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 #48. Fortinet holds a 3.0% 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

5,515 Views
4,081 Comparison Views

83% willing to recommend

Stellar Cyber Open XDR

Read 2 Stellar Cyber Open XDR reviews

2,880 Views
1,642 Comparison Views

0% willing to recommend

Fortinet FortiSIEM

Stellar Cyber Open XDR

Comparison Buyer's Guide

Download the report

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

Download the complete report

Helped 879,310 peers since 2012

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 (9th)

Stellar Cyber Open XDR

Ranking in Security Information and Event Management (SIEM)

48th

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) (60th), Network Traffic Analysis (NTA) (20th), Security Orchestration Automation and Response (SOAR) (24th), Network Detection and Response (NDR) (21st), Extended Detection and Response (XDR) (34th), Identity Threat Detection and Response (ITDR) (20th)

Mindshare comparison

As of December 2025, in the Security Information and Event Management (SIEM) category, the mindshare of Fortinet FortiSIEM is 3.0%, up 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	3.0%
Stellar Cyber Open XDR	1.4%
Other	95.6%

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.

Read full review

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.

Read full review

Quotes from Members

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

Pros

"We like the integration of all of these Fortinet platforms together. Everything is integrated well, and we are able to sell that as a service to our customers."

"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."

"Analytics. It can provide log information from the device. With log information, I can see if there is a threat"

"The event correlation is pretty robust. The GUI is pretty good."

"The product is quite well-organized. The GUI makes it easy to navigate."

"Our customer did not have security monitoring in the first place. With this solution, it provided security posture management and visibility about the security landscape and threats that they had."

"The most valuable feature of Fortinet FortiSIEM is the correlation of many events."

"FortiSIEM provides a single PIN to monitor SOC and NOC. It's a nice tool for integration and monitoring. It provides multiple categories for monitoring based on security designations like low, medium, and high."

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

"Creating parsers to try make unknown events or currently unsupported devices produce meaningful information is extremely cumbersome."

"It lacks a "wizard" that shows a particular user's activity or particular circumstance. I think the interface is intimidating because there's so much information there."

"The nodes on our network did not comply with the SIEM solution. They use a different format parking log."

"The built-in APIs in Fortinet FortiSIEM are somewhat lacking and could be improved for better integration with external ITSM products."

"The graphs on the user interface could be improved as we often experience glitches."

"If there is a configuration on the wrong side of the network or there are changes that result in harm to our IT infrastructure, the solution should immediately fix it."

"They need to integrate better with Cisco and Palo Alto."

"With FortiSIEM, the issue has to do with the ways we can generate a report. It's not as flexible compared to that with other SIEM tools, like Splunk."

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

"If one is cheap and ten is expensive. I rate the tool's price as an eight out of ten. Compared with Splunk or Oracle, Fortinet is cheap."

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

"Fortinet FortiSIEM is cheaper compared to other products."

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

"Pricing is determined based on the customer's budget."

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

"Please be cheaper and more simplified."

"The price of Fortinet FortiSIEM is a lot less when compared to other solutions."

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.

See recommendations

879,310 professionals have used our research since 2012.

Top Industries

By visitors reading reviews

Computer Software Company

12%

Financial Services Firm

10%

Comms Service Provider

Government

Manufacturing Company

12%

Computer Software Company

11%

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...

See all answers

Comparisons

IBM Security QRadar vs Fortinet FortiSIEM

Compared 10% of the time

Splunk Enterprise Security vs Fortinet FortiSIEM

Compared 9% of the time

Wazuh vs Fortinet FortiSIEM

Compared 9% of the time

ManageEngine Log360 vs Fortinet FortiSIEM

Compared 6% of the time

More Fortinet FortiSIEM Competitors

Wazuh vs Stellar Cyber Open XDR

Compared 13% of the time

Sentinel vs Stellar Cyber Open XDR

Compared 8% of the time

CrowdStrike Falcon vs Stellar Cyber Open XDR

Compared 4% of the time

Microsoft Sentinel vs Stellar Cyber Open XDR

Compared 4% of the time

Trend Vision One vs Stellar Cyber Open XDR

Compared 3% of the time

More Stellar Cyber Open XDR Competitors

Product Reports

Buyer's Guide

Fortinet FortiSIEM

December 2025

Download Fortinet FortiSIEM product report

Buyer's Guide

Extended Detection and Response (XDR)

December 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

December 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: December 2025.

DOWNLOAD NOW

879,310 professionals have used our research since 2012.

See our Fortinet FortiSIEM vs. Stellar Cyber Open XDR report.

See our list of best Security Information and Event Management (SIEM) vendors.

We monitor all Security Information and Event Management (SIEM) reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.