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  3. Security Onion
Logo of Security Onion

Security Onion

bySecurity Onion
in Intrusion Detection and Prevention Systems (Retired)
4.4

Overview

Product Information on Security Onion

Updated 13th October 2025

What is Security Onion?

Security Onion is a software for network security monitoring, intrusion detection, and log management. The software aggregates data from multiple sources to provide comprehensive network visibility and facilitates the detection, investigation, and response to security incidents. Security Onion integrates tools for full packet capture, traffic analysis, and threat hunting, enabling security teams to identify suspicious activity, analyze network events, and correlate security data. The software offers indexing and search capabilities for logs and network metadata, supporting the efficient management and analysis of security information to address challenges in incident detection and response within organizational networks.

Security Onion Pricing

Security Onion software uses an open-source licensing model, allowing users to download and use the software without a subscription fee. Support and deployment services are offered for a fee and are structured as annual subscriptions or professional service agreements, depending on the scope and type of support required.

Overall experience with Security Onion

Security Architect
10B - 30B USD, Banking
FAVORABLE

“No-Cost Software Offers Support for Custom Development”

5.0
May 25, 2024
This text serves as a placeholder and does not reflect the user’s review responses or opinions. This text serves as a placeholder and does not reflect the user’s review responses or opinions. This text serves as a placeholder and does not reflect the user’s review responses or opinions.
Sr ICS CyberSecurity Advisor
3B - 10B USD, Consumer Goods
CRITICAL

“Product is open source and cost-effective, however it requires significant customization”

3.0
Oct 8, 2019
This text serves as a placeholder and does not reflect the user’s review responses or opinions. This text serves as a placeholder and does not reflect the user’s review responses or opinions. This text serves as a placeholder and does not reflect the user’s review responses or opinions.

About Company

Company Description

Updated 24th March 2025

Security Onion Solutions, founded in 2014 by Doug Burks, provides a free and open source platform for intrusion detection, network security monitoring, and log management. The platform, called the Security Onion project, was started by Doug Burks in 2008 to analyze network layers. Additionally, Security Onion Solutions offers professional services and training related to the use of their platform.

Company Details

Updated 29th April 2025
Company type
Private
Year Founded
2014
Head office location
Evans, United States
Number of employees
11 - 50
Website
https://securityonionsolutions.com

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Key Insights

A Snapshot of What Matters - Based on Validated User Reviews

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Peer Discussions

Security Onion Reviews and Ratings

4.4

(42 Ratings)

Rating Distribution

5 Star
43%
4 Star
50%
3 Star
7%
2 Star
0%
1 Star
0%
Why ratings and reviews count differ?
  • Security Architect
    10B+ USD
    Banking
    Review Source

    No-Cost Software Offers Support for Custom Development

    5.0
    May 25, 2024
    The software is free and totally functional without cost to run. Purchasing support hours can assist with setup and troubleshooting. These hours can also be used for custom development. The staff are incredible with support and development. There is a huge list of already supported data sources but they will develop the ability for more if needed.
  • Security Architect
    10B+ USD
    Banking
    Review Source

    No-Cost Software Offers Support for Custom Development

    5.0
    May 25, 2024
    The software is free and totally functional without cost to run. Purchasing support hours can assist with setup and troubleshooting. These hours can also be used for custom development. The staff are incredible with support and development. There is a huge list of already supported data sources but they will develop the ability for more if needed.
  • Read All 42 Reviews

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  • Market Guide for Intrusion Detection and Prevention Systems (Retired)
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Reviewer Insights for: Security Onion
Deciding Factors: Security Onion Vs. Market Average
Performance of Security Onion Across Market Features

Security Onion Likes & Dislikes

Like

- Cost - Support - Flexibility

Like

- Cost - Support - Flexibility

Like

- Cost - Support - Flexibility

Dislike

It requires significant customization to achieve target state

Dislike

It requires significant customization to achieve target state

Dislike

It requires significant customization to achieve target state