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Fortinet FortiOS vs SonicWall TZ comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Jul 13, 2025

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
5.7
Organizations benefit financially and operationally with Fortinet FortiGate, citing savings, increased productivity, better security, and centralized management.
Sentiment score
8.0
Fortinet FortiOS offers competitive pricing, easy scalability, and reliable security, resulting in solid ROI and reduced upgrade costs.
Sentiment score
5.8
SonicWall TZ is favored by small businesses for its cost-effectiveness, security, and fast ROI within eight months.
Clients are now comfortable and not wasting productive hours on IT support.
The automation part is giving us a cost benefit and speed; we can react faster.
It's a very useful tool to mitigate and protect your enterprise.
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.
That is a reason to buy a firewall, and it is challenging to put a monetary value on security.
 

Customer Service

Sentiment score
6.4
Fortinet FortiGate's customer support is praised for knowledgeable staff but criticized for inconsistent responsiveness and varying service quality.
Sentiment score
7.8
Fortinet FortiOS support is helpful but inconsistent, with quick basic solutions, delays on complex issues, and documentation needing improvement.
Sentiment score
3.9
SonicWall TZ receives mixed reviews on customer service, with technical support praised but improved response times requested.
They offer very accurate solutions.
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.
I would rate the technical support for Fortinet FortiGate a ten out of ten.
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.
Customer service is excellent.
For support, I would rate SonicWall TZ five out of 10.
 

Scalability Issues

Sentiment score
7.0
Fortinet FortiGate is scalable, adaptable for business needs, but requires advanced planning to avoid hardware and licensing issues.
Sentiment score
8.6
Fortinet FortiOS offers scalable solutions for varying business sizes, though some hardware upgrades may be needed for expansion.
Sentiment score
7.1
SonicWall TZ suits small to mid-sized businesses but planning and model choice are key for extensive scalability.
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.
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.
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.
 

Stability Issues

Sentiment score
7.5
Fortinet FortiGate is praised for its stability and performance, though some models face issues with high traffic.
Sentiment score
7.5
Fortinet FortiOS is stable and reliable, outperforming alternatives, with any issues mainly due to configuration challenges.
Sentiment score
6.3
SonicWall TZ is praised for reliability and security, though occasional minor issues and update disruptions may occur.
We're experiencing 99.999% availability consistently.
I would rate the stability of Fortinet FortiGate a ten out of ten.
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.
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.
In terms of stability, SonicWall doesn't have performance issues.
SonicWall TZ rates 10 out of 10 for stability.
SonicWall TZ is definitely stable and offers a good value for money.
 

Room For Improvement

FortiGate needs improvements in interface stability, user experience, reporting, VPNs, licensing costs, documentation, performance, and support.
Fortinet FortiOS users want improved usability, better management, enhanced security features, and more efficient support, especially for 60D models.
SonicWall TZ needs interface, reporting, and support improvements, while high pricing and complex licensing affect user satisfaction.
Investing in a solution that can accommodate such growth would be more cost-effective than repeatedly purchasing new hardware.
While Fortinet claims to offer a comprehensive network solution, it falls short in addressing computer application issues, particularly server security.
When considering Sophos XG, which we also use, the logging and reporting functionality is notably more efficient.
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.
Integration with other vendors, especially with VPNs, can be challenging and requires more effort when configuring.
SonicWall TZ could benefit from newer technology.
The VPN license should be improved by providing more free SSL VPN licenses.
 

Setup Cost

Fortinet FortiGate is valued for cost-effectiveness, clear licensing, but renewal costs can vary compared to competitors.
Fortinet FortiOS pricing is moderate and scalable, with renewal costs potentially high despite competitive initial bundling offers.
SonicWall TZ's flexible pricing and upgrade promotions offer competitive, cost-effective solutions for small to medium enterprises despite setup costs.
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.
It is about 20% cheaper.
The advantages of Fortinet FortiGate over its competitors include good pricing and meeting our requirements at a lower cost.
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.
More licenses are required to purchase the perpetual license for SSL VPN and Global VPN.
When comparing similar products across vendors, there may be a small difference in cost.
I would also position its pricing as a three, where one is the lowest price and ten is the highest.
 

