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OPNsense vs SonicWall NSa 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
3.8
OPNsense offers quick ROI, annual savings, improved network protection, efficiency, but faces challenges like market disruptions and cyber threats.
Sentiment score
6.0
SonicWall NSa enhances efficiency and security, reducing costs for organizations, saving nearly ten lakh rupees annually.
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
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
We had budgeted about thirty lakhs, but after negotiating with SonicWall NSa, we saved almost ten lakh rupees in a year.
Sr.Engineer at InterGlobe Technology Quotient
 

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
4.9
Users often solve issues using online resources, valuing community help, but suggest OPNsense centralize and improve support options.
Sentiment score
8.5
SonicWall NSa customer support is praised for expertise but needs improvement in response times and accessibility.
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
SonicWall support is always available to help us on an immediate basis.
Sr.Engineer at InterGlobe Technology Quotient
The support from SonicWall was excellent.
Channel Account Manager at a tech services company with 1,001-5,000 employees
SonicWall support is very helpful and responsive.
Product manger at Asbis Mediteranean
 

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
6.6
OPNsense is scalable and adaptable, supporting small to large deployments with flexibility in hardware upgrades and virtual machines.
Sentiment score
6.7
SonicWall NSa provides scalable options for various company sizes, though some upgrades may be necessary to meet demands.
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
I would rate its scalability around eight out of ten, meaning there are no issues, and it is pretty easy to scale.
Channel Account Manager at a tech services company with 1,001-5,000 employees
Regarding scalability, it's important to ascertain the customer's future requirements, as firewalls need to be sized according to their expected scalability, such as moving from 500 users today to more in the coming years.
CEO at Kapstone Technological Services LLP
SonicWall NSa is very supportive and capable of handling everything from smaller organizations to big enterprise-level organizations on a model-wise or configuration-wise basis.
Sr.Engineer at InterGlobe Technology Quotient
 

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
7.5
OPNsense is highly stable and reliable, excelling in security and usability, but occasionally faces VPN and update issues.
Sentiment score
7.9
SonicWall NSa is stable and reliable, though some firmware and configuration issues require occasional technical support.
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
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
Configuration changes have been made that have reduced that latency.
Sr.Engineer at InterGlobe Technology Quotient
The stability of SonicWall NSA is quite good.
Channel Account Manager at a tech services company with 1,001-5,000 employees
 

Room For Improvement

Fortinet FortiGate needs enhanced UI, simplified licensing, improved performance, reporting, third-party integration, and expanded automation features.
OPNsense's challenges include interface usability, integration issues, and the need for improved VPN, analytics, and virtualization support.
SonicWall NSa faces challenges with its GUI, VPN, outdated technology, pricey nature, and support responsiveness, requiring enhancements.
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
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
More details in the analytical tools offered would be appreciated since it is not yet mature.
Channel Account Manager at a tech services company with 1,001-5,000 employees
At those times, the CPU spikes considerably, and due to that, the firewall response becomes slow.
Sr.Engineer at InterGlobe Technology Quotient
There are some aspects of the dashboard configuration or customization that could be improved.
Product manger at Asbis Mediteranean
 

Setup Cost

Enterprise buyers find Fortinet FortiGate costly initially, but cheaper overall, despite some high renewal and setup costs.
OPNsense is a cost-effective, open-source firewall solution offering affordability compared to commercial firewalls, appealing to enterprises.
SonicWall NSa offers competitive pricing and value; however, advanced feature fees may challenge companies with tight IT budgets.
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
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
SonicWall is much cheaper compared to Fortinet, particularly regarding renewal and licensing costs.
Channel Account Manager at a tech services company with 1,001-5,000 employees
I would rate the price of the product as seven out of ten.
Product manger at Asbis Mediteranean
 

