Fortinet FortiGate-VM vs OPNsense comparison

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Fortinet FortiGate-VM

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Executive SummaryUpdated on Sep 16, 2024

Fortinet FortiGate-VM and OPNsense compete in the firewall solutions category. Fortinet FortiGate-VM appears to have the upper hand due to its superior threat detection and prevention capabilities.

Features: Fortinet FortiGate-VM offers advanced security features, integrated threat intelligence, and high performance under load. OPNsense provides flexible VPN options, effective traffic shaping, and extensive capabilities, making it cost-efficient.

Room for Improvement: Fortinet FortiGate-VM users suggest improvements in its configuration complexity, navigation system, and setup process. OPNsense could enhance its documentation, streamline updates, and improve its overall support material.

Ease of Deployment and Customer Service: Fortinet FortiGate-VM has a relatively smooth deployment process but requires initial training to leverage its full potential. OPNsense is known for straightforward installation and strong community support. Fortinet FortiGate-VM offers professional customer service, while OPNsense benefits from community resources providing a user-friendly experience.

Pricing and ROI: Fortinet FortiGate-VM users identify higher setup costs but acknowledge favorable ROI due to its premium features and reliable performance. OPNsense is well-regarded for its lower initial costs and high ROI, making it appealing for budget-conscious users seeking effective firewall solutions.

To learn more, read our detailed Fortinet FortiGate-VM vs. OPNsense Report (Updated: August 2026).

Fortinet FortiGate-VM vs. OPNsense

August 2026

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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

4.5

Fortinet FortiGate-VM offers cost-effective security, efficient threat handling, and seamless Microsoft AD integration, enhancing network reliability in Brazil.

Sentiment score

3.0

Numerous users reported substantial financial savings and improved network security with OPNsense compared to alternatives like FortiGate or Sophos.

I observed a fifty to sixty percent reduction in operational costs after migrating to FortiGate VM.

Rahool Sharma

Senior Network Consultant at Visionet Systems Inc.

They have a platform that organizes their networks and access effectively.

Pietro Di Blasi

Pre-Sales Analyst at a comms service provider with 51-200 employees

We haven't used MPLS for over five years now, and it was extremely beneficial to see the changes from MPLS to SD-WAN using Fortinet FortiGate.

reviewer2706363

Chief Technology Officer at a consultancy with 11-50 employees

For more quotes and insights, download the Fortinet FortiGate-VM report

The network attacks reduced by approximately 60% after using that, even without customizing the custom configuration yet.

Mahmoud Suleiman

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.

For more quotes and insights, download the OPNsense report

Administrator at a retailer with 10,001+ employees

Customer Service

Sentiment score

6.4

Fortinet FortiGate-VM's support is praised for responsiveness and expertise, though some note variability and inefficiency in complex cases.

Sentiment score

5.3

OPNsense users mostly find community forums and documentation sufficient, though some express dissatisfaction with official support availability and cost.

Their support is helpful and effective.

Rahool Sharma

Senior Network Consultant at Visionet Systems Inc.

The end-user support is delayed at levels L2 and L3.

reviewer1866795

Chief Executive Officer at a tech services company with 1-10 employees

They support us almost instantly.

Khushru_Mistry

Chief Technology Officer at GM Modular

For more quotes and insights, download the Fortinet FortiGate-VM report

Compared to some open-source projects with weak support, OPNsense stands out for having both a strong community and commercial backing options.

For more quotes and insights, download the OPNsense report

ISO 27001 Lead Implementer at a consultancy with 11-50 employees

I mainly rely on community support since the solution is open source.

Stephen Zoran

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.

Harry Fusser

Senior Solutions Engineer at a educational organization with 201-500 employees

Scalability Issues

Sentiment score

6.6

Fortinet FortiGate-VM is scalable and cost-effective, though some users encounter challenges with scalability and specific modules.

Sentiment score

6.8

OPNsense offers scalable and flexible network solutions, effectively supporting mid-sized to enterprise needs with appropriate hardware or virtualization.

Fortinet FortiGate-VM adapts effectively; for example, you have a limited number of VPN connections on VM01, accommodating around 1,000 remote users, and if the customer needs another endpoint, we can deploy VM02 and manage that transition effectively.

Samuel-Mottet

EMEA Enterprise Solutions Architect at a tech vendor with 1,001-5,000 employees

Scalability is well-supported, with the notable ability to implement features easily.

Ino Vitra

Assistant Operation Manger at IIJ Singapore

It can start with a single core and scale up to a 32-core license for a robust deployment.

reviewer1866795

Chief Executive Officer at a tech services company with 1-10 employees

For more quotes and insights, download the Fortinet FortiGate-VM report

I use Zenarmor, pinning it to one core for packet inspection, and the CPU performance seems very good.

Stephen Zoran

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.

Mahmoud Suleiman

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.