Valuable Features

Fortinet FortiGate is valued for its high-performance security features, ease of use, scalability, and cost-effectiveness.
Fortinet FortiOS offers ease of use, robust security features, scalability, and cost-effectiveness, ideal for large-scale deployments.
SonicWall TZ offers user-friendly configuration, robust security, VPN integration, remote access, and affordability, ideal for businesses.
In terms of security, we have not experienced any security flaws or loopholes, and it has proven to be quite stable.
FortiGate has helped reduce the risk of cyberattacks that might disrupt our client's production.
These features help reduce our downtime, manage the ISPs, and deploy SLAs for all the website traffic.
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.
For SMB segments, SonicWall performs well.
It was beneficial during COVID for remote work through its VPN functionality.
The advanced gateway security features such as web filter, application control filter, IPS, ideas, gateway antivirus, anti-spyware, and botnet filter are valuable.
 

Categories and Ranking

Fortinet FortiGate
Sponsored
Ranking in Firewalls
1st
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
411
Ranking in other categories
Software Defined WAN (SD-WAN) Solutions (1st), WAN Edge (1st)
Fortinet FortiOS
Ranking in Firewalls
22nd
Average Rating
8.4
Reviews Sentiment
8.0
Number of Reviews
81
Ranking in other categories
No ranking in other categories
SonicWall TZ
Ranking in Firewalls
19th
Average Rating
8.2
Reviews Sentiment
6.7
Number of Reviews
85
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of September 2025, in the Firewalls category, the mindshare of Fortinet FortiGate is 20.1%, up from 18.4% compared to the previous year. The mindshare of Fortinet FortiOS is 1.1%, up from 0.8% compared to the previous year. The mindshare of SonicWall TZ is 2.8%, up from 2.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Firewalls Market Share Distribution
ProductMarket Share (%)
Fortinet FortiGate20.1%
SonicWall TZ2.8%
Fortinet FortiOS1.1%
Other76.0%
Firewalls
 

Featured Reviews

Vasu Gala - PeerSpot reviewer
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.
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.
Subhadip Pakrashi - PeerSpot reviewer
Provides reliable performance with strong features and simplicity
SonicWall TZ is user-friendly, admin-friendly, and a beautiful product. I have been selling SonicWall since 2007 without any issues. SonicWall has been working on it excellently. They are up to date, and their research team is good, making the box feature-rich. Based out of India, I have had some issues with their faulty channel policy. It's a very good product, an awesome product for those who want to use SonicWall TZ. You can bet on it, but check out the channel policies in India. They should check out the channels in the channel business. It's just a precaution, nothing more than that. Overall rating: 9 out of 10.
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Top Industries

By visitors reading reviews
Computer Software Company
15%
Comms Service Provider
9%
Manufacturing Company
8%
Financial Services Firm
6%
Computer Software Company
13%
Manufacturing Company
9%
Financial Services Firm
8%
Government
7%
Computer Software Company
16%
Comms Service Provider
8%
Manufacturing Company
8%
Construction Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business261
Midsize Enterprise99
Large Enterprise143
By reviewers
Company SizeCount
Small Business42
Midsize Enterprise13
Large Enterprise23
By reviewers
Company SizeCount
Small Business60
Midsize Enterprise17
Large Enterprise14
 

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 ...
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.
Would you choose Fortinet Fortigate or Sonicwall TZ?
I’ll say it depends on your needs. Fortinet FortiGate and SonicWall TZ are both next-gen firewalls (NGFW) with simila...
What do you like most about SonicWall TZ?
The most valuable feature of SonicWall TZ is the double authentication, where it asks for one password and again asks...
What is your experience regarding pricing and costs for SonicWall TZ?
The price is normal. It is a nominal cost for an SMB TZ used for SMB businesses. However, more licenses are required ...
 

Also Known As

FortiGate 60b, FortiGate 60c, FortiGate 80c, FortiGate 50b, FortiGate 200b, FortiGate 110c, FortiGate, Fortinet Firewall
No data available
Dell SonicWALL TZ
 

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
AeroM_xico Delta TechOps, Unimat
Find out what your peers are saying about Fortinet FortiOS vs. SonicWall TZ and other solutions. Updated: September 2025.
867,349 professionals have used our research since 2012.