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OPNsense vs Palo Alto Networks PA-Series 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
5.9
Fortinet FortiGate offers a high ROI through enhanced productivity, efficiency, security, cost savings, and simplified management.
Sentiment score
3.0
Numerous users reported substantial financial savings and improved network security with OPNsense compared to alternatives like FortiGate or Sophos.
Sentiment score
6.5
Palo Alto Networks PA-Series offers cost-effective security solutions with advanced features, providing significant ROI within three to five years.
The automation part is giving us a cost benefit and speed; we can react faster.
BDM Fortinet & BDM Teamlead at Exclusive Networks
It's a very useful tool to mitigate and protect your enterprise.
Staff Infrastructure & Security Engineer at Mozn Systems
When investing in cybersecurity with Fortinet FortiGate 200, which costs more than $10,000, companies that are growing directly can expect ROI within 1.5 to 3 years.
Manager, Information Technology Operation/Presales at TechMonarch
The network attacks reduced by approximately 60% after using that, even without customizing the custom configuration yet.
Senior IT Infrastructure Engineer at a real estate/law firm with 11-50 employees
For a very little investment, I was able to increase the security of my network.
Administrator at a retailer with 10,001+ employees
The return on investment with this product is a hard question because security tends to be a cost center rather than a profit center.
Global Network Engineering Technical Lead at a healthcare company with 5,001-10,000 employees
Palo Alto Networks PA-Series will be more reliable and will save money, time, and multiple resources.
Project Engineer at IT Solution
Palo Alto Networks PA-Series is definitely worth the investment a company is paying to use it.
Senior Network Security Engineer at UNITE HERE HEALTH
 

Customer Service

Sentiment score
6.5
Fortinet FortiGate's 24/7 support is generally well-rated but needs improvement in response speed for urgent issues.
Sentiment score
5.3
OPNsense users mostly find community forums and documentation sufficient, though some express dissatisfaction with official support availability and cost.
Sentiment score
6.2
Palo Alto Networks PA-Series customer service is praised for knowledge but criticized for slower response times compared to Cisco.
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.
IT Manager at a consultancy with 10,001+ employees
I would rate the technical support for Fortinet FortiGate a ten out of ten.
NAC Support at Rah Infotech Pvt Ltd
As a solution provider, when I encounter problems, I connect directly with Fortinet support, and they provide solutions within a very short time.
Manager, Information Technology Operation/Presales at TechMonarch
Compared to some open-source projects with weak support, OPNsense stands out for having both a strong community and commercial backing options.
ISO 27001 Lead Implementer at a consultancy with 11-50 employees
I mainly rely on community support since the solution is open source.
Senior Client Solutions Architect at a tech services company with 1,001-5,000 employees
If you say you do not have one, it is finished. This is where the monopoly starts.
Senior Solutions Engineer at a educational organization with 201-500 employees
They're constantly following up after a case has been opened to ensure that it has been resolved properly.
Global Network Engineering Technical Lead at a healthcare company with 5,001-10,000 employees
Cisco TAC support comes within five to ten minutes on the call.
Cloud Network Engineer at a insurance company with 5,001-10,000 employees
Initially, it took one or two hours to get a Palo Alto engineer, which is quite slow.
Operations Specialist - MX Operations at Bank Alfalah Limited
 

Scalability Issues

Sentiment score
7.1
Fortinet FortiGate is praised for scalability and adaptability across enterprises, though some users face cloud scaling and upgrade challenges.
Sentiment score
6.8
OPNsense offers scalable and flexible network solutions, effectively supporting mid-sized to enterprise needs with appropriate hardware or virtualization.
Sentiment score
6.9
The PA-Series provides excellent scalability for enterprises, with virtual models offering adaptability for thousands of users and devices.
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.
IT Manager at Daltons Limited
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.
Cewa Solutions Architect at a tech services company with 11-50 employees
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.
General Surgery Specialist at Helwan University Cairo
OPNsense is an extremely scalable solution.
Owner at Networks srl
I use Zenarmor, pinning it to one core for packet inspection, and the CPU performance seems very good.
Senior Client Solutions Architect at a tech services company with 1,001-5,000 employees
OPNsense's scalability is excellent; I just need to resize my hardware and upgrade the server, and voilà, I am good to go.
Senior IT Infrastructure Engineer at a real estate/law firm with 11-50 employees
If you talk about virtual firewall, it is easy to autoscale.
Cloud Network Engineer at a insurance company with 5,001-10,000 employees
The solution can handle more than ten thousand users in my organization.
Operations Specialist - MX Operations at Bank Alfalah Limited
There are no restrictions in scalability.
Asisstant Manager at Yaskawa America, Inc
 

