--- title: FortiOS Reviews meta\_title: 'FortiOS Reviews 2026: Details, Pricing, & Features | G2' meta\_description: Filter 51 reviews by the users' company size, role or industry to find out how FortiOS works for a business like yours. aggregate\_rating: rating\_value: 4.3 review\_count: 51 scale: '5' date\_modified: '2026-08-07' parent\_category: name: IT Infrastructure url: https://www.g2.com/categories/it-infrastructure ---

### FortiOS Pros and Cons: Top 5 Advantages and Disadvantages

#### Quick AI Summary Based on G2 Reviews

Generated from real user reviews

Users value the **ease of use** of FortiOS, appreciating its intuitive interface and seamless multi-device functionality. [(8 mentions)](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2024346&qs=pros-and-cons#reviews)

Users value the **easy management** of FortiOS, praising its straightforward setup and monitoring capabilities for FortiAPs. [(4 mentions)](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2174092&qs=pros-and-cons#reviews)

Users praise FortiOS for its **robust security features** , ensuring fast transactions while preventing advanced threats and maintaining compliance. [(4 mentions)](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2306149&qs=pros-and-cons#reviews)

Users praise FortiOS for its **comprehensive security functions** that ensure safe transactions and seamless integration with Fortinet products. [(4 mentions)](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2390114&qs=pros-and-cons#reviews)

Users find FortiOS to be **user-friendly** , highlighting its easy installation and intuitive interface across devices. [(4 mentions)](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2101251&qs=pros-and-cons#reviews)

Users find FortiOS's **unfriendly interface** challenging, often requiring a switch to CLI for better usability. [(3 mentions)](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2306156&qs=pros-and-cons#reviews)

Users find the **command line interface necessary** for advanced settings, as the GUI can be unintuitive. [(2 mentions)](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2024340&qs=pros-and-cons#reviews)

Users face **integration issues** with FortiOS, finding it challenging to connect with third-party solutions effectively. [(2 mentions)](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2390107&qs=pros-and-cons#reviews)

Users point out the need for **better security** and cloud integration in FortiOS, citing serious vulnerabilities. [(2 mentions)](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2390108&qs=pros-and-cons#reviews)

Users find the **high cost** and licensing complexities challenging for adopting FortiOS effectively. [(1 mentions)](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2432526&qs=pros-and-cons#reviews)

### 5 Pros or Advantages of FortiOS

##### 1. Ease of Use

Users value the **ease of use** of FortiOS, appreciating its intuitive interface and seamless multi-device functionality.
[
See 8 mentions
](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2024346&qs=pros-and-cons#reviews)

See Related User Reviews

 ![Verified User](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User")
A

Verified User

Mid-Market (51-1000 emp.)

4.0/5

"FortiOS"

What do you like about FortiOS?

The user interface is easy to understand, and everything is easy to find.

 ![Verified User](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User")
U

Verified User

Mid-Market (51-1000 emp.)

3.5/5

"Simple Unified Platform for Network Security"

What do you like about FortiOS?

I like that all the security functions are in one place, and in a way that is familiar for software developers. I've had no performance issues, and fo

##### 2. Easy Management

Users value the **easy management** of FortiOS, praising its straightforward setup and monitoring capabilities for FortiAPs.
[
See 4 mentions
](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2174092&qs=pros-and-cons#reviews)

See Related User Reviews

 ![Nisar A.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Nisar A.")
NA

Nisar A.

Mid-Market (51-1000 emp.)

4.0/5

"Unified Dashboard Makes Management Effortless"

What do you like about FortiOS?

FortiOS brings together all Fortinet products into a single, unified dashboard, making it easy to manage all settings from one place.

 ![Rick J.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Rick J.")
RJ

Rick J.

Mid-Market (51-1000 emp.)

4.5/5

"FortiOS is great for our network."

What do you like about FortiOS?

What I appreciate most about FortiOS is how convenient it makes it for me to set up, monitor, and modify my FortiAPs and how easy it was to integrate

##### 3. Security Features

Users praise FortiOS for its **robust security features** , ensuring fast transactions while preventing advanced threats and maintaining compliance.
[
See 4 mentions
](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2306149&qs=pros-and-cons#reviews)

See Related User Reviews

 ![Verified User](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User")
G

Verified User

Enterprise (\> 1000 emp.)

5.0/5

"FortiOS: Secure Transactions Without Compromising Speed"

What do you like about FortiOS?

