Fortinet FortiSIEM vs Stellar Cyber Open XDR comparison

Fortinet and Stellar Cyber are both solutions in the Security Information and Event Management (SIEM) category. Fortinet is ranked #7 with an average rating of 8.2, while Stellar Cyber is ranked #49. Fortinet holds a 3.2% mindshare in SIEM, compared to Stellar Cyber’s 1.4% mindshare. Additionally, 82% of Fortinet users are willing to recommend the solution.

Fortinet FortiSIEM

Read 75 Fortinet FortiSIEM reviews

5,725 Views
4,122 Comparison Views

82% willing to recommend

Stellar Cyber Open XDR

Read 2 Stellar Cyber Open XDR reviews

2,575 Views
1,571 Comparison Views

0% willing to recommend

Fortinet FortiSIEM

Stellar Cyber Open XDR

Comparison Buyer's Guide

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Executive Summary

We performed a comparison between Fortinet FortiSIEM and Stellar Cyber Open XDR based on real PeerSpot user reviews.

Find out in this report how the two Security Information and Event Management (SIEM) solutions compare in terms of features, pricing, service and support, easy of deployment, and ROI.

To learn more, read our detailed Fortinet FortiSIEM vs. Stellar Cyber Open XDR Report (Updated: September 2025).

Buyer's Guide

Fortinet FortiSIEM vs. Stellar Cyber Open XDR

September 2025

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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:

Categories and Ranking

Fortinet FortiSIEM

Ranking in Security Information and Event Management (SIEM)

7th

Average Rating

7.6

Reviews Sentiment

5.8

Number of Reviews

Ranking in other categories

No ranking in other categories

Stellar Cyber Open XDR

Ranking in Security Information and Event Management (SIEM)

49th

Average Rating

0.0

Reviews Sentiment

7.0

Number of Reviews

Ranking in other categories

Endpoint Detection and Response (EDR) (59th), Security Orchestration Automation and Response (SOAR) (24th), Network Detection and Response (NDR) (20th), Extended Detection and Response (XDR) (36th)

Mindshare comparison

As of September 2025, in the Security Information and Event Management (SIEM) category, the mindshare of Fortinet FortiSIEM is 3.2%, up from 2.9% compared to the previous year. The mindshare of Stellar Cyber Open XDR is 1.4%, up from 1.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Security Information and Event Management (SIEM) Market Share Distribution
Product	Market Share (%)
Fortinet FortiSIEM	3.2%
Stellar Cyber Open XDR	1.4%
Other	95.4%

Security Information and Event Management (SIEM)

Featured Reviews

Oliver Jackson

Network Engineer at Laminar Communications Pty Ltd

Systems monitoring enhanced by firewall and intrusion detection features

My primary use case for Fortinet FortiSIEM is systems monitoring and alerting. I use it for standard functions like log monitoring, incident detection, and notification. My customers are mostly medium-sized enterprises ranging from engineering companies, mining companies, independent schools, and…

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Hrishiraj Bhattacharjee

Founder & CEO at Team Karimganj

Correlates incidents, allows for quicker identification and helps prioritize investigations

The only challenge is, and that’s where we come into play, it’s a pretty high-tech platform. So, it’s difficult for small and medium-sized organizations to manage it on their own. It’s a very complex system. It requires a lot of expertise. All my guys who work on it have gone through certification from Stellar itself. There are three different certifications that you need to complete. Only then are you certified by Stellar to work on it. It’s a very complex platform. Not everyone can use it. A simple IT engineer or system admin won’t be able to handle it because it’s quite complex. You need to have an understanding of the industry, the subject, and the tool. So, just purchasing this tool or license and then using it on your own would be very difficult to configure and manage on a day-to-day basis. The pricing model is not suitable for small and medium companies, particularly small companies. The minimum pricing model they have is suitable for companies with more than one thousand users. So, if someone has 50 to 100 users, like typical small companies, it’s difficult for them because the cost involved is high. Stellar would charge you for those thousand users, but you do not need all those users. So what are they going to do? I guess Stellar does not want to target small companies directly and maybe relies on resellers and MSPs like us to sell it. So, that is something I would recommend changing. Otherwise, it’s a great tool, but because of the pricing model, small companies are unable to leverage the advantage of this beautiful tool. So, the pricing model should be suitable for small and medium businesses. The product currently has vulnerability monitoring and everything. But if they could also do something about vulnerability management and maybe patch management, that would be nice.

