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Fortinet FortiOS 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
7.4
Fortinet FortiGate offers cost-efficient security, enhancing performance and network stability, while significantly reducing operational costs and incidents.
Sentiment score
8.0
Fortinet FortiOS offers scalability, ease of use, and competitive pricing, enhancing ROI despite borderline scenarios in some cases.
Sentiment score
2.5
User feedback praises OPNsense for its robust features, ease of use, cost savings, improved performance, and high reliability.
Clients are now comfortable and not wasting productive hours on IT support.
We have experienced a positive return on investment by utilizing Fortinet's products.
There's definitely an ROI. Having a centralized way of managing and applying policies across the entire organization always helps.
Once it is deployed, I do not have to revisit or replace the hardware.
The pricing of FortiOS is competitive and reasonable compared to other leading products such as Palo Alto and Check Point.
Fortinet is strong in terms of cost and compatibility with other vendors.
 

Customer Service

Sentiment score
7.0
Fortinet FortiGate support receives mixed reviews, praised for higher-level assistance but criticized for inconsistent technical support responsiveness.
Sentiment score
7.7
Fortinet FortiOS support is praised for responsiveness but criticized for slow responses and underqualified teams on complex issues.
Sentiment score
6.4
Users prefer OPNsense community forums for support, finding them accessible and effective, with official support being timely but less centralized.
He explained that it required a command line configuration, as it couldn't be done through the graphical user interface.
I would rate their support for FortiGate a nine out of ten.
They offer very accurate solutions.
I would rate them nine or ten out of ten.
Fortinet technical support is very responsive and helpful.
Support engineers sometimes lack eagerness to assist with issues such as the memory problem.
I mainly rely on community support since the solution is open source.
I've found all the answers I've needed so far via the forums.
They could improve the support.
 

Scalability Issues

Sentiment score
7.3
Fortinet FortiGate is scalable for enterprises, but expansion may require budget planning and careful pre-planning for integration.
Sentiment score
8.8
Fortinet FortiOS excels in scalability, supporting diverse environments and expansion, despite some hardware limitations requiring forward planning.
Sentiment score
6.5
OPNsense is scalable and adaptable, though not ideal for large enterprises; excels with diverse tasks and various deployment options.
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.
You can choose a cheaper model if you only have 20-30 users, but you will need to spend more money for a FortiGate solution that covers 5,000.
When customers' networks grow and needs expand, we can easily switch between models to trade up devices.
It allows for the expansion of users and devices without additional licensing costs.
Fortinet FortiOS is scalable, allowing the addition of users and firewalls as required.
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 reliable and stable, despite occasional issues under high traffic; model selection impacts performance.
Sentiment score
7.1
Fortinet FortiOS is praised for high stability, with rare issues quickly resolved, outperforming competitors like Cisco and SonicWall.
Sentiment score
8.5
OPNsense is stable and reliable, though some users report VPN issues and challenges with updates or extensive voice traffic.
Improper handling of these can lead to a memory surge, a well-known bug that can cause the entire system to freeze.
We have not had any problems with the operating systems or maintenance of subscriptions.
The solution is very stable.
While the product is largely stable, it sometimes faces memory issues in specific versions like 11 OE, which can be disruptive.
Stability is a seven out of ten because during version migrations, and sometimes with new versions, Fortinet is not as good.
I would rate the stability of FortiOS as an eight out of ten.
There are no bugs or glitches.
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.
 

Room For Improvement

Fortinet FortiGate needs improved UI stability, integration, performance, VPN functionality, support, and simplified policy management due to high costs.
Fortinet FortiOS needs enhanced VPN, hardware compatibility, reduced update size, improved GUI functionality, and better pricing and reporting tools.
OPNsense requires improvements in integration, user interface, documentation, technical support, and compatibility, particularly for VPNs and monitoring tools.
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.
Fortinet FortiOS faces memory issues, which can lead to unexpected downtimes.
There should be more documentation on how to use the CLI or how to perform CLI versions of tasks that can be done through the GUI.
Compared to other market leaders like Palo Alto and Check Point, FortiOS has many bugs in its initial releases.
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 is praised for its cost-effectiveness and flexible licensing, especially benefiting small to medium-sized businesses.
Fortinet FortiOS is cost-effective initially but pricier for renewals, suitable for mid-sized to large enterprises.
OPNsense is cost-effective due to its free software, with main costs from hardware and optional support.
Secure SD-WAN is free of charge.
The most expensive part is the renewal of the license subscription.
FortiGate is priced lower than Palo Alto.
It is an affordable solution for us.
Fortinet products are somewhat pricey, similar to Cisco equivalents, however, they have justified their price point.
I am satisfied with the pricing, licensing, and setup costs of FortiOS, rating it nine out of ten compared to other familiar leading firewalls.
It's a free solution.
I rate the price of OPNsense a five out of ten.
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.
 