I appreciate that FortiOS makes transactions safe and fast, with almost zero delays. It prevents advanced threats and keeps us PCI DSS compliant witho

 ![Amar K.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Amar K.")
AK

Amar K.

Mid-Market (51-1000 emp.)

5.0/5

"Unmatched Reliability and Efficiency with FortiOS"

What do you like about FortiOS?

FortiOS stands out as the most reliable and efficient firewall operating system I have used, thanks to its unified security features, consistent perfo

##### 4. Security/Safety

Users praise FortiOS for its **comprehensive security functions** that ensure safe transactions and seamless integration with Fortinet products.
[
See 4 mentions
](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2390114&qs=pros-and-cons#reviews)

See Related User Reviews

 ![Verified User](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User")
U

Verified User

Mid-Market (51-1000 emp.)

3.5/5

"Simple Unified Platform for Network Security"

What do you like about FortiOS?

I like that all the security functions are in one place, and in a way that is familiar for software developers. I've had no performance issues, and fo

 ![Verified User](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User")
G

Verified User

Enterprise (\> 1000 emp.)

5.0/5

"FortiOS: Secure Transactions Without Compromising Speed"

What do you like about FortiOS?

I appreciate that FortiOS makes transactions safe and fast, with almost zero delays. It prevents advanced threats and keeps us PCI DSS compliant witho

##### 5. User-Friendly

Users find FortiOS to be **user-friendly** , highlighting its easy installation and intuitive interface across devices.
[
See 4 mentions
](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2101251&qs=pros-and-cons#reviews)

See Related User Reviews

 ![Jossy V.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Jossy V.")
JV

Jossy V.

Mid-Market (51-1000 emp.)

4.0/5

"Comprehensive Fabric Integration with an Intuitive, User-Friendly Interface"

What do you like about FortiOS?

The software offers comprehensive fabric integration and features an intuitive GUI, making it easy to use and efficient for my needs.

 ![Amar K.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Amar K.")
AK

Amar K.

Mid-Market (51-1000 emp.)

5.0/5

"Unmatched Reliability and Efficiency with FortiOS"

What do you like about FortiOS?

FortiOS stands out as the most reliable and efficient firewall operating system I have used, thanks to its unified security features, consistent perfo

### 5 Cons or Disadvantages of FortiOS

##### 1. Unfriendly Interface

Users find FortiOS's **unfriendly interface** challenging, often requiring a switch to CLI for better usability.
[
See 3 mentions
](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2306156&qs=pros-and-cons#reviews)

See Related User Reviews

 ![Nikunj K.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Nikunj K.")
NK

Nikunj K.

Mid-Market (51-1000 emp.)

4.5/5

"Fortios experience"

What do you dislike about FortiOS?

The terminal window is not very intuitive to use. I believe Fortisos should consider making it more dynamic. However, I understand that since the focu

 ![Amar K.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Amar K.")
AK

Amar K.

Mid-Market (51-1000 emp.)

5.0/5

"Unmatched Reliability and Efficiency with FortiOS"

What do you dislike about FortiOS?

Some settings in the GUI are not very intuitive, and to access the full range of features, I sometimes have to switch to the CLI for greater control.

##### 2. Command Line

Users find the **command line interface necessary** for advanced settings, as the GUI can be unintuitive.
[
See 2 mentions
](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2024340&qs=pros-and-cons#reviews)

See Related User Reviews

 ![Amar K.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Amar K.")
AK

Amar K.

Mid-Market (51-1000 emp.)

5.0/5

"Unmatched Reliability and Efficiency with FortiOS"

What do you dislike about FortiOS?

Some settings in the GUI are not very intuitive, and to access the full range of features, I sometimes have to switch to the CLI for greater control.

JS

Jose S.

Mid-Market (51-1000 emp.)

5.0/5

"Best User - Friendly Security Features"

What do you dislike about FortiOS?

- Some advanced settings you must to do it on CLI - The logs are not easy to understand at first glance

##### 3. Integration Issues

Users face **integration issues** with FortiOS, finding it challenging to connect with third-party solutions effectively.
[
See 2 mentions
](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2390107&qs=pros-and-cons#reviews)

See Related User Reviews

 ![Verified User](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User")
U

Verified User

Mid-Market (51-1000 emp.)

3.5/5

"Simple Unified Platform for Network Security"

What do you dislike about FortiOS?