Valuable Features

Fortinet FortiGate provides robust, flexible security solutions with key features like web filtering, SSL VPN, SD-WAN, and centralized management.
OPNsense is user-friendly and cost-effective, offering extensive VPN, firewall features, and easy scalability with strong community support.
SonicWall NSa features VPN, deep inspection, user-friendly interface, threat protection, and scalable security for enhanced network protection.
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
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
Real-time deep memory inspection is very helpful and has had a positive impact on our security posture.
Channel Account Manager at a tech services company with 1,001-5,000 employees
SonicWall NSA's most valuable features are its SD-WAN and a system RTBI that blocks all attacks.
Product manger at Asbis Mediteranean
We were the only organization that remained secure with a zero infection rate.
Sr.Engineer at InterGlobe Technology Quotient
 

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)
OPNsense
Ranking in Firewalls
4th
Average Rating
8.2
Reviews Sentiment
6.6
Number of Reviews
44
Ranking in other categories
No ranking in other categories
SonicWall NSa
Ranking in Firewalls
15th
Average Rating
7.8
Reviews Sentiment
7.1
Number of Reviews
89
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of January 2026, in the Firewalls category, the mindshare of Fortinet FortiGate is 18.7%, down from 20.5% compared to the previous year. The mindshare of OPNsense is 11.2%, down from 13.0% compared to the previous year. The mindshare of SonicWall NSa is 1.7%, up from 1.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Firewalls Market Share Distribution
ProductMarket Share (%)
Fortinet FortiGate18.7%
OPNsense11.2%
SonicWall NSa1.7%
Other68.4%
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.
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.
Mahendra Basera - PeerSpot reviewer
Sr.Engineer at InterGlobe Technology Quotient
Automated breach prevention has protected critical workloads and keeps external attacks blocked
I am familiar with SonicWall TZ. I have done a POC of TZ but I have not worked extensively with it. I have worked with the 2600 firewall and then the 3600. These are the models which we have worked with.SonicWall NSa was an on-premises solution. The two firewalls which were in production, in the data center and on the LAN side, were both on-premises solutions. We had a pre-decided budget under which we would purchase the firewall. All parameters including security, high availability, and budget concerns were covered with SonicWall NSa being implemented at that time. SonicWall NSa is a user-friendly product that is easy to configure, and it is easy for network personnel and firewall administrators to work with. Even the L1 team captured and learned this firewall effectively, helping us resolve all parameters related to high availability firewalls within budget-friendly costs. I rate this review a nine out of ten.
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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%
Comms Service Provider
16%
Computer Software Company
15%
Manufacturing Company
6%
University
6%
Computer Software Company
11%
Manufacturing Company
9%
Educational Organization
8%
Comms Service Provider
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business357
Midsize Enterprise133
Large Enterprise188
By reviewers
Company SizeCount
Small Business30
Midsize Enterprise5
Large Enterprise8
By reviewers
Company SizeCount
Small Business54
Midsize Enterprise22
Large Enterprise24
 

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 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...
What do you like most about SonicWall NSa?
The product blocks access when I visit unrecognized websites.
What is your experience regarding pricing and costs for SonicWall NSa?
I would rate the price of the product as seven out of ten.
What needs improvement with SonicWall NSa?
I have not really seen any problems with SonicWall NSa on the technical front, but the quality of support is not that...
 

Comparisons

 

Also Known As

Fortinet FortiGate Next-Generation Firewall
No data available
NSA 250M, NSA 2600, NSA 3600, NSA 4600, NSA 5600, Dell SonicWALL NSA
 

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.
Orange County Rescue Mission, First Source, Michaels & Taylor, Green Clinic Health System, Aspire Chiltern Skills and Enterprise Centre, UnitedStack, Faith Lutheran College Redlands, Celtic Manor Resort, Star Kay White, Air Works, Unimat Life, NHS Yorkshire and Humber Commissioning Support (YHCS), Hutt City Council, Mato Grosso do Sul, Nspyre
Find out what your peers are saying about OPNsense vs. SonicWall NSa and other solutions. Updated: December 2025.
879,425 professionals have used our research since 2012.