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Azure Firewall vs OPNsense comparison

 

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
3.0
Azure Firewall provides cost-efficient security for small applications, with varied ROI experiences depending on organizational needs.
Sentiment score
3.0
Numerous users reported substantial financial savings and improved network security with OPNsense compared to alternatives like FortiGate or Sophos.
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
4.2
Azure Firewall support is generally satisfactory, though some suggest improvements in response time and mention occasional third-party reliance.
Sentiment score
5.3
OPNsense users mostly find community forums and documentation sufficient, though some express dissatisfaction with official support availability and cost.
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
6.4
Azure Firewall efficiently scales with traffic, supports global users, but larger enterprises seek further scaling improvements for extensive demands.
Sentiment score
6.8
OPNsense offers scalable and flexible network solutions, effectively supporting mid-sized to enterprise needs with appropriate hardware or virtualization.
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.
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
In theory, OPNsense can handle small home networks and even large enterprise environments if deployed on sufficiently powerful hardware or virtualized on a clustered system.
ISO 27001 Lead Implementer at a consultancy with 11-50 employees
 

Stability Issues

Sentiment score
8.5
Azure Firewall is praised for stability and reliability, with users noting high uptimes and positive comparisons to competitors.
Sentiment score
7.3
OPNsense is stable with occasional issues; praised for security and UI, performance varies with hardware and resource availability.
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
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
 

Room For Improvement

Azure Firewall needs improvements in security, usability, support, pricing, AI integration, and centralized management to match competitors.
OPNsense users face VPN setup issues, inadequate documentation, performance shortfalls, high pricing, and request better usability and features.
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
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
The documentation should be clearer because I faced some difficulties navigating many options.
ISO 27001 Lead Implementer at a consultancy with 11-50 employees
 

Setup Cost

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 solution for enterprises, reducing expenses compared to FortiGate and Palo Alto alternatives.
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
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
 

Valuable Features

Azure Firewall offers comprehensive security, seamless integration, user-friendly management, and advanced features for modern security and compliance needs.
OPNsense provides user-friendly configuration, robust security features, and adaptability, making it ideal for enterprise and IT network management.
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

Azure Firewall
Ranking in Firewalls
13th
Average Rating
7.6
Reviews Sentiment
6.3
Number of Reviews
44
Ranking in other categories
Microsoft Security Suite (10th)
OPNsense
Ranking in Firewalls
7th
Average Rating
8.2
Reviews Sentiment
6.6
Number of Reviews
47
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2026, in the Firewalls category, the mindshare of Azure Firewall is 2.7%, up from 2.1% compared to the previous year. The mindshare of OPNsense is 7.9%, down from 11.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Firewalls Mindshare Distribution
ProductMindshare (%)
OPNsense7.9%
Azure Firewall2.7%
Other89.4%
Firewalls
 

Featured Reviews

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
Financial Services Firm
11%
Computer Software Company
10%
Manufacturing Company
9%
Government
7%
Comms Service Provider
17%
Computer Software Company
9%
Manufacturing Company
8%
Outsourcing Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business12
Midsize Enterprise12
Large Enterprise22
By reviewers
Company SizeCount
Small Business32
Midsize Enterprise6
Large Enterprise8
 

Questions from the Community

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 Firewall is easy to use and provides excellent support. Valuable features include int...
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 overall cost is reasonable. Azure Firewall offers a solid threat awareness, can...
Which would you recommend - FortiGate VM or Azure Firewall?
Both of these solutions are excellent options that provide flexible scalability and solid security. Fortinet Fortigate VM integrates well and has excellent centralized reporting. It is very easy to...
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 client, Open VPN and client, and PPTP client. Both also have intrusion detection a...
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 enough. Open source license allows a beginner to have a complete firewall solution ...
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 is that sometimes the VPN route caches for some time and sometimes I want to cha...
 

Overview

 

Sample Customers

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: August 2026.
908,834 professionals have used our research since 2012.