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Azure 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
5.8
Fortinet FortiGate offers cost-effective, robust security, reducing expenses, enhancing efficiency, easy implementation, quick ROI, and improved network management.
Sentiment score
3.0
Azure Firewall provides cost-efficient security for small applications, with varied ROI experiences depending on organizational needs.
Sentiment score
3.8
OPNsense offers quick ROI, annual savings, improved network protection, efficiency, but faces challenges like market disruptions and cyber threats.
Clients are now comfortable and not wasting productive hours on IT support.
Managing Director at a manufacturing company with 10,001+ employees
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
With Azure Firewall on the cloud, you just need to subscribe to the firewall, configure it, and it will help you protect your environment.
Technical Solution Architect at liwa
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
 

Customer Service

Sentiment score
6.6
Fortinet FortiGate's customer service is generally praised for responsiveness, though some users experience delays in critical situations.
Sentiment score
4.2
Azure Firewall support is generally satisfactory, though some suggest improvements in response time and mention occasional third-party reliance.
Sentiment score
4.9
Users often solve issues using online resources, valuing community help, but suggest OPNsense centralize and improve support options.
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
Microsoft provides excellent customer support, especially with premium support plans.
DevOps Engineer at a tech vendor with 1,001-5,000 employees
Nevertheless, the final support from Microsoft remains effective.
Information Technology Architect at GMS INC
With Azure products, customer support is really good.
Senior Manager, Information Security at NetSol Technologies Inc.
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
 

Scalability Issues

Sentiment score
7.1
Fortinet FortiGate is scalable and popular for SMEs but requires careful design and may incur scaling costs and licensing constraints.
Sentiment score
6.4
Azure Firewall efficiently scales with traffic, supports global users, but larger enterprises seek further scaling improvements for extensive demands.
Sentiment score
6.6
OPNsense is scalable and adaptable, supporting small to large deployments with flexibility in hardware upgrades and virtual machines.
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
Based on my experience, I would rate it nine out of ten for scalability.
Cybersecurity Engineer at AXSYS
Azure Firewall is highly scalable, and I would give it a scalability rating of nine out of ten.
DevOps Engineer at a tech vendor with 1,001-5,000 employees
When we started deploying the solution, it was not a mature product at times.
Senior Manager, Information Security at NetSol Technologies Inc.
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
 

Stability Issues

Sentiment score
7.7
Fortinet FortiGate is praised for its stability, with effective long-term performance and improvements in newer firmware versions.
Sentiment score
8.5
Azure Firewall is praised for stability and reliability, with users noting high uptimes and positive comparisons to competitors.
Sentiment score
7.5
OPNsense is highly stable and reliable, excelling in security and usability, but occasionally faces VPN and update issues.
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
The stability of Azure Firewall is excellent.
DevOps Engineer at a tech vendor with 1,001-5,000 employees
For our use case, Azure Firewall is stable enough.
Technical Solution Architect at liwa
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
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.
Network and Programming Specialist at Twentytwo Integration
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
 

Room For Improvement

Fortinet FortiGate needs enhanced UI, simplified licensing, improved performance, reporting, third-party integration, and expanded automation features.
Azure Firewall needs improvements in security, usability, support, pricing, AI integration, and centralized management to match competitors.
OPNsense's challenges include interface usability, integration issues, and the need for improved VPN, analytics, and virtualization support.
When considering Sophos XG, which we also use, the logging and reporting functionality is notably more efficient.
Senior IT specialist at SAUDIA ALIRLINES
These sessions should be around five to ten minutes long, allowing users and partners to quickly grasp the information without disrupting their daily tasks.
Managing Director at a manufacturing company with 10,001+ employees
The solution should be able to implement machine learning and analytics of all the logs for threat detection and protection.
Senior Systems Engineer at Caribbean Development Company
If Azure Firewall can integrate identity features, it will help deliver additional next-generation capabilities.
Solutions Area Lead at a tech consulting company with 501-1,000 employees
Improvement in reporting and better visibility into network traffic would also be beneficial.
Cybersecurity Engineer at AXSYS
Azure Firewall could improve its reporting capabilities.
DevOps Engineer at a tech vendor 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
 

Setup Cost

Enterprise buyers find Fortinet FortiGate costly initially, but cheaper overall, despite some high renewal and setup costs.
Enterprise buyers view Azure Firewall's pricing as variable, with flexible pay-as-you-go costs and mixed opinions on affordability.
OPNsense is a cost-effective, open-source firewall solution offering affordability compared to commercial firewalls, appealing to enterprises.
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.
Network & System Admin at Invoke Studios
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 standard functionality for API Management is at a zero level, and then the next level is one.
Technical Solution Architect at liwa
Azure Firewall is quite expensive, with a high cost.
DevOps Engineer at a tech vendor with 1,001-5,000 employees
Azure Firewall is subscription-based, which is advantageous as there is no need for upfront payment.
Information Technology Architect at GMS INC
It is free.
Technical support engineer at ADVANT računalniški inženiring, komunikacije, svetovanje in distribucija d.o.o.
They use AI for packet inspection, which integrates with OPNsense and pfSense.
Network and Programming Specialist at Twentytwo Integration
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
 

