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AlienVault OSSIM vs Fortinet FortiSIEM comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Sep 18, 2024

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)
25th
Average Rating
7.4
Reviews Sentiment
7.1
Number of Reviews
31
Ranking in other categories
No ranking in other categories
Fortinet FortiSIEM
Ranking in Security Information and Event Management (SIEM)
11th
Average Rating
7.6
Reviews Sentiment
6.2
Number of Reviews
75
Ranking in other categories
AI Observability (14th)
 

Mindshare comparison

As of September 2026, in the Security Information and Event Management (SIEM) category, the mindshare of AlienVault OSSIM is 1.2%, down from 3.1% compared to the previous year. The mindshare of Fortinet FortiSIEM is 2.2%, down from 3.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Security Information and Event Management (SIEM) Mindshare Distribution
ProductMindshare (%)
Fortinet FortiSIEM2.2%
AlienVault OSSIM1.2%
Other96.6%
Security Information and Event Management (SIEM)
 

Featured Reviews

BP
Independent Contractor at a comms service provider with 5,001-10,000 employees
Enables cost-effective security management for small businesses
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 implementation. The main area where the AlienVault product was lacking around the 2018 timeframe was in its ability to scale. By pushing it to a cloud-based system, they've largely alleviated scale issues. It's native in Amazon but will also run in Azure. They have worked with cloud service providers to offer enough throughput at a cost reasonable for a corporation. Scaling was their biggest problem, and they've largely conquered those issues.
SY
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.

Quotes from Members

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

Pros

"Its user-friendliness is the most valuable. It is very easy to use and explore. The dashboard is very well packaged and integrated. You don't have to spend a lot of time in configuring it and checking out the RPM etc. It is also free and very powerful."
"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."
"A very good feature of AlienVault OSSIM is that it has many domains that can be integrated from different solutions."
"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."
"This solution is very stable; it runs on a Linux box, you only interface with it through the GUI, it works behind the scenes, and it has never crashed in the time that I have used it."
"Technical support is excellent; they are very helpful and responsive."
"The most valuable features of this solution are the data correlation and vulnerability assessment."
"The initial setup was straightforward. I didn't have any problems."
"The primary thing I use it for is monitoring IPS because we have 12 or 14 Cisco IPS devices, and the Cisco solution for monitoring that many IPS devices is hokey at best, aside from it being expensive."
"It is used as an alerting platform."
"The solution is easy to use and user-friendly."
"The seamless integration with FortiGate is the solution's most valuable aspect."
"The stability is very reliable. It offers very good performance."
"Technical support is helpful."
"The most valuable feature is auto-discovery. When you send logs from any device to port 514, it helps register those devices automatically."
"FortiSIEM gives us a lot of valuable events and details by using a unified event-based framework to analyze all data including logs, performance monitoring data and provides a broad range of metrics."
 

Cons

"ArcSight works better than AlienVault right now."
"The correlation engine needs to be improved."
"We need more dashboards and we need more customization for dashboards."
"The user interface could be improved."
"AlienVault OSSIM could improve by having better integration with some of the newer tools."
"The initial setup was a bit complex. You've got to do a lot of reading. It's not an intuitive implementation."
"Lacking in depth of reporting."
"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."
"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."
"Our customers are noticing configuration available in the GUI interface and I think that they should be equal."
"The initial setup is not simple. We are having some issues with the agent installation, it is requiring several reboots."
"The solution needs to do a better job with third party integration. Right now, that's lacking on the solution. I specifically am talking about the AWS environment. Most of the AWS environment products do not have that capability to integrate."
"We need more incidents automatically to protect our network."
"FortiSIEM is a bit resource-hungry, so work should be done on hardware resource utilization to consume less hardware."
"Our team tried configuring MS SQL database logs with Fortinet FortiSIEM, but it did not work for some time."
"I would like to see more integration with other platforms."
 

Pricing and Cost Advice

"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 solution is open source, so it's free to use."
"OSSIM is free."
"The price of AlienVault OSSIM is too high sometimes for us to present to our customers. The price should be lower. We are on a three-year license to use the solution. We had to pay extra for the support."
"AlienVault OSSIM is an open-source solution."
"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."
"The licensing fees for the non-community edition are paid on an annual basis, and there are no costs in addition to this."
"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."
"The price of the solution is expensive. The license is scalable. If there are 10 devices it is simple to license."
"Fortinet's products are not expensive, it is less than the competition."
"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."
"The price is competitive."
"Pricing is acceptable for more than 90% of our customers, as they normally get discounts."
"Fortinet FortiSIEM is very cost-efficient compared to other SIEM solutions."
"The tool is really expensive. For what the tool does for our team, the price is fair."
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Top Industries

By visitors reading reviews
Comms Service Provider
15%
Financial Services Firm
8%
University
7%
Manufacturing Company
7%
Outsourcing Company
11%
Comms Service Provider
9%
Financial Services Firm
9%
Construction Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business18
Midsize Enterprise9
Large Enterprise8
By reviewers
Company SizeCount
Small Business34
Midsize Enterprise22
Large Enterprise24
 

Questions from the Community

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...
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...
What is your primary use case for AlienVault OSSIM?
This solution is very similar to most of the other MSSPs that you would find out there. When I look at use cases, AlienVault was initially aimed at small to medium businesses. It grew, and that was...
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.
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.
What is your primary use case for Fortinet FortiSIEM?
My main use case for Fortinet FortiSIEM is building a SOC and serving as an event management platform for correlating events in my work. I use Fortinet FortiSIEM for event correlation by building a...
 

Also Known As

OSSIM
FortiSIEM, AccelOps
 

Overview

 

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.
Find out what your peers are saying about AlienVault OSSIM vs. Fortinet FortiSIEM and other solutions. Updated: September 2026.
914,109 professionals have used our research since 2012.