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 #47. Fortinet holds a 2.8% mindshare in SIEM, compared to Stellar Cyber’s 1.4% mindshare. Additionally, 83% of Fortinet users are willing to recommend the solution.

Fortinet FortiSIEM

Read 76 Fortinet FortiSIEM reviews

5,718 Views
4,231 Comparison Views

83% willing to recommend

Stellar Cyber Open XDR

Read 2 Stellar Cyber Open XDR reviews

3,164 Views
1,709 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: December 2025).

Buyer's Guide

Fortinet FortiSIEM vs. Stellar Cyber Open XDR

December 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

6.2

Number of Reviews

Ranking in other categories

AI Observability (5th)

Stellar Cyber Open XDR

Ranking in Security Information and Event Management (SIEM)

47th

Average Rating

0.0

Reviews Sentiment

7.0

Number of Reviews

Ranking in other categories

User Entity Behavior Analytics (UEBA) (24th), Endpoint Detection and Response (EDR) (58th), Network Traffic Analysis (NTA) (19th), Security Orchestration Automation and Response (SOAR) (24th), Network Detection and Response (NDR) (20th), Extended Detection and Response (XDR) (35th), Identity Threat Detection and Response (ITDR) (19th)

Mindshare comparison

As of January 2026, in the Security Information and Event Management (SIEM) category, the mindshare of Fortinet FortiSIEM is 2.8%, down from 3.0% compared to the previous year. The mindshare of Stellar Cyber Open XDR is 1.4%, up from 1.2% 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	2.8%
Stellar Cyber Open XDR	1.4%
Other	95.8%

Security Information and Event Management (SIEM)

Featured Reviews

SaurabhYadav5

Network Engineer at Ogma Consulting

Comprehensive monitoring boosts security, yet incident management features need expansion

Fortinet FortiSIEM should broaden its remediation part to include more features for incident management. Currently, to manage repetitive incidents or for remediation, I need to use a separate software called FortiSOAR. Additionally, the search functionality in FortiAI should be improved to provide more precise results, making it easier for me to understand what actions need to be taken.

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Jeevan Chandran

Global Director, Commercial Operations at Promasecure LLC

Automated security monitoring increases efficiency, but market visibility needs improvement

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 cater to everyone effectively. While I have not encountered significant drawbacks so far, market penetration is challenging due to the product's newness, despite its flexibility and customization features. I find their user interface to be quite good.

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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

"We have found the most important features in Fortinet FortiSIEM to be the correlation, file utility check, latest file, and hash changes. These features are important for us."

"The ability to write my own parsers for the devices that are not supported by Fortinet is the most valuable feature."

"Its automated response feature has benefited our customer communication. Analysts feel more confident in providing timely responses."

"Fortinet FortiSIEM is easy to use."

"The primary valuable feature is that it has replaced a whole lot of other products with one platform."

"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."

"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."

"It's very easy for anyone to work with."

More Fortinet FortiSIEM pros

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

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

Cons

"Areas for improvement would be the ease of use and the integration with Fortinet's own products."

"Fortinet FortiSIEM should broaden its remediation part to include more features for incident management. Currently, to manage repetitive incidents or for remediation, I need to use a separate software called FortiSOAR."

"Does not have load-sharing or high-availability, and these are important things to implement. I can do the same things in another way, but not naturally having these features makes it complicated."

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

"Our team tried configuring MS SQL database logs with Fortinet FortiSIEM, but it did not work for some time."

"Our customers are noticing configuration available in the GUI interface and I think that they should be equal."

"The dashboards need to be improved. It gives you so much detail, but sometimes too much detail, especially to an executive, it's too much."

"Network detection and response is a separate product."

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

"Fortinet's products are not expensive, it is less than the competition."

"The price of Fortinet FortiSIEM was reasonable compared to other solutions."

"We pay for a license for FortiSIEM. We pay for the license and renewal."

"Pricing is acceptable for more than 90% of our customers, as they normally get discounts."

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

"The price is competitive."

"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."

"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."

More Fortinet FortiSIEM pricing and cost advice

"It’s a single license platform."

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Top Industries

By visitors reading reviews

Computer Software Company

11%

Financial Services Firm

Comms Service Provider

Manufacturing Company

13%

Computer Software Company

10%

Comms Service Provider

Government

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	34
Midsize Enterprise	22
Large Enterprise	24

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?

My experience with pricing, setup cost, and licensing for Fortinet FortiSIEM is wonderful, as it offers an excellent license compared to other vendors.

See all answers

What needs improvement with Fortinet FortiSIEM?

Fortinet FortiSIEM is great overall. Performance could be enhanced, but I do not wish to elaborate on needed improvements.

See all answers

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...

See all answers

What needs improvement with Stellar Cyber Open XDR?

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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Compared 4% of the time

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Compared 4% of the time

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Compared 3% of the time

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Product Reports

Buyer's Guide

Fortinet FortiSIEM

January 2026

Download Fortinet FortiSIEM product report

Buyer's Guide

Extended Detection and Response (XDR)

January 2026

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

December 2025

Free Report: Fortinet FortiSIEM vs. Stellar Cyber Open XDR

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