I think licensing and cost are some complexities to adoption, but I didn't directly deal with this. It's also proprietary software so it's less easy t

 ![Jeffrey K.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Jeffrey K.")
JK

Jeffrey K.

Small-Business (50 or fewer emp.)

5.0/5

"Continuous Updates and Top-Notch Cyber Threat Protection"

What do you dislike about FortiOS?

THERE IS A NEED FOR BETTER SECURITY AND CLOUD INTEGRATION.

##### 4. Security Issues

Users point out the need for **better security** and cloud integration in FortiOS, citing serious vulnerabilities.
[
See 2 mentions
](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2390108&qs=pros-and-cons#reviews)

See Related User Reviews

 ![Jeffrey K.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Jeffrey K.")
JK

Jeffrey K.

Small-Business (50 or fewer emp.)

5.0/5

"Continuous Updates and Top-Notch Cyber Threat Protection"

What do you dislike about FortiOS?

THERE IS A NEED FOR BETTER SECURITY AND CLOUD INTEGRATION.

 ![Jossy V.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Jossy V.")
JV

Jossy V.

Mid-Market (51-1000 emp.)

4.0/5

"Comprehensive Fabric Integration with an Intuitive, User-Friendly Interface"

What do you dislike about FortiOS?

There are serious security vulnerabilities and problems with FortiClient that need to be addressed.

##### 5. High Cost

Users find the **high cost** and licensing complexities challenging for adopting FortiOS effectively.
[
See 1 mentions
](https://www.g2.com/products/fortios/reviews?filters%5Bsentiment_snippet%5D=2432526&qs=pros-and-cons#reviews)

See Related User Reviews

 ![Verified User](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User")
U

Verified User

Mid-Market (51-1000 emp.)

3.5/5

"Simple Unified Platform for Network Security"

What do you dislike about FortiOS?

I think licensing and cost are some complexities to adoption, but I didn't directly deal with this. It's also proprietary software so it's less easy t

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 ![Javier C.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Javier C.")
JC

Javier C.

Full Stack developer

Education Management

Mid-Market (51-1000 emp.)

6/8/2026

"All-in-One Networking & Cybersecurity Platform That Strengthens Architecture."

5/5

What do you like best about FortiOS?

It works good about the security and devices combines networking and cybersecurity functions into one, and that is so useful because now you have it on a platform, without any problem, it can help for a better architecture. Review collected by and hosted on G2.com.

What do you dislike about FortiOS?

Well, the cost is a little high; however, the complex upgrades will take you to a learning curve to use it, and the use of the feature to explore and use it will take some time to explore all the potential of this tool. because it is not so easy to use. Review collected by and hosted on G2.com.

What problems is FortiOS solving and how is that benefiting you?

The security includes SSL, URL filters and application control to monitor the security, to maintain inspection always. So you do not have to worry about it. Review collected by and hosted on G2.com.

Show More

Our network of Icons are G2 members who are recognized for their outstanding contributions and commitment to helping others through their expertise.G2 IconCurrent UserValidated ReviewerSource: G2 invite

 ![Verified User in Computer & Network Security](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User in Computer & Network Security")
AC

Verified User in Computer & Network Security

Small-Business (50 or fewer emp.)

6/6/2026

"FortiOS Delivers Strong Visibility, Control, and Stable Day-to-Day Security"

4.5/5

What do you like best about FortiOS?

What I like best about FortiOS is the visibility and control it provides over network traffic. In our FortiGate 70G deployment, features such as IPS, web filtering, application control, and VPN management are all available through a single interface. Policy management is straightforward, and the real-time logs are useful for troubleshooting and monitoring security events. The platform has been stable and performs well for our day-to-day security operations. Review collected by and hosted on G2.com.

What do you dislike about FortiOS?

What I dislike about FortiOS is that some advanced configurations require CLI access and can have a learning curve for administrators who are new to the platform. During firmware upgrades, we also spend extra time reviewing release notes and compatibility considerations before deployment. In addition, certain troubleshooting scenarios can involve navigating multiple menus and logs before identifying the root cause. Review collected by and hosted on G2.com.

What problems is FortiOS solving and how is that benefiting you?

