AlienVault OSSIM vs Fortinet FortiSIEM comparison

AT&T and Fortinet are both solutions in the Security Information and Event Management (SIEM) category. AT&T is ranked #12 with an average rating of 7.4, while Fortinet is ranked #7 with an average rating of 8.1. AT&T holds a 2.6% mindshare in SIEM, compared to Fortinet’s 3.3% mindshare. Additionally, 80% of AT&T users are willing to recommend the solution, compared to 82% of Fortinet users who would recommend it.

AlienVault OSSIM

Read 31 AlienVault OSSIM reviews

4,632 Views
4,539 Comparison Views

80% willing to recommend

Fortinet FortiSIEM

Read 75 Fortinet FortiSIEM reviews

5,537 Views
4,042 Comparison Views

82% willing to recommend

AlienVault OSSIM

Fortinet FortiSIEM

Comparison Buyer's Guide

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Executive SummaryUpdated on Sep 18, 2024

Fortinet FortiSIEM and AlienVault OSSIM are two prominent SIEM solutions. Fortinet FortiSIEM appears to have the upper hand due to its ease of deployment and customer service.

Features: Fortinet FortiSIEM offers comprehensive alerting, robust integration capabilities, and intuitive configuration. AlienVault OSSIM provides extensive threat intelligence, powerful reporting tools, and a rich feature set.

Room for Improvement: Fortinet FortiSIEM could improve scalability, refine its analytics, and enhance its documentation. AlienVault OSSIM needs to lower its learning curve, improve its documentation, and simplify its deployment.

Ease of Deployment and Customer Service: Fortinet FortiSIEM is noted for its smooth deployment process and excellent customer service, with straightforward implementation and responsive support. AlienVault OSSIM faces criticism for complex deployment and less accessible support.

Pricing and ROI: Fortinet FortiSIEM is recognized for competitive pricing and a solid return on investment. AlienVault OSSIM, although more expensive upfront, is considered worth the price for its feature-rich offering, but its complexity and support challenges can impact the overall ROI.

To learn more, read our detailed AlienVault OSSIM vs. Fortinet FortiSIEM Report (Updated: September 2025).

Buyer's Guide

AlienVault OSSIM vs. Fortinet FortiSIEM

September 2025

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Helped 869,883 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

AlienVault OSSIM

Ranking in Security Information and Event Management (SIEM)

12th

Average Rating

7.4

Reviews Sentiment

7.1

Number of Reviews

Ranking in other categories

No ranking in other categories

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

Mindshare comparison

As of October 2025, in the Security Information and Event Management (SIEM) category, the mindshare of AlienVault OSSIM is 2.6%, down from 4.3% compared to the previous year. The mindshare of Fortinet FortiSIEM is 3.3%, up from 2.9% 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	3.3%
AlienVault OSSIM	2.6%
Other	94.1%

Security Information and Event Management (SIEM)

Featured Reviews

HarshBhardiya

SOC Engineer at Just Dial Limited

An open-source solution that provide good detection and more visibility

The solution is not scalable. It impacts so hard. In the initial stages, AlienVault OSSIM can be suitable for small environments. There may be limitations if the customer expresses a desire to expand and add more devices. In such cases, we would need to either explore additional solutions or work within the constraints of the existing setup. We have set up alerts and configured everything in AlienVault OSSIM. It actively monitors for any security incidents. It provides us with regular updates and notifications about any ongoing activities. Only one person is using the solution. It is the perfect solution for small businesses. I rate the solution’s scalability a three out of ten.

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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…

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

"AlienVault OSSIM is an enterprise solution that sells easily. It is rated highly by organizations."

"The most valuable feature is the logging capability."

"The initial setup is straightforward."

"The initial setup was straightforward. I didn't have any problems."

"The solution has a very good open source community, and whenever we have problems, we are always able to resolve it online."

"The tool's security detection is good. It helps us with login tracking and generating reports. We aim to identify potential issues, such as brute-force attacks on user accounts or server-level anomalies. For instance, if I receive a report indicating a server is at an abnormal level, I investigate and address the issue."

"The open vault component and the checking of vulnerabilities are the most valuable features. The page management helps with this. If you know how your device is vulnerable at least you can do something about it."

"You pay monthly for the solution. I think it's one of the best products. If you compare with other companies, like LogRhythm, etc., the top 8 or 10 CMs, I think Alien Vault has the best price-performance ratio."

More AlienVault OSSIM pros

"FortiSIEM is a great tool for making security processes transparent."

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

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

"The solution is easy to use and user-friendly."

"We're able to get real-timec as well as our customer networks that we're monitoring at all times."

"Fortinet FortiSIEM's most valuable feature is the simplicity in handling multi-tenancy and the ability to switch between different clients at the same time. That was handled flawlessly."

"Fortinet FortiSIEM provides good detection against advanced threats."

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

More Fortinet FortiSIEM pros

Cons

"There needs to be more support or some kind of training program so users can self-learn the system more effectively."

"AlienVault OSSIM could improve by having better integration with some of the newer tools."

"AlienVault OSSIM’s configuration and integration could be a little easier."