For more quotes and insights, download the OPNsense report

ISO 27001 Lead Implementer at a consultancy with 11-50 employees

Stability Issues

Sentiment score

6.6

Fortinet FortiGate-VM is highly stable with minimal bugs, consistently reliable performance, and improved high availability for network security.

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 Fortinet FortiGate is excellent.

Subhadip Pakrashi

CEO at Kapstone Technological Services LLP

The product has been very stable, based on my ten to eleven years of experience.

Ino Vitra

Assistant Operation Manger at IIJ Singapore

In the past couple of years, they started releasing numerous new features, and things have become somewhat unstable.

reviewer2706363

Chief Technology Officer at a consultancy with 11-50 employees

For more quotes and insights, download the Fortinet FortiGate-VM report

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.

For more quotes and insights, download the OPNsense report

Senior Network Engineer at a comms service provider with 11-50 employees

At the latest code level, I haven't experienced any crashes.

Stephen Zoran

Senior Client Solutions Architect at a tech services company with 1,001-5,000 employees

Room For Improvement

Fortinet FortiGate-VM needs simplification in activation, integration, interface, and support, with calls for enhancements in features and pricing.

OPNsense users face VPN setup issues, inadequate documentation, performance shortfalls, high pricing, and request better usability and features.

You should not look just at a data sheet, but also look at real tests in the field and load tests from companies who are making them.

reviewer2283873

Founder at a tech services company with 11-50 employees

The API needs better integration to match accounts and objects more effectively.

Rahool Sharma

Senior Network Consultant at Visionet Systems Inc.

Now, these features require separate products like FortiManager, FortiAnalyzer, and a FortiCloud subscription for reporting.

reviewer1866795

Chief Executive Officer at a tech services company with 1-10 employees

For more quotes and insights, download the Fortinet FortiGate-VM report

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.

For more quotes and insights, download the OPNsense report

ISO 27001 Lead Implementer at a consultancy with 11-50 employees

Setup Cost

Fortinet FortiGate-VM offers competitive pricing with flexible licensing, appealing to medium-large enterprises but challenging for smaller firms.

OPNsense is a cost-effective, open-source solution for enterprises, reducing expenses compared to FortiGate and Palo Alto alternatives.

The license for Fortinet FortiGate-VM costs 100K to 150K Philippine pesos per year for VM1 or VM2.

Sitti Ridzma Salahuddin

System Engineer at Trends and Technologies, Inc

I don't have this experience with Fortinet FortiGate-VM because my colleagues in Germany are reaching better prices than me.

Karel Ondracek

Network Administrator at THK Co Ltd

As long as there is competition, they go with 50% + discounts.

Ehab Ali

Senior Presales Consultant at a computer software company with 1,001-5,000 employees

For more quotes and insights, download the Fortinet FortiGate-VM report

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.

For more quotes and insights, download the OPNsense report

Administrator at a retailer with 10,001+ employees

Valuable Features

Fortinet FortiGate-VM combines strong security, ease of use, scalability, and affordability with advanced threat detection and centralized management.

OPNsense provides user-friendly configuration, robust security features, and adaptability, making it ideal for enterprise and IT network management.

The more integrated we become, the less we spend on solving bugs and issues, allowing us to reduce time focusing on understanding and improving our network.

Pietro Di Blasi

Pre-Sales Analyst at a comms service provider with 51-200 employees

Fortinet is the only provider to have successfully set up a unified operating system on all its products in the network security ecosystem.

reviewer2742447

System Administrator, Security Engineer, Security Result at a tech vendor with 201-500 employees

For what we need to do, which is setting up a VPN connection between both sides and using it for SSL VPN connections for remote users, it works effectively and we haven't encountered vulnerabilities.

Samuel-Mottet

EMEA Enterprise Solutions Architect at a tech vendor with 1,001-5,000 employees

For more quotes and insights, download the Fortinet FortiGate-VM report

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.

For more quotes and insights, download the OPNsense report

ISO 27001 Lead Implementer at a consultancy with 11-50 employees

Categories and Ranking

Fortinet FortiGate-VM

Ranking in Firewalls

11th

Average Rating

8.4

Reviews Sentiment

6.7

Number of Reviews

151

Ranking in other categories

No ranking in other categories

OPNsense

Ranking in Firewalls

7th

Average Rating

8.2

Reviews Sentiment

6.6

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of August 2026, in the Firewalls category, the mindshare of Fortinet FortiGate-VM is 2.2%, up from 1.8% 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
Product	Mindshare (%)
OPNsense	7.9%
Fortinet FortiGate-VM	2.2%
Other	89.9%

Firewalls

Featured Reviews

Ehab Ali

Senior Presales Consultant at a computer software company with 1,001-5,000 employees

Unified security fabric has simplified multi-country deployments and strengthened threat response

