Customers

There are more than one million Adaptive Security Appliances deployed globally. Top customers include First American Financial Corp., Genzyme, Frankfurt Airport, Hansgrohe SE, Rio Olympics, The French Laundry, Rackspace, and City of Tomorrow.
Zenith Live, Azure, Carlsberg Group
Find out what your peers are saying about Cisco Secure Firewall vs. Zscaler Cloud Firewall and other solutions. Updated: August 2026.
908,834 professionals have used our research since 2012.