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Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Pros

"To add workers and even collectors is pretty easy."

"These aspects make Fortinet FortiSIEM a valuable choice."

"The most valuable features of the solution is its integration with other technologies, especially its ability to collect logs from Cisco and Aruba devices along with Fortinet products."

"FortiSIEM allows you to match IPs with threat intelligence feeds from sources like Kaspersky or Anomali, adding valuable context."

"The tool's most valuable feature stems from the fact that I can see a complete analysis, like all the incidents that have happened, and it detects everything in real-time."

"Fortinet FortiSIEM has its own validated and authentic IP database that marks malicious IP attacks against the firewall and generates an alert for the same."

"Fortinet FortiSIEM provides good detection against advanced threats."

"We have many application systems, and I can set up Fortinet FortiSIEM for users to monitor their systems."

More Fortinet FortiSIEM pros

"It can integrate with almost any cybersecurity tool available in the market."

"Stellar Cyber Open XDR offers these functionalities at a more affordable price, making it easier for me to position it with price-sensitive customers."

Cons

"The only drawback is the licensing model. It can get expensive if you want to integrate more solutions."

"FortiSIEM could be better integrated with other vendors."

"I would like to see more integration with other platforms."

"We expect the latest patch from Fortinet FortiSIEM to give the ability to work with signature files."

"We need to see incident reports about the event log, without events from the administrator or through human interaction."

"Fortinet FortiSIEM needs to provide better API integrations to users."

"Fortinet FortiSIEM could improve by having better integration and extensions. This would benefit by allowing us to give more rules."

"Its training can be improved. Its price also needs to be improved."

More Fortinet FortiSIEM cons

"I would rate the stability at about five to six. The platform requires some fine-tuning, especially when integrating data sources and creating connectors."

"Support is an issue because they have a limited number of resources."

Pricing and Cost Advice

"Its price can be better. We are Fortinet partners, so we can get discounts, but its price can be an issue at the beginning for others. There is a licensing scheme for every case. There are three licensing schemes that we can choose from."

"Fortinet FortiSIEM is not an expensive solution."

"The solution is available for both, perpetual and subscription licenses."

"Please be cheaper and more simplified."

"Fortinet FortiSIEM is cheaper compared to other products."

"Manageable, however would be better as pay as you go versus CapEX."

"This is probably more on the lower cost end of the spectrum compared to competing products. Fortinet's license model is based on events per second, which makes sense, but that's not typical. It makes it very hard to calculate what your costs are going to be as you scale the platform because some log sources, such as firewall logs, are very noisy, and there are lots and lots of events per second, but some of them are not. So, it becomes a bit of a science experiment trying to guess what your costs are going to be as you scale the solution. This is where other competing products perhaps have a more straightforward license model."

"The tool is really expensive. For what the tool does for our team, the price is fair."

More Fortinet FortiSIEM pricing and cost advice

"It’s a single license platform."

See which vendors are best for you

Use our free recommendation engine to learn which Security Information and Event Management (SIEM) solutions are best for your needs.

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Top Industries

By visitors reading reviews

Computer Software Company

13%

Financial Services Firm

Comms Service Provider

Government

Manufacturing Company

14%

Computer Software Company

11%

Comms Service Provider

10%

Government

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	34
Midsize Enterprise	21
Large Enterprise	23

No data available

Questions from the Community

What do you like most about Fortinet FortiSIEM?

Fortinet FortiSIEM needs to provide better API integrations to users.

See all answers

What is your experience regarding pricing and costs for Fortinet FortiSIEM?

I am not familiar with the price and cost of Fortinet FortiSIEM. I cannot tell you if it is high, expensive, or low. However, I can say that it is cost-effective as it provides everything needed.

