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Fortinet FortiSIEM vs Graylog Security 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

Fortinet FortiSIEM
Ranking in Security Information and Event Management (SIEM)
15th
Average Rating
7.6
Reviews Sentiment
6.2
Number of Reviews
75
Ranking in other categories
AI Observability (26th)
Graylog Security
Ranking in Security Information and Event Management (SIEM)
61st
Average Rating
8.6
Reviews Sentiment
7.5
Number of Reviews
2
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of November 2026, in the Security Information and Event Management (SIEM) category, the mindshare of Fortinet FortiSIEM is 2.2%, down from 3.4% compared to the previous year. The mindshare of Graylog Security is 0.6%, up from 0.5% 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%
Graylog Security0.6%
Other97.2%
Security Information and Event Management (SIEM)
 

Featured Reviews

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.
Tony Zafiropoulos - PeerSpot reviewer
Owner/ Chief Engineer at Fixvirus.com
Aggregates logs in one place and helps to review data points
We tried Graylog Security, starting with their inexpensive open-source version. We tested it out and continued using it for a while. As for the main differences between Graylog Security and other vendors, some users might prefer cloud-based platforms over on-premises solutions. It isn't inherently cloud-native, but that might not matter much for some.

Quotes from Members

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

Pros

"It provides extensive logging and record-keeping for internal networks, cloud applications, and services as well as perimeter physical network security."
"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."
"In large-sized medium-sized and a small-sized organizations, it improves the ability to quickly drill down into events that occur, perform analysis, and find root cause."
"Analytics is the most valuable feature, and the business service summaries in the dashboards and the correlations for the SIEM are also valuable features."
"FortiSIEM is a great tool for making security processes transparent."
"It's easy to manage. There's a web interface and a command line, depending on what the user is comfortable with. There's a large knowledge base available, and the support is timely."
"Fortinet FortiSIEM is less costly than other products and is available 24/7."
"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."
"We use the solution to collect logs."
"The tool aggregates logs. We can see the logs in one place."
 

Cons

"One of the things that actually opened a ticket about (and they couldn’t help me) is when traffic is leaving our network, it’ll only report the source."
"The support of the product changed recently, and I don't think it's for the better. They should work to improve the support they offer to clients."
"The way that upgrades are handled could be a bit cleaner."
"The initial setup was quite complex."
"The solution's interface could be modernized and improved."
"The graphs on the user interface could be improved as we often experience glitches."
"There could be improvements like introducing some solutions directly into FortiSIEM to avoid the need for separately purchasing additional tools like FortiStore."
"While AccelOps tries to be a “Jack of All”, it unfortunately is a master of none. This means that the product has poor support for some third-party security technologies, such as data loss prevention (DLP), application security testing, network forensics and deep packet inspection (DPI)."
"Graylog Security needs to incorporate security scorecards."
 

Pricing and Cost Advice

"This is probably more on the lower cost end of the spectrum compared to competing products. Fortinet's license model is based on events per second, which makes sense, but that's not typical. It makes it very hard to calculate what your costs are going to be as you scale the platform because some log sources, such as firewall logs, are very noisy, and there are lots and lots of events per second, but some of them are not. So, it becomes a bit of a science experiment trying to guess what your costs are going to be as you scale the solution. This is where other competing products perhaps have a more straightforward license model."
"Please be cheaper and more simplified."
"The tool is really expensive. For what the tool does for our team, the price is fair."
"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's products are not expensive, it is less than the competition."
"Manageable, however would be better as pay as you go versus CapEX."
"The price is competitive."
"I rate the tool's pricing a one out of ten."
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Top Industries

By visitors reading reviews
Outsourcing Company
11%
Comms Service Provider
10%
Financial Services Firm
8%
Construction Company
8%
Educational Organization
12%
Comms Service Provider
9%
Healthcare Company
8%
Retailer
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business34
Midsize Enterprise22
Large Enterprise24
No data available
 

Questions from the Community

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...
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Also Known As

FortiSIEM, AccelOps
No data available
 

Overview

 

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.
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Find out what your peers are saying about Fortinet FortiSIEM vs. Graylog Security and other solutions. Updated: September 2026.
920,769 professionals have used our research since 2012.