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Cisco Secure Firewall vs Fortinet FortiOS 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
6.3
Fortinet FortiOS offers cost-effective, scalable security, with competitive pricing and partnerships, enhancing ROI compared to top brands.
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
Once it is deployed, I do not have to revisit or replace the hardware.
Network Administrator at a educational organization with 501-1,000 employees
The pricing of FortiOS is competitive and reasonable compared to other leading products such as Palo Alto and Check Point.
Senior Manager at ITX360 (Pvt) Ltd
Fortinet is strong in terms of cost and compatibility with other vendors.
Technology Consultant at NetWiser
 

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
8.2
Fortinet FortiOS support is responsive and helpful but sometimes slow with complex issues, lacking top-tier vendor standards.
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
I would rate them nine or ten out of ten.
Technology Consultant at NetWiser
Fortinet technical support is very responsive and helpful.
Senior Manager at ITX360 (Pvt) Ltd
Support engineers sometimes lack eagerness to assist with issues such as the memory problem.
Director, IT Infrastructure Department at Zemen Bank S.C.
 

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
8.2
Fortinet FortiOS is highly scalable, adapting to different organizations, supporting growth and global deployments, yet may need hardware upgrades.
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)
When customers' networks grow and needs expand, we can easily switch between models to trade up devices.
Technology Consultant at NetWiser
It allows for the expansion of users and devices without additional licensing costs.
Senior Manager at ITX360 (Pvt) Ltd
We have been using Fortinet for bandwidth shaping and many other bandwidth-related functions.
Associate Director IT Operations at Procento
 

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
7.8
Fortinet FortiOS is praised for stability, with minor issues usually tied to configurations or external factors, not the system.
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
While the product is largely stable, it sometimes faces memory issues in specific versions like 11 OE, which can be disruptive.
Director, IT Infrastructure Department at Zemen Bank S.C.
There were no lags, there were no issues, and no hanging of the firewall.
Associate Director IT Operations at Procento
Stability is a seven out of ten because during version migrations, and sometimes with new versions, Fortinet is not as good.
Technology Consultant at NetWiser
 

Room For Improvement

Cisco Secure Firewall needs improvements in interface, licensing, integrations, VPN functionality, configuration, deployment, documentation, and technical support.
Fortinet FortiOS requires improvements in VPN, pricing, compatibility, UI, security features, support, updates, deployment, and pricing consistency.
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
Fortinet FortiOS faces memory issues, which can lead to unexpected downtimes.
Director, IT Infrastructure Department at Zemen Bank S.C.
There should be more documentation on how to use the CLI or how to perform CLI versions of tasks that can be done through the GUI.
Network Administrator at a educational organization with 501-1,000 employees
Compared to other market leaders like Palo Alto and Check Point, FortiOS has many bugs in its initial releases.
Senior Manager at ITX360 (Pvt) Ltd
 

Setup Cost

Cisco Secure Firewall is pricey, but offers good value for enterprises prioritizing features, scalability, and integration with Cisco systems.
Fortinet FortiOS is often pricey but justified by features, with agreements influencing costs, suitable for mid-size businesses.
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
It is an affordable solution for us.
Technology Consultant at NetWiser
Fortinet products are somewhat pricey, similar to Cisco equivalents, however, they have justified their price point.
Network Administrator at a educational organization with 501-1,000 employees
I am satisfied with the pricing, licensing, and setup costs of FortiOS, rating it nine out of ten compared to other familiar leading firewalls.
Senior Manager at ITX360 (Pvt) Ltd
 

Valuable Features

Cisco Secure Firewall is valued for its VPN termination, centralized management, intuitive GUI, robust security, and efficient policy management.
Fortinet FortiOS is praised for UTM, user-friendly interface, robust security, excellent performance, cost-effectiveness, and seamless management.
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 user-friendly when it comes to turning on features, and it has been reliable and effective.
Network Administrator at a educational organization with 501-1,000 employees
The threat intelligence in FortiOS is very high, and the system is scalable without additional licensing costs.
Senior Manager at ITX360 (Pvt) Ltd
The solution offers good threat intelligence, which is crucial for our customers' security purposes.
Technology Consultant at NetWiser
 

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)
Fortinet FortiOS
Ranking in Firewalls
19th
Average Rating
8.4
Reviews Sentiment
8.0
Number of Reviews
82
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 Fortinet FortiOS is 1.1%, down from 1.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Firewalls Mindshare Distribution
ProductMindshare (%)
Cisco Secure Firewall7.7%
Fortinet FortiOS1.1%
Other91.2%
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
MS
Associate Director IT Operations at Procento
Single-pane management has simplified firewall control and has improved risk mitigation
I would not say that Fortinet FortiOS is not very scalable. Generally, what happens is that for enterprises, we hire consultants who do the capacity planning and sizing to determine what kind of firewalls to put in place. At the same time, it is not only the number of users; it also depends on the number of WAN links coming in and everything, because we have been using Fortinet for bandwidth shaping and many other bandwidth-related functions. They should improve their machine learning AI capabilities of Fortinet FortiOS because there is too much competition. Other players are also improving and making a lot of changes in their UI and overall operating system.
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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
8%
Construction Company
12%
Comms Service Provider
9%
Manufacturing Company
8%
Financial Services Firm
7%
 

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 Business43
Midsize Enterprise13
Large Enterprise23
 

Questions from the Community

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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 ...
Features comparison between Palo Alto and Fortinet firewalls
In the best tradition of these questions, Feature-wise both are quite similar, but each has things it's better at, it kind of depends what you value most. PA is good at app control, web filtering a...
What is your experience regarding pricing and costs for Fortinet FortiOS?
I rate the pricing for FortiOS as eight or nine out of ten. It is an affordable solution for us.
What needs improvement with Fortinet FortiOS?
I would not say that Fortinet FortiOS is not very scalable. Generally, what happens is that for enterprises, we hire consultants who do the capacity planning and sizing to determine what kind of fi...
 

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.
Black Gold Regional Schools, Amadeus Hospitality, Jefferson County, Chunghwa Telecom, City of Boroondara, Dimension Data
Find out what your peers are saying about Cisco Secure Firewall vs. Fortinet FortiOS and other solutions. Updated: August 2026.
908,834 professionals have used our research since 2012.