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 #8 with an average rating of 7.9, while Stellar Cyber is ranked #49. Fortinet holds a 2.7% mindshare in SIEM, compared to Stellar Cyber’s 1.3% mindshare. Additionally, 83% of Fortinet users are willing to recommend the solution.

Fortinet FortiSIEM

Read 75 Fortinet FortiSIEM reviews

6,543 Views
4,842 Comparison Views

83% willing to recommend

Stellar Cyber Open XDR

Read 2 Stellar Cyber Open XDR reviews

3,701 Views
1,851 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: March 2026).

Buyer's Guide

Fortinet FortiSIEM vs. Stellar Cyber Open XDR

March 2026

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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)

8th

Average Rating

7.6

Reviews Sentiment

6.2

Number of Reviews

Ranking in other categories

AI Observability (8th)

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

User Entity Behavior Analytics (UEBA) (27th), Endpoint Detection and Response (EDR) (56th), Network Traffic Analysis (NTA) (18th), 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) (17th)

Mindshare comparison

As of March 2026, in the Security Information and Event Management (SIEM) category, the mindshare of Fortinet FortiSIEM is 2.7%, down from 3.1% compared to the previous year. The mindshare of Stellar Cyber Open XDR is 1.3%, up from 1.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Security Information and Event Management (SIEM) Mindshare Distribution
Product	Mindshare (%)
Fortinet FortiSIEM	2.7%
Stellar Cyber Open XDR	1.3%
Other	96.0%

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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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

"The solution’s IP database is awesome."

"The solution is very stable. It's run for years without the need to do anything except, add new patches when they are available, which are always a good idea to install."

"There's a great feature on the solution that allows us to analyze security issues and incidents."

"Easy alert setup which enables different alerts in different categories."

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

"AccelOps can handle a lot of data and it's just so important to true monitoring."

"It works well with medium to large-scale enterprises."

"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

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

"Ease-of-use for end users that do not spend every day in the product. Also, the presentation of historical and trending data in dashboards needs to be improved immensely."

"They could work on their documentation. If there's anything about the solution that needs improvement, it's that. For example, documentation already is on a very high level but specifically on the CLI there are tons of features which can be fine-tuned and thousands of commands are very difficult to document. If they could make this easier, it would improve the overall solution."

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

"I would like to see easier implementation in the future."

"The solution's technical support didn't help our company a lot."

"The initial setup was quite complex."

"The UI could improve in Fortinet FortiSIEM. Humans view the UI frequently for data and if it was more visually pleasing it would be beneficial."

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

"The price of the solution is expensive. The license is scalable. If there are 10 devices it is simple to license."

"Fortinet FortiSIEM is cheaper compared to other products."

"They have a yearly subscription."

"Fortinet FortiSIEM is very cost-efficient compared to other SIEM solutions."

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

"There is a need to make yearly payments towards the licensing charges attached to the product. The free version license of the product is available for two months."

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

10%

Comms Service Provider

Financial Services Firm

Manufacturing Company

13%

Comms Service Provider

10%

Computer Software Company

Financial Services Firm

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?

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

March 2026

Download Fortinet FortiSIEM product report

Buyer's Guide

Extended Detection and Response (XDR)

February 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

March 2026

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: March 2026.

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