Stability Issues

Sentiment score
7.7
Fortinet FortiGate offers reliable and consistent performance, with quick resolution for occasional bugs, ensuring minimal downtime and high availability.
Sentiment score
7.3
OPNsense is stable with occasional issues; praised for security and UI, performance varies with hardware and resource availability.
Sentiment score
8.2
Palo Alto Networks PA-Series is praised for stability due to consistent updates, high availability, and reliable long-term operation.
We're experiencing 99.999% availability consistently.
Manager, Information Technology at a consumer goods company with 11-50 employees
I would rate the stability of Fortinet FortiGate a ten out of ten.
NAC Support at Rah Infotech Pvt Ltd
Currently, we are experiencing a general outage of one of the main internet service providers of the Dominican Republic, and we have not been impacted in our operations because with SD-WAN, we have another internet service provider and we are working with the second WAN connection without any disruption.
CISO at a financial services firm with 1,001-5,000 employees
For home and small network use, OPNsense is also reliable, providing enterprise-grade security at no cost.
ISO 27001 Lead Implementer at a consultancy with 11-50 employees
The only challenge faced was its inadequacy to manage large voice traffic effectively, even with dedicated hardware.
Senior Network Engineer at a comms service provider with 11-50 employees
At the latest code level, I haven't experienced any crashes.
Senior Client Solutions Architect at a tech services company with 1,001-5,000 employees
I am giving stability a rating of 10 out of 10 because since implementation, we have not observed any issues with Palo Alto Networks PA-Series related to version, vulnerabilities, or anything else.
Cloud Network Engineer at a insurance company with 5,001-10,000 employees
If the data plane hangs or gets stuck, then we can troubleshoot using the management plane.
Project Engineer at IT Solution
 

Room For Improvement

Fortinet FortiGate users face high costs, integration and stability issues, sluggish support, and need improvements in usability and security features.
OPNsense users face VPN setup issues, inadequate documentation, performance shortfalls, high pricing, and request better usability and features.
Palo Alto Networks PA-Series faces high costs, complex setup, slow support, and demands for better integration, UI, and features.
It would be better for customers to get immediate replacements even with a standard subscription.
Director at a tech services company with 11-50 employees
It is how quickly each of these companies adapts to that and brings in more value to the customer.
Principal Consultant at Epitome Infotech Solutions (P) Ltd
The main area for improvement in Fortinet FortiGate is the firmware versions, as we face uncertainties regarding upgrades and frequent bugs that require self-fixing of problems.
Senior Manager IT at a tech services company with 1,001-5,000 employees
I would like the APIs to be more mature and more developed and have more options to automate threat hunting.
Owner at Networks srl
Enhancing its performance for significant amounts of data traffic would make it closer to a perfect solution.
Senior Network Engineer at a comms service provider with 11-50 employees
It would be beneficial if they could create some videos on how to set it up themselves.
Administrator at a retailer with 10,001+ employees
You can buy cheaper products, but I believe in the value they're giving us.
Global Network Engineering Technical Lead at a healthcare company with 5,001-10,000 employees
The interface of Palo Alto Networks PA-Series should be made much more user-friendly.
IT Coordinator at CSA Makati
For the next release of the Palo Alto Networks PA-Series firewall, I would like to see logs monitoring included.
Asisstant Manager at Yaskawa America, Inc
 

Setup Cost

Fortinet FortiGate is cost-effective with a good feature set, ideal for mid to large enterprises, though complex licensing.
OPNsense is a cost-effective, open-source solution for enterprises, reducing expenses compared to FortiGate and Palo Alto alternatives.
Palo Alto Networks PA-Series provides high-end security and support valued by enterprises, despite its higher price compared to competitors.
It offers cost savings as it is generally cheaper than the competition.
IT Infrastructure Architect at Apotek 1
It is about 20% cheaper.
Network Security Engineer at TD SYNNEX
The advantages of Fortinet FortiGate over its competitors include good pricing and meeting our requirements at a lower cost.
Information Technology Infrastructure Section Head at a consumer goods company with 11-50 employees
I consider the pricing of OPNsense to be high when compared with other market products.
Senior Network Engineer at a comms service provider with 11-50 employees
OPNsense is free, the licensing and setup was easy.
Administrator at a retailer with 10,001+ employees
The firewall is expensive for every company, but the cost is worth it to ensure maximum security.
Operations Specialist - MX Operations at Bank Alfalah Limited
The price of Palo Alto Networks PA-Series is expensive.
IT Coordinator at CSA Makati
Overall, the pricing is good, but if they included GlobalProtect, it would be more valuable.
Project Engineer at IT Solution
 