FortiGate VM delivers exceptional performance and security with no degradation of service or protection (same features as the HW option). As part of the Fortinet Security Fabric, it extends across clouds and distributed locations, mitigating blind spots in virtual infrastructures. FortiGate VM can be rapidly deployed, managed through a centralized platform, and offers a range of purchasing options to suit every need. Also, FortiGate VM offers versatile deployment options across both public and private clouds, supporting all major public clouds including AWS, Azure, and Google as well as most hypervisors such as VMware, Hyper-V, and KVM. These deployments enable organizations to create scalable, high-performance firewalls that can be tailored to different virtualized environments and hyper-scale public cloud infrastructures. FortiGate VM integrates seamlessly with various infrastructure as code (IaC) tools such as Jenkins and GitLab, supporting security as code practices.

Read full review

Has helped simulate enterprise security setups and strengthens network segmentation practices

ISO 27001 Lead Implementer at a consultancy with 11-50 employees

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.

Read full review

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Top Industries

By visitors reading reviews

Financial Services Firm

Construction Company

Computer Software Company

Comms Service Provider

18%

Computer Software Company

Manufacturing Company

Outsourcing Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	74
Midsize Enterprise	35
Large Enterprise	43

By reviewers
Company Size	Count
Small Business	32
Midsize Enterprise	6
Large Enterprise	8

Questions from the Community

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...

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 your experience regarding pricing and costs for Fortinet FortiGate-VM?

Regarding pricing, setup cost, and licensing, the main client I deal with is a reputed company in the market, making it easy for them to afford Fortinet FortiGate-VM compared to Palo Alto, which is...

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...

Azure Firewall vs Fortinet FortiGate-VM

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Compared 49% of the time

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Compared 5% of the time

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Product Reports

Download Fortinet FortiGate-VM product report

Fortinet FortiGate-VM

August 2026

Download OPNsense product report

July 2026

Also Known As

FortiGate Virtual Appliance, FortiGate-VM

No data available

Overview

Fortinet FortiGate-VM delivers robust security services and advanced network management suitable for cloud environments, providing solutions like firewall and SD-WAN, with seamless integration across Fortinet devices.

FortiGate-VM is designed for enterprise security, offering comprehensive features like intrusion prevention and application filtering. It's known for its scalability and flexibility, supporting cloud platforms such as Azure and AWS. It enhances threat response and network management efficiency, thanks to real-time threat response, intuitive integration with existing systems, and cost-effectiveness.

What are the key features of Fortinet FortiGate-VM?

Strong Security: Offers firewall, intrusion prevention, and application filtering.
SD-WAN Capability: Improves network connectivity and performance.
Scalability: Efficient scaling in cloud environments.
Integration: Seamlessly connects with other Fortinet devices.

What benefits can users expect from Fortinet FortiGate-VM?

Enhanced Network Management: Simplifies deployment with real-time threat response.
Cost-Effectiveness: Optimal for managing network protocols at reasonable costs.
Flexibility in Deployment: Suitable for secure virtual machine operations on platforms like Azure or AWS.

Fortinet FortiGate-VM is predominantly employed in industries requiring stringent data center security, enabling network segmentation and VPN services. It's particularly favored by organizations using virtual and cloud networks due to its Unified Threat Management capabilities, making it an efficient solution for protecting virtual environments from threats.

Fortinet

OPNsense is an adaptable open-source firewall and routing platform appreciated for its flexibility, scalability, and user-friendly interface. It is equipped with robust security features and offers excellent reporting and visibility, essential for small businesses and home setups.

OPNsense stands out for its modular design, allowing cost-effective customization. This system supports VPNs and various firewall capabilities, making it suitable for securing networks from malicious traffic. Its frequent updates and extensive documentation, combined with a supportive online community, enhance user experience. However, there is room for improvement in integration with virtual servers and Azure. Scalability and hardware updates are important for large-scale environments, and users desire more reliable VPN solutions and enhanced threat intelligence tools.

What are OPNsense's most important features?

Flexibility: Easily customizable due to its open-source nature.
Robust Security: Advanced security features for network protection.
User-Friendly Interface: Simplified management and configuration.
Frequent Updates: Regular improvements and new features.
Dense Documentation: Extensive resources and community support.

What benefits should users look for in reviews?

Cost-Effectiveness: Open-source design reduces costs.
Scalability: Ability to grow with business needs.
Customizability: Tailored solutions for different requirements.
Community Support: Access to a strong network of resources and peers.

OPNsense is implemented in industries requiring VPN and firewall functions, supporting site-to-site connections, protecting servers, and managing commercial network traffic. Companies apply it for security, UTM, SD-WAN, content filtering, intrusion detection, and prevention, utilizing its open-source nature and effectiveness as a next-generation firewall.

Sample Customers

Security7 Networks, COOPENAE

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.