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Cisco Secure Firewall vs OPNsense 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:
 

ROI

Sentiment score
7.5
Fortinet FortiGate is valued for affordability, cost savings, enhanced security, operational efficiency, quick implementation, and long-term ROI benefits.
Sentiment score
5.8
Cisco Secure Firewall provides security and efficiency benefits, though maintenance costs and ROI measurement pose challenges for some users.
Sentiment score
2.5
Entities benefited from rapid returns and cost savings with OPNsense, offering superior threat management compared to Check Point and FortiNet.
Clients are now comfortable and not wasting productive hours on IT support.
The automation part is giving us a cost benefit and speed; we can react faster.
There's definitely an ROI. Having a centralized way of managing and applying policies across the entire organization always helps.
 

Customer Service

Sentiment score
7.0
Fortinet FortiGate's customer service is praised for strong support but experiences inconsistent response times and varying support quality.
Sentiment score
6.8
Cisco Secure Firewall's support is praised for expertise and responsiveness, though some users report occasional service inconsistencies.
Sentiment score
6.4
Many users rely on forums for support, expressing mixed satisfaction with OPNsense's accessibility, cost, and technical support.
I would rate their support for FortiGate a nine out of ten.
They offer very accurate solutions.
The quick resolution of issues with Fortinet FortiGate is due to the support of the company and the fact that the equipment is easy to work with.
I have to provide many logs, yet problems remain unresolved, often requiring workarounds rather than solutions.
I have been working with them on firewalls, wireless, switching, and routing, and the support is the best.
If I have a priority one case, I am able to call the manager to raise the severity.
I mainly rely on community support since the solution is open source.
 

Scalability Issues

Sentiment score
7.3
Fortinet FortiGate is scalable and flexible, though complex deployments and upgrade costs can pose challenges for users.
Sentiment score
6.0
Cisco Secure Firewall is praised for scalability but faces challenges with deployment costs, licensing, and hardware limitations.
Sentiment score
6.5
OPNsense is scalable for diverse organizations, efficiently supporting different user volumes, with some challenges in high-volume voice traffic.
They scale up really well from smaller models like the FortiGate 40 and 50 to bigger sites with the FortiGate 100 for more throughput - up to enterprise datacenters.
The variation comes in terms of the interfaces and throughputs, but from a security perspective, you get the same benefit, irrespective of whether you have an entry-level unit or an enterprise.
We determine sizing based on multiple factors: number of users, available links, traffic types, server count, services in use, and whether services will be published.
Scalability presents a challenge.
Compared to FortiGate and Palo Alto, it lags in configuration and other aspects.
Even with the highest one, the 4600, we still face issues, particularly when transitioning between screens; it becomes very slow.
In my organization, there are 400 users, and OPNsense serves as our gateway and proxy for all of them.
Aside from these aspects, it demonstrated good scalability.
It supports routing, VPN setups, and traffic monitoring with additional packages like Snort and Suricata.
 

Stability Issues

Sentiment score
7.9
Fortinet FortiGate is praised for stability and performance, with timely updates enhancing reliability in diverse configurations.
Sentiment score
7.8
Cisco Secure Firewall is stable and reliable, with minor issues quickly resolved through updates and proper management.
Sentiment score
8.5
OPNsense is stable with high ratings, despite issues with VPN failover, occasional bugs, and hardware compatibility concerns.
We have not had any problems with the operating systems or maintenance of subscriptions.
The solution is very stable.
We have observed that the device is significantly more stable than before.
We work with a cluster with high availability, so if something goes wrong, we have it functioning.
Cisco Secure Firewall offers exceptional performance and stability.
We were begging them to implement two-factor authentication mechanisms, and they never did it, and in the end, something happened.
Stability-wise, I rate the solution a ten out of ten.
It just doesn't respond, so I have to restart it over and over again to try to figure out what the problem is.
OPNsense is the same, but it does have a way of installing the Realtek drivers, which gives you a lot more stability overall on the system.
 