FortiOS is helping us secure internet-facing services, manage VPN connectivity, and enforce security policies from a central platform. In our FortiGate 70G deployment, it provides visibility into network traffic and helps identify unwanted or risky activity through features such as IPS and web filtering. This has improved our security posture while reducing the effort required to manage multiple standalone security tools. The centralized management approach also makes day-to-day administration more efficient. Review collected by and hosted on G2.com.

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Current UserValidated ReviewerSource: G2 invite

 ![Daniel D.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Daniel D.")
DD

Daniel D.

Global Director of Technology

Mid-Market (51-1000 emp.)

4/21/2026

"Intuitive Single-Pane Management with Powerful Native ZTNA and Secure SD-WAN"

4.5/5

What do you like best about FortiOS?

Beyond performance, the platform is highly valued for its intuitive management and native feature set. It simplifies administrative workflows through a centralized "single-pane-of-glass" interface, ensuring consistent policy enforcement across the entire infrastructure. Unlike many competitors that require add-on licenses for basic modern networking, FortiOS includes advanced capabilities like Zero-Trust Network Access (ZTNA) and Secure SD-WAN natively. This holistic approach not only strengthens an organization's security posture against emerging threats—including post-quantum risks—but also provides a superior performance-to-cost ratio by consolidating multiple point products into one efficient ecosystem. Review collected by and hosted on G2.com.

What do you dislike about FortiOS?

A common point of frustration involves software stability and the update cycle. In the push to lead the market with new features like AI-driven security and SD-WAN, earlier releases of major firmware versions have been known to carry bugs that can affect production environments. This often forces IT teams to wait for several "patch releases" before upgrading, leading to a cautious and sometimes tedious lifecycle management process. Furthermore, while the performance is exceptional when using Fortinet’s proprietary hardware, the licensing model and the cost of maintaining the various security subscriptions (like FortiGuard services) can scale quickly, making it a significant ongoing investment for smaller organizations. Review collected by and hosted on G2.com.

What problems is FortiOS solving and how is that benefiting you?

FortiOS addresses the significant challenge of infrastructure fragmentation by consolidating disparate security and networking functions into a single, unified operating system. In modern environments where managing separate tools for firewalls, SD-WAN, and zero-trust access often leads to visibility gaps and "console fatigue," this platform provides a centralized management framework. By streamlining these services, it allows for more consistent policy enforcement across the entire network, ensuring that security protocols are identical whether data is moving through a local branch or a complex cloud environment. Review collected by and hosted on G2.com.

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Validated ReviewerSource: Organic Review from User Profile

DN

Dilhang N.

Cyber Security Engineer

Information Technology and Services

Mid-Market (51-1000 emp.)

5/6/2026

"FortiOS: User-Friendly GUI, Easy Deployment, and Reliable Performance"

4.5/5

What do you like best about FortiOS?

I have almost four years of experience with FortiOS, and the best thing about it is its GUI, which is very user-friendly and easy to use. Compared to other firewalls, it’s straightforward to deploy, administer, and configure. Overall, it’s a very reliable firewall. Review collected by and hosted on G2.com.

What do you dislike about FortiOS?

Frequently vulnerabilities arises, so you end up needing to upgrade the firewall. The hardest part is finding a stable version to upgrade to. Review collected by and hosted on G2.com.

What problems is FortiOS solving and how is that benefiting you?

Since the frequent vulnerabilities were related to the SSL VPN, they removed the SSL VPN and replaced it with ZTNA or an IPSEC VPN. Review collected by and hosted on G2.com.

Show More

Current UserValidated ReviewerSource: Organic

RK

Ratish K.

System Administrator

Mid-Market (51-1000 emp.)

3/12/2026

"FortiOS: Unified Security Fabric with High Performance and Rich Features"

5/5

What do you like best about FortiOS?

The standout thing about FortiOS is how unified it is. It ties together networking, security, and management in one operating system, which makes Fortinet’s devices feel more cohesive than many competitors’.

Here are a few highlights most people appreciate:

Integrated Security Fabric: It connects firewalls, switches, access points, and endpoints under a single management and policy framework, which simplifies complex networks.

Performance and efficiency: FortiOS is built on Fortinet’s custom ASIC hardware (like NP and CP processors), so it can handle deep inspection and threat prevention at high speeds.

Rich feature set: It combines next‑gen firewall, SD‑WAN, IPS, VPN, and web filtering capabilities without needing a lot of add‑ons.

Centralized visibility: The GUI and FortiAnalyzer/FortiManager integrations give solid visibility into traffic, users, and threats.