Valuable Features

Fortinet FortiGate provides robust, flexible security solutions with key features like web filtering, SSL VPN, SD-WAN, and centralized management.
Azure Firewall offers comprehensive security, seamless integration, user-friendly management, and advanced features for modern security and compliance needs.
OPNsense is user-friendly and cost-effective, offering extensive VPN, firewall features, and easy scalability with strong community support.
These features help reduce our downtime, manage the ISPs, and deploy SLAs for all the website traffic.
Head IT at Burraq Cyber Security Solutions
The most valuable feature of FortiGate is FortiView which provides proactive monitoring.
General Manager Group IT at DART GLOBAL LOGISTICS PTE. LTD.
We got a firewall and gave an SSL VPN to my client to connect to their servers, after which, such kind of activities involving ransomware attacks stopped.
Owner at Mindware Computer Solutions
We have to combine multiple features and multiple products, and then we can say that this is more cost-effective and works properly to ensure the security posture of our cloud deployments.
Senior Manager, Information Security at NetSol Technologies Inc.
With Azure Firewall on the cloud, you just need to subscribe to the firewall, configure it, and it will help you protect your environment.
Technical Solution Architect at liwa
The premium version includes all traditional firewall features, reducing the need for separate compute resources.
DevOps Engineer at a tech vendor with 1,001-5,000 employees
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
 

Categories and Ranking

Fortinet FortiGate
Sponsored
Ranking in Firewalls
1st
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
580
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)
Azure Firewall
Ranking in Firewalls
12th
Average Rating
7.4
Reviews Sentiment
6.3
Number of Reviews
44
Ranking in other categories
Microsoft Security Suite (11th)
OPNsense
Ranking in Firewalls
3rd
Average Rating
8.2
Reviews Sentiment
6.6
Number of Reviews
44
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of December 2025, in the Firewalls category, the mindshare of Fortinet FortiGate is 19.1%, down from 20.3% compared to the previous year. The mindshare of Azure Firewall is 2.1%, up from 2.1% compared to the previous year. The mindshare of OPNsense is 11.5%, down from 13.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Firewalls Market Share Distribution
ProductMarket Share (%)
Fortinet FortiGate19.1%
OPNsense11.5%
Azure Firewall2.1%
Other67.3%
Firewalls
 

Featured Reviews

Vasu Gala - PeerSpot reviewer
Manager, Information Technology Operation/Presales at TechMonarch
A stable solution with an intuitive interface and quick customer service
I have been working with Fortinet FortiGate, WatchGuard, Sophos, and SonicWall. I'm not as comfortable with SonicWall because of their UI and limitations. I prefer Fortinet above all other options. When it comes to configuration, I am confident in my ability to handle various tasks, including creating policies such as firewall rules, web policies, and application policies. Additionally, I can configure VPNs and implement load balancing, among other tasks. Overall, I feel much more comfortable working with Fortinet. Fortinet has made significant improvements by integrating AI with firewalls for threat analysis and prevention. In the past 2-3 years, they have launched FortiSASE and SIEM, and they also provide SOC services. Both Palo Alto and Fortinet FortiGate are excellent. While Fortinet FortiGate comes at higher prices, the functionality and support justify the cost. They promptly resolve firmware issues and inform all support providers about configuration changes.
AD
Technical Solution Architect at liwa
Has enabled us to manage internal access securely but lacks accessible documentation for deeper integration
We haven't required any support, but overall, Microsoft support is good. Whenever we raise any concern, they are supporting us on time. Currently it is good. We are not a public-facing company; it is a retail company only, so that's why I don't think it is required. We don't have an e-commerce solution on Azure. For that, we are using a different stack for the e-commerce portal, so that is not in Azure. We are only using it for business applications, and I think L3 filtering in network security suffices for our problem currently. Regarding scalability for Azure Firewall, we don't need it here because the request to the application is internal. All are internal users. So there is not much request to get into the application, so scalability is not required for us in the current scenario.
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.
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Top Industries

By visitors reading reviews
Computer Software Company
14%
Comms Service Provider
9%
Manufacturing Company
8%
Financial Services Firm
6%
Computer Software Company
14%
Financial Services Firm
10%
Government
8%
Manufacturing Company
7%
Comms Service Provider
16%
Computer Software Company
15%
Manufacturing Company
6%
University
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business357
Midsize Enterprise132
Large Enterprise188
By reviewers
Company SizeCount
Small Business12
Midsize Enterprise12
Large Enterprise22
By reviewers
Company SizeCount
Small Business30
Midsize Enterprise5
Large Enterprise8
 

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 a better choice, Azure Firewall or Palo Alto Networks NG Firewalls?
Azure Firewall Vs. Palo Alto Network NG Firewalls Both solutions provide stellar stability and security. Azure Firew...
How does Azure Firewall compare with Palo Alto Networks VM Series?
Both products are very stable and easily scalable. The setup of Azure Firewall is easy and very user-friendly and the...
Which would you recommend - FortiGate VM or Azure Firewall?
Both of these solutions are excellent options that provide flexible scalability and solid security. Fortinet Fortigat...
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?
My experience with pricing, setup cost, and licensing is that since OPNsense is free, the licensing and setup was eas...
 

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
Information Not Available
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 Azure Firewall vs. OPNsense and other solutions. Updated: December 2025.
879,259 professionals have used our research since 2012.