Room For Improvement

Fortinet FortiGate users find issues with support, cost, usability, and features like DLP and reporting compared to competitors.
Cisco Secure Firewall requires upgrades in performance, usability, cost, third-party integration, and advanced features to enhance user experience.
OPNsense faces challenges with integration, user interface, documentation, scalability, performance, and security features, needing enhancements in various areas.
If I have put 10 GBPS of throughput on a firewall and I enable all of these features available, such as IPS or UTM functionalities, the throughput comes down to 1 GBPS.
By providing an integrated solution, users would have access to all features and functionalities within a single window, eliminating the need to navigate through multiple windows.
Investing in a solution that can accommodate such growth would be more cost-effective than repeatedly purchasing new hardware.
Firepower Management Center is quite out of date compared to other vendors.
The integration between Cisco products themselves presents difficulties, such as SD-WAN configuration.
Cisco Firewalls require FMC for management.
For high availability, it's crucial to have a method in place where a designated component oversees the entire process.
The user experience when we create policies can be made easier.
Some of the features include classified traffic and better blocking of newly registered DNS domains.
 

Setup Cost

Fortinet FortiGate offers cost-effective pricing for SMBs, with manageable upfront costs and negotiable long-term discounts.
Cisco Secure Firewall is premium priced, with initial and ongoing costs often higher than competitors, but offers reputed quality.
OPNsense is a cost-effective, flexible solution for enterprises, preferred over costly alternatives like FortiGate and Palo Alto.
The most expensive part is the renewal of the license subscription.
FortiGate is priced lower than Palo Alto.
Last year, I renewed the support for three years, which can sometimes be expensive but depends on the security benefits and how it helps us.
It's considered a premium, but people pay that price for Cisco.
Cisco Secure Firewall seems more expensive than Meraki, even though Meraki is also cloud-based.
The licensing process for Cisco Secure Firewall is convoluted, involving many steps to request and enter a license key.
It's a free solution.
It is a free solution, and when you compare it to alternatives like FortiGate, which is quite powerful but also costly, the value becomes evident.
I would rate the pricing a nine out of ten, especially considering the availability of a free community edition.
 

Valuable Features

Fortinet FortiGate offers comprehensive security features, easy management, high-performance support, and competitive pricing, making it highly valued by users.
Cisco Secure Firewall offers robust security, ease of management, scalability, and seamless integration, enhanced by Talos threat intelligence.
OPNsense is valued for its flexibility, user-friendly interface, robust features, frequent updates, and compatibility with useful plugins.
The firewall, IPS, and VPN functions are the most valuable features.
FortiGate provides solid protection against viruses, malware, and other threats.
Within the same dashboard, you get to see the security profiles, the type of traffic that's passing through, the top applications that are being consumed, etc.
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 includes features like IPS, malware protection, and other security features.
Cisco Firewall has very good features, like trusted applications and restricted access for users based on keywords.
The most valuable features include the basic firewall functionality and the GeoIP location services.
One of the most valuable features is the network checking.
OPNsense is easy to use and open source.
 

Categories and Ranking

Fortinet FortiGate
Sponsored
Ranking in Firewalls
2nd
Average Rating
8.4
Reviews Sentiment
7.2
Number of Reviews
350
Ranking in other categories
Software Defined WAN (SD-WAN) Solutions (1st), WAN Edge (1st)
Cisco Secure Firewall
Ranking in Firewalls
6th
Average Rating
8.2
Reviews Sentiment
7.1
Number of Reviews
416
Ranking in other categories
Cisco Security Portfolio (4th)
OPNsense
Ranking in Firewalls
3rd
Average Rating
8.4
Reviews Sentiment
6.7
Number of Reviews
40
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of June 2025, in the Firewalls category, the mindshare of Fortinet FortiGate is 21.4%, up from 17.8% compared to the previous year. The mindshare of Cisco Secure Firewall is 6.0%, up from 5.5% compared to the previous year. The mindshare of OPNsense is 11.3%, down from 17.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Firewalls
 