Automation and AI: Newer versions include automated playbooks and FortiAI-driven threat detection—useful for reducing manual response time.

What context are you thinking about—enterprise deployment, lab testing, or just general curiosity? I can tailor the details (e.g., best features for SD‑WAN vs. security operations). Review collected by and hosted on G2.com.

What do you dislike about FortiOS?

Common Things People Dislike About FortiOS

1. GUI Inconsistency Between Versions

Fortinet frequently changes the layout, naming, or locations of options in the GUI.

This makes upgrading feel like learning a new interface each time.

Examples:

WAN configuration placement changed between versions

Policy views & SD‑WAN menus keep moving

Logging options get renamed or relocated

2. Some Features Are Only Fully Usable via CLI

Even though the GUI is good, certain advanced settings require CLI commands.

Admins often complain about needing CLI for:

Complex SD‑WAN rules

Detailed session control

Deep debugging

Advanced routing tweaks

3. SD‑WAN Can Be Confusing for New Users

FortiOS SD‑WAN is powerful but feels complex, especially when combining:

SD‑WAN rules

Performance SLAs

Health checks

Policy routes

Firewall policies referencing SD‑WAN zones

Many users say SD‑WAN in FortiOS is “too many steps for a simple thing.”

4. Frequent Upgrades Required to Avoid Bugs

FortiOS occasionally introduces bugs in new builds (like SSL-VPN issues, Web Filter crashes, HA failover glitches).

Admins often wait for “mature” releases.

5. SSL‑VPN Performance Issues on Lower Models

On mid- or entry-level FortiGate units, SSL‑VPN can:

Max out CPU

Drop throughput significantly

Become unstable with many users

IPSec is generally better but requires more setup.

6. Licensing Complexity

Fortinet licensing is not terrible, but:

Many features are bundled (not modular)

Multiple license types (UTM, Enterprise, 360 Protection, Zero Trust)

Fabric Agent integrations are confusing for new users

7. Logs Can Become Overwhelming

FortiOS generates a massive amount of logs.

Finding the exact log you want sometimes feels like hunting through noise.

While FortiAnalyzer helps, it adds cost.

8. FortiCloud & Remote Management Lag

FortiCloud is convenient but sometimes:

Feels slow

Has session drops

Syncs late

GUI elements don't load quickly

This frustrates remote administrators.

9. HA Failover Behavior Can Be Tricky

High-availability clusters work well, but:

Config sync can fail silently

Interface monitoring must be tuned

SD‑WAN failover adds complexity

HA upgrades require careful planning

10. Not All Features Are Intuitive

Examples:

Proxy-based vs flow-based confusion

Web Filter profiles vs DNS Filter vs Application Control

Implicit policies (hidden defaults)

Routing table behavior with SD‑WAN zones

This can be overwhelming for junior admins. Review collected by and hosted on G2.com.

What problems is FortiOS solving and how is that benefiting you?

✔ Less downtime

✔ Faster troubleshooting

✔ Stronger network security

✔ Easier branch connectivity

✔ Simplified firewall/VPN management

✔ Better visibility & reporting

✔ Less manual work

✔ Lower overall network management cost Review collected by and hosted on G2.com.

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Validated ReviewerSource: Organic

 ![Verified User in Leisure, Travel & Tourism](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User in Leisure, Travel & Tourism")
AL

Verified User in Leisure, Travel & Tourism

Mid-Market (51-1000 emp.)

7/29/2026

"Centralized Multi-Tenant Security Management with VDOMs and a Unified Fabric"

4/5

What do you like best about FortiOS?

Centralized management through VDOMs, which lets us segment and administer many client environments from a single platform. The unified security fabric (firewall, IPS, VPN) simplifies operations across our multi-tenant infrastructure and reduces the number of point solutions we need to maintain Review collected by and hosted on G2.com.

What do you dislike about FortiOS?

Control-plane regressions during major hardware migrations (e.g. moving between chassis generations) that require careful validation before cutover. Also the hard end-of-life deadlines on IPS signatures for older models, which force migration timelines rather than letting us plan them on our own schedule. Review collected by and hosted on G2.com.

What problems is FortiOS solving and how is that benefiting you?

Consolidates security for many clients on one platform. UI (FortiManager) eases multi-VDOM oversight; integrations fit our monitoring/ticketing tools; per-VDOM pricing is predictable; TAC support was strong during a complex hardware migration Review collected by and hosted on G2.com.