Valuable Features

Fortinet FortiGate is a reliable, user-friendly security solution known for robust features, easy configuration, and competitive pricing.
Fortinet FortiOS is praised for user-friendly features, robust threat detection, and seamless integration, making it a top security choice.
OPNsense offers flexibility, strong security, user-friendly management, and open-source benefits with robust VPNs, integration, and frequent updates.
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.
It is user-friendly when it comes to turning on features, and it has been reliable and effective.
The threat intelligence in FortiOS is very high, and the system is scalable without additional licensing costs.
The solution offers good threat intelligence, which is crucial for our customers' security purposes.
The most valuable features include the basic firewall functionality and the GeoIP location services.
It's light and easy to manage.
The most valuable features of OPNsense are the GUI and frequent updates.
 

Categories and Ranking

Fortinet FortiGate
Sponsored
Ranking in Firewalls
2nd
Average Rating
8.4
Reviews Sentiment
7.2
Number of Reviews
330
Ranking in other categories
Software Defined WAN (SD-WAN) Solutions (1st), WAN Edge (1st)
Fortinet FortiOS
Ranking in Firewalls
17th
Average Rating
8.4
Reviews Sentiment
7.9
Number of Reviews
80
Ranking in other categories
No ranking in other categories
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 May 2025, in the Firewalls category, the mindshare of Fortinet FortiGate is 21.4%, up from 17.7% compared to the previous year. The mindshare of Fortinet FortiOS is 1.1%, up from 1.0% compared to the previous year. The mindshare of OPNsense is 11.5%, down from 17.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Firewalls
 

Featured Reviews

EhabAli - PeerSpot reviewer
Efficient, user-friendly, and affordable
In the past, NSS Labs was utilized to test files and verify the numbers and datasheets. It would be beneficial to have an organization or testing lab that can verify the numbers in our datasheets since changes are frequently made, which can be inconvenient for review. For instance, when comparing different competitors such as Forcepoint, Palo Alto, and Check Point, the throughput or numbers in the datasheet may be lower than the actual numbers. Conversely, Fortinet typically reports very high numbers, but they cannot be replicated in the real world. Therefore, it would be advantageous for them to partner with a neutral testing organization such as NSS Labs to validate these numbers, thus providing more credibility and comfort to everyone regarding the accuracy of the datasheets. For the migration, everyone has a firewall in use and I am selling Fortinet. Typically, I am replacing another firewall. Previously, there was a tool available to convert configurations from one firewall, such as Palo Alto, to Fortinet, but this tool is no longer free. If it could be made free again, it would be very beneficial. This tool shows a lot of promise and is very good. Making it free would help many companies deliver their products in a more efficient and integrated way. It would also be more valuable to include the tool with the firewall package or license instead of having to pay extra for it. Paying extra puts more pressure on small companies to deliver the firewall and complete the configuration, especially if they have hundreds or thousands of policies. It's very painful to move through these policies line by line. The stability has room for improvement. When it comes to Secure SD-WAN, everything is fine. They are going the right way. SD-WAN is very promising. They can provide the SD-WAN solution separately, but they will not take this approach because even the smallest firewall can support the features, so there is no need to have a separate service or appliance. They are following the right steps, and there is nothing to be improved. Feature-wise, I'm really satisfied with the new release, and the features they have added. For now, it's fine.
Harshama Silva - PeerSpot reviewer
We have improved network security with user-friendly controls and high threat intelligence
FortiOS is very user-friendly and easy to configure for L1, L2, and L3 personnel. Its web filtering, application control, and IPS features are very user-friendly, easy to manage, and deploy. The threat intelligence in FortiOS is very high, and the system is scalable without additional licensing costs. FortiOS allows us to expand the number of users and devices as our network needs grow.
Eddy Ramirez - PeerSpot reviewer
Good interface and firewall capabilities and overall easy to use
The security has improved as we can isolate the network. We can do attrition prevention via a tool that comes with the solution. We can have a VPN solution in place for those that work from home, outside the network, in a secure manner. We also like that it offers good authentication. It offers radius-based authentication, which has been useful for the company. The main platform is under the Open VPN firewall. The solution has high availability. When we have different ISPs, we can actually load balance those links or actually put some priority or even classify the traffic that might go into one ISP or another.
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Top Industries

By visitors reading reviews
Educational Organization
20%
Computer Software Company
14%
Comms Service Provider
7%
Manufacturing Company
6%
Computer Software Company
16%
Financial Services Firm
9%
Government
9%
Manufacturing Company
8%
Computer Software Company
16%
Comms Service Provider
13%
Government
7%
Educational Organization
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

Questions from the Community

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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 ...
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...
What do you like most about Fortinet FortiOS?
The SSL VPN is fee for use is most attractive.
What is your experience regarding pricing and costs for Fortinet FortiOS?
I rate the pricing for FortiOS as eight or nine out of ten. It is an affordable solution for us.
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?
I consider the pricing of OPNsense to be high when compared with other market products. However, as a free firewall p...
 

Also Known As

FortiGate 60b, FortiGate 60c, FortiGate 80c, FortiGate 50b, FortiGate 200b, FortiGate 110c, FortiGate, Fortinet 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
Black Gold Regional Schools, Amadeus Hospitality, Jefferson County, Chunghwa Telecom, City of Boroondara, Dimension Data
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 Fortinet FortiOS vs. OPNsense and other solutions. Updated: April 2025.
849,963 professionals have used our research since 2012.