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 #8 with an average rating of 7.4, while Fortinet is ranked #7 with an average rating of 8.1. AT&T holds a 3.4% 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

5,391 Views
5,283 Comparison Views

80% willing to recommend

Fortinet FortiSIEM

Read 74 Fortinet FortiSIEM reviews

5,920 Views
4,203 Comparison Views

82% willing to recommend

AlienVault OSSIM

Fortinet FortiSIEM

Comparison Buyer's Guide

Download the report

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: July 2025).

Buyer's Guide

AlienVault OSSIM vs. Fortinet FortiSIEM

July 2025

Download the complete report

Helped 861,524 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)

8th

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

6.5

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of July 2025, in the Security Information and Event Management (SIEM) category, the mindshare of AlienVault OSSIM is 3.4%, down from 4.1% compared to the previous year. The mindshare of Fortinet FortiSIEM is 3.3%, up from 3.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.

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.

Read full review

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

"The most valuable feature is the logging capability."

"Asset discovery is good."

"You can customize the dashboards as well as the reporting."

"AlienVault OSSIM's GUI is very user-friendly."

"It has helped us remediate threats in the past by providing significant events that assisted in identifying suspicious activities, such as logins from multiple countries."

"I recommend it due to the experience of the people running it."

"The product is majorly used for threat detection of the agents on servers and endpoints."

"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."

More AlienVault OSSIM pros

"These aspects make Fortinet FortiSIEM a valuable choice."

"Real-time monitoring makes life quite easy for me."

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

"Fortinet FortiSIEM is easy to use."

"The solution’s IP database is awesome."

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

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

"FortiSIEM sends an email or SMS notifications to admins when there are significant incidents. It's a highly efficient way of responding to incidents."

More Fortinet FortiSIEM pros

Cons

"The documentation could be improved."

"The incidence reporting could be better."

"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."

"AlienVault OSSIM gives unwanted notifications."

"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."

"AlienVault OSSIM failed to provide our company a full insight, while also giving out a lot of false positives."

"It's under heavy traffic. If you have heavy traffic, the system is slow."

"Lacking in depth of reporting."

More AlienVault OSSIM cons

"The challenge I face with Fortinet FortiSIEM is the lack of support."

"Customer support service could be better."

"Their technical support is horrible. By horrible, I mean a train wreck of a disaster that has fallen off a bridge and caught fire."

"An improvement would be if FortiSIEM's licensing was based on the number of nodes rather than the EPS."

"The performance can be improved. Sometimes it takes a long time to fetch data."

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

"FortiSIEM needs to expand its integration with third-party vendors. I don't know if Forcepoint has been added, but there were limited resources for integrating Forcepoint solutions when we implemented FortiSIEM. It integrates well with other Fortinet products and solutions from established cybersecurity companies like Palo Alto but doesn't integrate with some of the newer vendors."

"Fortinet FortiSIEM could improve to extend to several locations or sites."

More Fortinet FortiSIEM cons

Pricing and Cost Advice

"The licensing fees for the non-community edition are paid on an annual basis, and there are no costs in addition to this."

"OSSIM is free."

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

"AlienVault OSSIM is free."

"We are using the community version, which can be used for free."

"I used the paid version of the tool and found it to be expensive. It has been a while since I changed to Securonix. I will have to check whether AlienVault charges per device, user, or log."

"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."

"AlienVault OSSIM is expensive compared to its competitors."

More AlienVault OSSIM pricing and cost advice

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

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

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

"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 cheaper compared to other products."

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

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

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

More Fortinet FortiSIEM pricing and cost advice

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

861,524 professionals have used our research since 2012.

Top Industries

By visitors reading reviews

Computer Software Company

16%

Comms Service Provider

10%

Financial Services Firm

University

Computer Software Company

14%

Financial Services Firm

10%

Comms Service Provider

Government

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

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?

The pricing is reasonable, which is why it is preferred by government customers. Windows agent licenses cost around 3,000 Rupees per device per year.

See all answers

What needs improvement with Fortinet FortiSIEM?

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 softw...

See all answers

Comparisons

Wazuh vs AlienVault OSSIM

Compared 75% of the time

USM Anywhere vs AlienVault OSSIM

Compared 6% of the time

Elastic Security vs AlienVault OSSIM

Compared 4% of the time

Splunk Enterprise Security vs AlienVault OSSIM

Compared 3% of the time

More AlienVault OSSIM Competitors

Wazuh vs Fortinet FortiSIEM

Compared 13% of the time

IBM Security QRadar vs Fortinet FortiSIEM

Compared 12% of the time

Splunk Enterprise Security vs Fortinet FortiSIEM

Compared 9% of the time

LogRhythm SIEM vs Fortinet FortiSIEM

Compared 7% of the time

Microsoft Sentinel vs Fortinet FortiSIEM

Compared 5% of the time

More Fortinet FortiSIEM Competitors

Product Reports

Buyer's Guide

AlienVault OSSIM

July 2025

Download AlienVault OSSIM product report

Buyer's Guide

Fortinet FortiSIEM

July 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

July 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: July 2025.

DOWNLOAD NOW

861,524 professionals have used our research since 2012.

See our AlienVault OSSIM vs. Fortinet FortiSIEM 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.