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Validated ReviewerSource: Organic

 ![Vasileios P.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Vasileios P.")
VP

Vasileios P.

Head of Cyber

Mid-Market (51-1000 emp.)

4/15/2026

"Unified Security Fabric and Performance, but a Steep Learning Curve and Buggy Releases"

3.5/5

What do you like best about FortiOS?

FortiOS is most praised for its unified Security Fabric, which integrates networking, security, and management (firewalls, switches, access points) into one cohesive operating system Review collected by and hosted on G2.com.

What do you dislike about FortiOS?

Based on user experiences and professional reviews, FortiOS is widely regarded as a top-tier, high-performance firewall operating system. At the same time, it is often criticized for having a steep learning curve, for buggy firmware releases, and for inconsistent customer support. Review collected by and hosted on G2.com.

What problems is FortiOS solving and how is that benefiting you?

FortiOS is a comprehensive, AI-powered security operating system that forms the foundation of the Fortinet Security Fabric and addresses core challenges such as network complexity, fragmented security, and increasingly sophisticated threat landscapes. By bringing networking and security together within a single operating system, FortiOS helps organizations manage diverse environments—on-premises, hybrid, and cloud—through one unified policy framework. Review collected by and hosted on G2.com.

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Validated ReviewerIncentivizedSource: G2 invite

 ![Verified User in Information Technology and Services](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User in Information Technology and Services")
AI

Verified User in Information Technology and Services

Mid-Market (51-1000 emp.)

3/24/2026

"All-in-One Security That Gets the Job Done"

4.5/5

What do you like best about FortiOS?

What I like most about FortiOS is that it offers an all-in-one security platform. It brings together the firewall, VPN, SD-WAN, web filtering, and intrusion prevention in a single system, which makes managing network security much more efficient and straightforward. Review collected by and hosted on G2.com.

What do you dislike about FortiOS?

One of the main drawbacks of FortiOS is that its user interface can feel confusing, especially for new users. Moving through the settings isn’t always intuitive, and tracking down specific configurations can take longer than expected.

Another challenge is that many advanced features still require CLI access. This can be difficult for teams that would rather manage everything through a fully GUI-based experience. Review collected by and hosted on G2.com.

What problems is FortiOS solving and how is that benefiting you?

FortiOS helps us consolidate multiple security and networking functions into a single platform, so we don’t need separate tools for the firewall, VPN, SD-WAN, and web filtering. This streamlines our setup and reduces both complexity and day-to-day operational overhead.

It also strengthens our overall security posture by delivering real-time threat protection through IPS, antivirus, and web filtering. As a result, we can proactively block malicious traffic and better reduce security risks. Review collected by and hosted on G2.com.

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3/26/2026
Current UserValidated ReviewerSource: Organic

NS

Nisarahmed S.

Network Engineer ||

Enterprise (\> 1000 emp.)

4/30/2026

"Easy Deployment and Backup with a Straightforward Setup"

4.5/5

What do you like best about FortiOS?

It’s easy to deploy and to back up the configuration. It’s also straightforward to understand, explore, and get familiar with. Review collected by and hosted on G2.com.

What do you dislike about FortiOS?

It needs to be updated with every new release, and any bugs should be resolved. Review collected by and hosted on G2.com.

What problems is FortiOS solving and how is that benefiting you?

It’s easy to manage through the GUI, and the configuration is straightforward to understand. Upgrades also take less time. Review collected by and hosted on G2.com.

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Current UserValidated ReviewerIncentivizedSource: G2 invite

AB

Ash B.

Director of IT

Small-Business (50 or fewer emp.)

4/28/2026

"Frequent Firmware Updates, Bugs, and Performance Issues Hold It Back"

1.5/5

What do you like best about FortiOS?

It’s easy to use and cost-effective, and the support team is responsive. Review collected by and hosted on G2.com.

What do you dislike about FortiOS?

Constant firmware updates seem to be needed because of careless coding, ongoing bugs, and vulnerabilities. Performance also sometimes suffers. Review collected by and hosted on G2.com.

What problems is FortiOS solving and how is that benefiting you?

They offer a full line of networking equipment that can either integrate with, or replace, some of the larger, more expensive brands. Review collected by and hosted on G2.com.

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Current UserValidated ReviewerIncentivizedSource: G2 invite

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