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Pandora FMS vs Security Onion comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Oct 9, 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

Pandora FMS
Ranking in Log Management
59th
Average Rating
9.2
Reviews Sentiment
7.6
Number of Reviews
22
Ranking in other categories
Network Monitoring Software (66th), Server Monitoring (26th), IT Infrastructure Monitoring (58th), Cloud Monitoring Software (38th)
Security Onion
Ranking in Log Management
22nd
Average Rating
7.8
Reviews Sentiment
7.2
Number of Reviews
4
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2026, in the Log Management category, the mindshare of Pandora FMS is 0.6%, up from 0.3% compared to the previous year. The mindshare of Security Onion is 1.6%, down from 4.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Log Management Mindshare Distribution
ProductMindshare (%)
Security Onion1.6%
Pandora FMS0.6%
Other97.8%
Log Management
 

Featured Reviews

Gabriel Glusgold - PeerSpot reviewer
Asociado/ at Infraestructura Informática
Personalized metrics; simplicity of data
My primary use case for Pandora is monitoring This solution has helped us improve our organization by allowing us to create a lot of metrics on several platforms, including Windows, Linux, and Unix. We then use these Pandora metrics to create an interface. We then pass the interface off to the…
Hiten Nandasana - PeerSpot reviewer
Angular developer at Flourish software
Centralized monitoring has strengthened threat detection and supports faster incident investigations
Security Onion is a completely open-source and free platform, making it a cost-effective solution that works smoothly and effectively for our organization. Security Onion integrates well with our existing tools, primarily using Linux systems in our organization, allowing us to monitor logs and manage threat detection and operations in the public cloud effectively. Security Onion is very helpful in meeting compliance requirements and supports regular standards for our environment. I advise organizations that use Linux or have network security knowledge to consider Security Onion, as it satisfies requirements such as threat detection and log management systems. I would rate this review eight out of ten.

Quotes from Members

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

Pros

"The solution has good dashboards and graphics."
"This product has allowed us to identify and correct certain issues that were affecting our solution."
"This tool has been of great help because we can manage faster solutions with the problems in our network and it helped us reduce our response time."
"We are able to control our business with this all-in-one monitoring tool."
"You can configure several types of architecture for high availability or load balancing."
"Pandora FMS (the Flexible Monitoring System) is an all-in-one package solution, and we can monitor our whole system with Service perspective."
"I like this solution a lot because it has a very large Hispanic community and the platform looks very friendly."
"In comparison with most monitoring software, this software is incredibly easy to use."
"Security Onion is the most mature solution in the market."
"The most valuable feature of Security Onion for security monitoring is its ability to find infected ports."
"We use Security Onion for internal vulnerability assessment."
"Security Onion is a completely open-source and free platform, making it a cost-effective solution that works smoothly and effectively for our organization."
 

Cons

"Improvements are needed for server and network discovery, including service-based discovery."
"I find that this software is resource heavy, and demands a lot of processing capacity."
"I sincerely believe that Pandora needs new ideas for functionality closer to advanced device security monitoring."
"They can also do more refinement in end-user usability because not everyone is strong technically, and people who aren't strong technically might be averse to the product, even though it has come a long way."
"Pandora could deliver better analytics out of the box. You can work around these limitations with the help of other tools like Grafana. The shortcomings are mostly on the graphical side. The built-in report generators are a bit limited in some areas."
"It would be useful if Pandora FMS included an ISO image (or «software appliance») for each big company that leases virtual private machines (VPS), just like in AWS."
"Third-party integration should be improved for some commonly used products such as Universal CMDB."
"Pandora FMS is an overall great monitoring solution, but it does not have a community that is as large as Zabbix or Nagios."
"The product is not easy to learn."
"Security Onion's user interface could be improved."
"The initial setup of the solution is a little bit difficult."
"Security Onion can be made easier to set up initially, as it is somewhat difficult at the start, but once configured, it becomes a great tool to use."
 

Pricing and Cost Advice

"My rule of thumb would be that if you need more than thirty agents, and you lack an automation tool such as Chef or Puppet, you will save a lot of time and money going to the Enterprise edition."
"Pandora FMS is easy to implement and the pricing of licenses is competitive."
"Only one payment and it includes support, updates, new versions, and access to the complete library of plugins except for SAP and z/OS."
"The Open Source Community Edition is great to just explore the software, or use it on medium-sized infrastructures."
"In terms of money, the Enterprise version is the cheapest that I have found after a market study."
"They are very competitive on the pricing side. That's one reason why my manager keeps using it."
"You have to pay for the number of agents and models that you are monitoring. I would rate the cost at three with one being the most expensive and five being the cheapest."
"You get the license and it includes updates, new versions, and access to the complete library of modules."
"Security Onion is an open-source solution."
"It is an open-source solution."
"Security Onion is a free solution."
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Top Industries

By visitors reading reviews
Comms Service Provider
20%
Construction Company
12%
Outsourcing Company
11%
Manufacturing Company
9%
Comms Service Provider
12%
University
12%
Government
9%
Construction Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business11
Midsize Enterprise4
Large Enterprise3
No data available
 

Questions from the Community

Ask a question
Earn 20 points
What is your experience regarding pricing and costs for Security Onion?
Security Onion does not require any cost, as it is open-source and free.
What needs improvement with Security Onion?
Security Onion can be made easier to set up initially, as it is somewhat difficult at the start, but once configured, it becomes a great tool to use. I assigned a rating of eight out of ten because...
What advice do you have for others considering Security Onion?
Security Onion is a completely open-source and free platform, making it a cost-effective solution that works smoothly and effectively for our organization. Security Onion integrates well with our e...
 

Comparisons

 

Overview

 

Sample Customers

Rakuten, Prosegur, Repsol, Teléfonica, Allianz, Ottawa Hospital, Hughes
Information Not Available
Find out what your peers are saying about Pandora FMS vs. Security Onion and other solutions. Updated: September 2026.
915,341 professionals have used our research since 2012.