Featured Reviews

Jorge Martínez - PeerSpot reviewer
Offers good SD-WAN capabilities and integrates easily with Fortinet devices
I am not part of the initial setup or deployment process since I work in presales. The setup or deployment is quite easy, as you can do a one-touch deployment that automatically connects to the FortiManager cloud when you connect it to a broadband or dynamic IP, allowing you to start the configuration from that point. We usually sell it for on-premises setups. It's on the cloud only when the client has virtual machines or their own service. Sometimes they have a service on the cloud like AWS, but it's more difficult to sell now because AWS has an e-commerce option where you can buy FortiGate directly. The only thing you need is someone to manage and configure.
Carlos Reis - PeerSpot reviewer
Proven reliability and strong support spark trust but system updates slow and complex
The Cisco Secure Firewall product in general has room for improvement. I had a problem this weekend working with one of them, and I think it's very specific, though I'm going to be more general with my answer. Cisco has the FMC as a centralized tool, but sometimes they have too many dependencies. I faced a problem this weekend because while trying to solve an issue with one of the company's firewall management centers, I couldn't update or install an update on the platform due to a remote site being down. The device got stuck in my queue. I had to cancel my maintenance because of that. Everyone was expecting me to fix many bugs, but because of one device, I had to cancel everything. Sometimes the ID is nice around Cisco, but another area they need to improve is the capability to manage multiple devices. The FMC manages many devices, but if I put too many, around 300 devices, it becomes very slow, and the system becomes heavy. When you compare that with solutions such as Palo Alto, Palo Alto can manage many more devices on the same type of platform. Cisco is better at managing things such as RMAs. They do that exceptionally, even with the support. However, when we're talking about the FMC itself, sometimes they have some small issues; the platform is very slow and has too many bugs in the versions. We constantly need to update the platform to maintain stability.
Akram Zaki Hussein - PeerSpot reviewer
Robust network security and management offering a user-friendly interface, open-source flexibility, and cost-effectiveness, with challenges regarding initial setup and the absence of official support
The interface is user-friendly, but there's room for improvement in terms of intuitiveness. The bundle management aspect requires additional attention to make it more intuitive, especially for inspecting high-level traffic. This is crucial, especially for larger companies where the existing features might not be the most optimal choice, given limitations like printer constraints. For high availability, it's crucial to have a method in place where a designated component oversees the entire process. Given that OPNsense plays a pivotal role as a firewall, safeguarding against various threats, having a reliable backup ensures uninterrupted protection even if unforeseen events impact the primary virtual machine. It would be beneficial if OPNsense supported additional virtualization platforms like Hyper-V from Microsoft and VMware, similar to how Kaspersky has integrated them.
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Comparison Review

it_user206346 - PeerSpot reviewer
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
Educational Organization
16%
Computer Software Company
15%
Comms Service Provider
7%
Manufacturing Company
6%
Educational Organization
41%
Computer Software Company
14%
University
5%
Manufacturing Company
4%
Computer Software Company
16%
Comms Service Provider
14%
Government
7%
Educational Organization
6%
 

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 ...
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 Fort...
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 Cis...
Which is better - Meraki MX or Cisco ASA Firewall?
Cisco Adaptive Security Appliance (ASA) software is the operating software for the Cisco ASA suite. It supports netw...
What is the difference between PfSense and OPNsense?
Two of the most common and well recognized firewalls, PfSense and OPNsense both support site-to-site IPsec VPN and cl...
What do you like most about OPNsense?
What I like the most about OPNsense is that it offers an easy-to-use dashboard for device management and control.
What is your experience regarding pricing and costs for OPNsense?
The pricing is competitive when compared to vendors like Palo and FortiNet.
 

Also Known As

FortiGate 60b, FortiGate 60c, FortiGate 80c, FortiGate 50b, FortiGate 200b, FortiGate 110c, FortiGate, Fortinet Firewall
Cisco Adaptive Security Appliance (ASA) Firewall, Cisco ASA NGFW, Adaptive Security Appliance, Cisco Sourcefire Firewalls, Cisco ASAv, Cisco Firepower NGFW Firewall
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
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.
1. Deciso B.V. 2. iXsystems, Inc.  3. EuroBSDCon  4. Netgate  5. Claranet  6. Voleatech  7. Open Systems AG  8. Securebit AG  9. Proxmox Server Solutions GmbH  10. AVM Computersysteme Vertriebs GmbH  Additional customers include: T-Systems International GmbH, Deutsche Telekom AG, Vodafone GmbH, 1&1 IONOS SE, OVHcloud, Hetzner Online GmbH, Strato AG, PlusServer GmbH, Host Europe GmbH, United Internet AG, 1&1 Versatel Deutschland GmbH, QSC AG, Bechtle AG, Cancom SE, Computacenter AG & Co. oHG, T-Systems Multimedia Solutions GmbH, Atos SE, Capgemini SE, Accenture plc, IBM Corporation, Hewlett Packard Enterprise Company, Cisco Systems, Inc.
Find out what your peers are saying about Cisco Secure Firewall vs. OPNsense and other solutions. Updated: June 2025.
855,752 professionals have used our research since 2012.
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