Valuable Features

Fortinet FortiGate offers robust security, ease of use, and integration, with cost-effectiveness and reliable support, enhancing network efficiency.
OPNsense provides user-friendly configuration, robust security features, and adaptability, making it ideal for enterprise and IT network management.
Palo Alto Networks PA-Series offers advanced security features and simplified management for organizations prioritizing data security and flexibility.
They put in a thing called the FortiCookbook, which is very easy to read with real-life scenarios that make networking tasks like joining networks very straightforward.
IT Manager at Daltons Limited
The firewall and VPN features are the most valuable in protecting our customers' networks.
Sales & Support at a tech services company with 1-10 employees
The most valuable feature is the deep inspection for traffic, which is capable of identifying zero-day attacks.
Consultant at SKYE AS
The most valuable features include the basic firewall functionality and the GeoIP location services.
Senior Network Engineer at a comms service provider with 11-50 employees
I can have a Wi-Fi VLAN and feel secure that the server network or the VM network that I have on a different VLAN are isolated, and they cannot talk to one another, which adds a great level of security.
Administrator at a retailer with 10,001+ employees
It offers enterprise-grade features such as intrusion detection and prevention system, VPN support, traffic shaping, and web filtering, all without license cost.
ISO 27001 Lead Implementer at a consultancy with 11-50 employees
Integrated threat intelligence has empowered my organization to adapt to threats by taking a lot of the burden off us; there's just no way we would see the same breadth of knowledge that a vendor or manufacturer would have.
Global Network Engineering Technical Lead at a healthcare company with 5,001-10,000 employees
Palo Alto Networks PA-Series has multiple security features, including antivirus, IPS, and behavior-based analysis.
Project Engineer at IT Solution
The most effective features of the solution are its Magic Quadrant positioning, making it a leading firewall on perimeter areas and internet edges.
Operations Specialist - MX Operations at Bank Alfalah Limited
 

Categories and Ranking

Fortinet FortiGate
Sponsored
Ranking in Firewalls
1st
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
592
Ranking in other categories
Secure Web Gateways (SWG) (2nd), Intrusion Detection and Prevention Software (IDPS) (1st), Software Defined WAN (SD-WAN) Solutions (1st), WAN Edge (1st), ZTNA (1st), Unified Threat Management (UTM) (1st)
OPNsense
Ranking in Firewalls
5th
Average Rating
8.2
Reviews Sentiment
6.6
Number of Reviews
47
Ranking in other categories
No ranking in other categories
Palo Alto Networks PA-Series
Ranking in Firewalls
20th
Average Rating
8.6
Reviews Sentiment
7.0
Number of Reviews
37
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of June 2026, in the Firewalls category, the mindshare of Fortinet FortiGate is 15.1%, down from 21.7% compared to the previous year. The mindshare of OPNsense is 8.5%, down from 10.7% compared to the previous year. The mindshare of Palo Alto Networks PA-Series is 1.2%, up from 0.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Firewalls Mindshare Distribution
ProductMindshare (%)
Fortinet FortiGate15.1%
OPNsense8.5%
Palo Alto Networks PA-Series1.2%
Other75.2%
Firewalls
 