See all answers

What needs improvement with Fortinet FortiSIEM?

Regarding Fortinet FortiSIEM, I cannot identify any specific areas for improvement because I can find everything I need. For the time being, I cannot find a real point for improvement. Everything i...

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What is your experience regarding pricing and costs for Stellar Cyber Open XDR?

Pricing is a major benefit of Stellar Cyber Open XDR. I rate it between three and four on the cost scale. It offers functionalities at a significantly lower cost than rival products, enabling me to...

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What needs improvement with Stellar Cyber Open XDR?

I am currently evaluating Stellar Cyber Open XDR in terms of their support. I do not see any major areas for improvement as of now. Their support is good, and the team is small, enabling them to ca...

See all answers

What is your primary use case for Stellar Cyber Open XDR?

I use Stellar Cyber Open XDR ( /products/stellar-cyber-open-xdr-reviews ) as a 24/7 security monitoring tool, especially for customers with large and medium networks. It eliminates the need for a d...

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Product Reports

Buyer's Guide

Fortinet FortiSIEM

September 2025

Download Fortinet FortiSIEM product report

Buyer's Guide

Extended Detection and Response (XDR)

August 2025

Download Stellar Cyber Open XDR product report

Also Known As

FortiSIEM, AccelOps

No data available

Overview

FortiSIEM (formerly AccelOps 4) provides an actionable security intelligence platform to monitor security, performance and compliance through a single pane of glass.

Companies around the world use FortiSIEM for the following use cases:

Threat management and intelligence that provide situational awareness and anomaly detection
Alleviating compliance mandate concerns for PCI, HIPAA and SOX
Managing “alert overload”
Handling the “too many tools” reporting issue
Addressing the MSPs/MSSPs pain of meeting service level agreements

Fortinet

Stellar Cyber Open XDR delivers an advanced, unified security solution designed for real-time threat detection and intelligent response, reducing complexity by integrating multiple tools into a single interface.

Stellar Cyber Open XDR aggregates security data from many sources to provide comprehensive threat detection and response capabilities. It offers a streamlined, user-friendly experience, allowing teams to efficiently manage incidents. By automating routine security tasks, it enhances operational efficiency and increases visibility across the entire network infrastructure.

What are the key features of Stellar Cyber Open XDR?

Open Integration: Connects with existing security tools for seamless data aggregation and correlation.
AI-Powered Analytics: Uses artificial intelligence to predict, detect, and respond to threats with high accuracy.
Automated Incident Response: Accelerates the fighting-back process through intelligent automation.
Comprehensive Dashboards: Offers clear visibility into security metrics through customizable dashboards.

What benefits or ROI should users expect?

Improved Threat Detection: Recognizes threats faster, allowing quick response to reduce potential damage.
Increased Efficiency: Reduces manual work by automating repetitive tasks, saving time for IT teams.
Cost Reduction: Consolidates security tools, decreasing overall expenditure on multiple solutions.
Enhanced Collaboration: Allows diverse security teams to work together more effectively with shared insights.

Stellar Cyber Open XDR is implemented across various industries, including finance, healthcare, and retail, offering tailored security strategies suited to industry-specific challenges. Organizations can take advantage of this integrated approach to align security operations with industry regulations efficiently.

Stellar Cyber

Sample Customers

FortiSIEM has hundreds of customers worldwide in markets including managed services, technology, financial services, healthcare, and government. Customers include Aruba Networks, Compushare, Port of San Diego, Cleveland Indians, Infoblox, Healthways, and Referentia.

Sumitomo Chemical USA, PlastiPak Packaging, University of Denver, Large California State Agency, Large Midwestern American City

Buyer's Guide

Fortinet FortiSIEM vs. Stellar Cyber Open XDR

September 2025

Free Report: Fortinet FortiSIEM vs. Stellar Cyber Open XDR

Find out what your peers are saying about Fortinet FortiSIEM vs. Stellar Cyber Open XDR and other solutions. Updated: September 2025.

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