"I would like the solution to be able to integrate with my firewall, my IDS and my Honeypot solutions so that it can provide real-time reporting as things occur and then have alert sent to me on my phone when suspicious activity is happening."

"There are somewhat more false positives with the user behavior analytics, which could benefit from an additional machine learning model to detect user patterns more rapidly."

"The solution needs more integration with cyber intelligence systems."

"I don't like to work on OSSIM because it is unpredictable."

"AlienVault OSSIM gives unwanted notifications."

More AlienVault OSSIM cons

"Fortinet FortiSIEM is a little out of sight and needs more marketing efforts to be popular in the market."

"It's difficult to integrate unsupported devices with FortiSIEM compared to QRadar. It's easier to integrate and develop processes in QRadar. It's harder to develop a custom process in FortiSIEM."

"The policy editing should be easier. Right now, it's too hard."

"The solution's interface could be modernized and improved."

"The deployment of the platform took some time to set up and configure."

"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."

"The biggest thing that could be better is a quicker response to support cases."

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

More Fortinet FortiSIEM cons

Pricing and Cost Advice

"AlienVault OSSIM is expensive compared to its competitors."

"The solution is open source, so it's free to use."

"OSSIM is open source, and USM is the paid license. So, if you want, you can switch to USM. There you will have to buy a license, and they have a support team that helps you out on issues you face."

"When comparing AlienVault OSSIM to Microsoft Sentinel, AlienVault OSSIM incurs additional costs due to its licensing price structure. If you are using AlienVault for security purposes at a certain level it can have a higher price point than the current pricing of Microsoft Sentinel."

"We are using a free version of the solution. If you purchase a license there are more features available but the price is a little high. The solution should be cheaper to allow more customers to be able to afford it."

"AlienVault OSSIM is an open-source solution."

"AlienVault pricing is the best. Whatever cost you are paying, you are getting a return on every penny... It's not like your IBM, your QRadar, or Splunk, where the cost is too high."

"The tool's licensing costs are yearly."

More AlienVault OSSIM 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."

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

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

"There are additional features that cost more than the standard licensing fees."

"FortiSIEM's licensing is based on EPS, and its pricing is competitive in the market."

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

"Please be cheaper and more simplified."

"Fortinet FortiSIEM is not an expensive solution."

More Fortinet FortiSIEM pricing and cost advice

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Top Industries

By visitors reading reviews

Computer Software Company

14%

Comms Service Provider

12%

University

Educational Organization

Computer Software Company

13%

Financial Services Firm

Comms Service Provider

Government

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	18
Midsize Enterprise	9
Large Enterprise	8

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

Questions from the Community

What do you like most about AlienVault OSSIM?

Asset discovery is good.

See all answers

What is your experience regarding pricing and costs for AlienVault OSSIM?

It depends. I would need to review their cost models, but generally, they are on a scaled basis based on throughput usage. Because it's a software as a service solution for their core product for U...

See all answers

What needs improvement with AlienVault OSSIM?

Scaling for USM is always challenging for any product unless it is purpose-built or overbuilt at the front end. They will use Palo Alto and its competitors, and LevelBlue will manage that implement...

See all answers

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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Comparisons

Wazuh vs AlienVault OSSIM

Compared 70% of the time

USM Anywhere vs AlienVault OSSIM

Compared 7% of the time

Venusense USM vs AlienVault OSSIM

Compared 7% of the time

Splunk Enterprise Security vs AlienVault OSSIM

Compared 5% of the time

Microsoft Sentinel vs AlienVault OSSIM

Compared 1% of the time

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IBM Security QRadar vs Fortinet FortiSIEM

Compared 11% of the time

Wazuh vs Fortinet FortiSIEM

Compared 11% of the time

Splunk Enterprise Security vs Fortinet FortiSIEM

Compared 10% of the time

ManageEngine Log360 vs Fortinet FortiSIEM

Compared 7% of the time

LogRhythm SIEM vs Fortinet FortiSIEM

Compared 5% of the time

More Fortinet FortiSIEM Competitors

Product Reports

Buyer's Guide

AlienVault OSSIM

October 2025

Download AlienVault OSSIM product report

Buyer's Guide

Fortinet FortiSIEM

October 2025

Download Fortinet FortiSIEM product report

Also Known As

OSSIM

FortiSIEM, AccelOps

Overview

AlienVault OSSIM, Open Source Security Information and Event Management (SIEM), provides you with a feature-rich open source SIEM complete with event collection, normalization and correlation. Launched by security engineers because of the lack of available open source products, AlienVault OSSIM was created specifically to address the reality many security professionals face: A SIEM, whether it is open source or commercial, is virtually useless without the basic security controls necessary for security visibility.

AT&T

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

Sample Customers

Council Rock School District

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.

Buyer's Guide

AlienVault OSSIM vs. Fortinet FortiSIEM

September 2025

Free Report: AlienVault OSSIM vs. Fortinet FortiSIEM

Find out what your peers are saying about AlienVault OSSIM vs. Fortinet FortiSIEM and other solutions. Updated: September 2025.

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