Featured Reviews

JK
IP Network Security Specialist at MTN Ghana
Process-Level CPU Visibility: Introduce detailed CPU-usage metrics per subsystem (e.g., IPS engine, logging) so administrators can quickly identify and address performance spikes.
Analytics with FortiAnalyzer. Being able to pull in logs not just from our FortiGates but from all our other firewalls and then get them in one view has been a game changer. Whether I’m building an executive dashboard or doing a deep dive forensics session, I get everything I need without navigating consoles.Straightforward Application Control. FortiGate spots and blocks unwanted apps (eq. like BitTorrent or streaming services) with accuracy. Segmentation with VDOMs. We’ve carved our data center into four logical ‘mini-firewalls’ enterprise, core, billing, and WAF—all on one box. Each has its own rules and logs, and any traffic between them still gets inspected. It’s like having multiple appliances without the extra hardware. Always-Up-to-Date Threat Feeds. Daily signature updates and AI-driven threat sensing mean we’re blocking the latest vulnerabilities almost as soon as they’re announced.
Moutaz Sheikh Alard - PeerSpot reviewer
ISO 27001 Lead Implementer at a consultancy with 11-50 employees
Has helped simulate enterprise security setups and strengthens network segmentation practices
For my capstone, I use OPNsense for my project and its broader benefits for enterprise and cybersecurity context. OPNsense is an open source based firewall and routing platform. It offers enterprise-grade features such as intrusion detection and prevention system, VPN support, traffic shaping, and web filtering, all without license cost. This platform has a modular design, a clean web-based GUI, and frequent updates that prioritize security and usability. It competes with commercial firewalls such as Cisco ASA, FortiGate, and Palo Alto, but stands out because it's community-driven, cost-effective, and transparent. I find OPNsense's feature of acting as a central firewall and gateway most valuable, providing robust point segmentation between the internal network and DMZs in my capstone project, intrusion detection to monitor malicious traffic, VPN services for secure remote access, and logging and monitoring for compliance and auditing. This allows me to simulate a real-world enterprise environment on a smaller scale, demonstrating both security hardening and network efficiency. OPNsense impacts my projects and home network positively because its cost-effectiveness is perfect for lab and enterprise setup without expensive licensing. The flexibility, easy VLAN and DMZ configuration supports different zones such as web servers, mail servers, and log servers. The security-first design for IDS/IPS integration helps me showcase modern defense-in-depth strategies. The user-friendly management through the web GUI makes it possible to manage complex firewall rules clearly, which is critical when documenting and presenting a capstone. Scalability is also an advantage. Although my project is lab-based, OPNsense can scale into production deployments in SMBs and enterprise.
Rohit Ghorpade - PeerSpot reviewer
Cloud Network Engineer at a insurance company with 5,001-10,000 employees
Identity-based perimeter control has improved security and supports reliable remote access
Currently, we are working with vendors such as Palo Alto Networks PA-Series, Cisco, Check Point, and Citrix. Palo Alto Networks PA-Series is a better firewall. Deep packet inspection and threat prevention basically comply with whatever traffic is incoming and outgoing through the firewall. I do not think anything improvement is required. The thing is that Palo Alto Networks PA-Series works mostly on a license-based model. If you want to utilize any feature, you have to purchase the license. For example, URL filtering requires a license purchase. It simplifies the implementation because LDAP server profile can be integrated. Basically, that simplifies the implementation of access rule or security policy.
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Top Industries

By visitors reading reviews
Comms Service Provider
10%
Computer Software Company
9%
Manufacturing Company
9%
Financial Services Firm
7%
Comms Service Provider
17%
Computer Software Company
10%
Manufacturing Company
8%
Financial Services Firm
6%
Comms Service Provider
9%
Computer Software Company
8%
Government
8%
Manufacturing Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business369
Midsize Enterprise139
Large Enterprise195
By reviewers
Company SizeCount
Small Business32
Midsize Enterprise6
Large Enterprise8
By reviewers
Company SizeCount
Small Business14
Midsize Enterprise6
Large Enterprise17
 

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 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 is your experience regarding pricing and costs for OPNsense?
Setup cost is almost zero as one can simulate the whole environment using open source version. Pricing seems fair eno...
What needs improvement with OPNsense?
When I talk about VPN, I am not completely satisfied with the VPN functions of OPNsense. What I have received so far ...
What is your experience regarding pricing and costs for Palo Alto Networks PA-Series?
If we look at the features, then the price is good, but they do charge for the GlobalProtect VPNs. Overall, the prici...
What needs improvement with Palo Alto Networks PA-Series?
There is room for improvement in Palo Alto Networks PA-Series in the areas where they can minimize applications and i...
What is your primary use case for Palo Alto Networks PA-Series?
I am using Palo Alto Networks PA-Series to ensure protection and cybersecurity by preventing and implementing network...
 

Also Known As

Fortinet FortiGate Next-Generation 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
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.
Information Not Available
Find out what your peers are saying about OPNsense vs. Palo Alto Networks PA-Series and other solutions. Updated: June 2026.
902,270 professionals have used our research since 2012.