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AlienVault OSSIM vs Fortinet FortiSIEM comparison

 

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)
24th
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)
10th
Average Rating
7.6
Reviews Sentiment
6.2
Number of Reviews
75
Ranking in other categories
AI Observability (14th)
 

Mindshare comparison

As of June 2026, in the Security Information and Event Management (SIEM) category, the mindshare of AlienVault OSSIM is 1.2%, down from 3.6% compared to the previous year. The mindshare of Fortinet FortiSIEM is 2.3%, down from 3.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Security Information and Event Management (SIEM) Mindshare Distribution
ProductMindshare (%)
Fortinet FortiSIEM2.3%
AlienVault OSSIM1.2%
Other96.5%
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

"Technical support is excellent; they are very helpful and responsive."
"The threat policies of the solution are always very advanced and the best in the market, and they are very persistent in terms of keeping up with security protocols."
"There are a lot of people you will find using OSSIM since they are also offering OTX as a service"
"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."
"Inbuilt IDS, inbuilt integration with threat intelligence platform and with vulnerability assessment modules."
"You can customize the dashboards as well as the reporting."
"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."
"I have worked with LogRhythm in the past, since 2015, and I find that AlienVault is a better product."
"We only evaluated this solution and loved the capabilities that it offers."
"It gives greater visibility via the dashboards into the real-time status of the network and also provides specific alerts and performance monitoring."
"It is used as an alerting platform."
"Technical support is helpful."
"Fortinet FortiSIEM is less costly than other products and is available 24/7."
"The interface is very easy to use. The connector in the core has FortiSIEM support from the vendor."
"There are things like dashboards and reports (pre-configured and custom) that let me know that things are operating the way they should be, and when they are not."
"The most valuable feature of Fortinet FortiSIEM is the user and entity behave as analytics(UEBA). This feature mixes your data and provides useful information based on the behavior of the targeted."
 

Cons

"The solution is not scalable."
"AlienVault OSSIM could improve by having better integration with some of the newer tools."
"The user interface needs to be friendlier across the board."
"The initial setup was a bit complex. You've got to do a lot of reading. It's not an intuitive implementation."
"AlienVault OSSIM is costly."
"AlienVault OSSIM gives unwanted notifications."
"AlienVault OSSIM on-premise version is more difficult to implement than the cloud version. Additionally, they should add integration between several different environments at once and improve their online knowledge base."
"The initial setup was not so easy, partly because the documentation was not up to date."
"There are some connectivity issues with FortiAnalyzer and FortiGate."
"As we're an SMB, I would like to see different licensing options and the solution is priced out of the reach of some small businesses."
"The reporting feature is not very attractive for the upper management and I am not able to perform complex/nested queries."
"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."
"The deployment of the platform took some time to set up and configure."
"When an alert triggers in Fortinet FortiSIEM, the layout or format can feel limited"
"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."
"The only drawback is the licensing model. It can get expensive if you want to integrate more solutions."
 

Pricing and Cost Advice

"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 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."
"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."
"AlienVault OSSIM is expensive compared to its competitors."
"The solution is open source, so it's free to use."
"AlienVault OSSIM is an open-source solution."
"AlienVault OSSIM is free."
"We are using the community version, which can be used for free."
"Fortinet FortiSIEM is not an expensive solution."
"Fortinet FortiSIEM is cheaper compared to other products."
"Fortinet's products are not expensive, it is less than the competition."
"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."
"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."
"Fortinet FortiSIEM is very cost-efficient compared to other SIEM solutions."
"The solution is available for both, perpetual and subscription licenses."
"Pricing is acceptable for more than 90% of our customers, as they normally get discounts."
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Top Industries

By visitors reading reviews
Comms Service Provider
14%
Financial Services Firm
8%
Computer Software Company
8%
Manufacturing Company
7%
Financial Services Firm
9%
Comms Service Provider
9%
Construction Company
8%
Manufacturing 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: June 2026.
902,270 professionals have used our research since 2012.