View all SIEM / Threat Detection Alternatives
Best Free Alternatives to AlienVault USM (LevelBlue)
Stop paying $1,075+/mo (Essentials). Discover professional-grade tools that won't break your budget.
Category: SIEM / Threat DetectionVerified for 2025
Top Recommended Replacements
Wazuh
FREEBest Direct Replacement
Why we like it
The modern evolution of OSSEC (which AlienVault was originally built on); combines Host Intrusion Detection (HIDS), Log Analysis, and Vulnerability Detection in one free agent; massive community support.
Keep in mind
Requires self-hosting (or paying for their cloud); steeper learning curve than a managed SaaS.
Security Onion
FREEBest for Network Visibility
Why we like it
A complete Linux distro for SOCs; bundles the best network tools (Zeek, Suricata) with the Elastic Stack; superior to AlienVault for 'Network Security Monitoring' (NSM) and deep packet inspection.
Keep in mind
Heavy hardware requirements; focuses more on network traffic than endpoint compliance.
Graylog Security
FREEBest for Log Management
Why we like it
If you primarily used AlienVault for 'Log Aggregation' rather than threat detection, Graylog is faster and easier to search; excellent dashboarding for IT operations.
Keep in mind
The 'Security' features (SIEM rules) are part of the paid Enterprise license.
Elastic Security (ELK)
FREEBest for Customization
Why we like it
The industry standard for search; allows you to build a SIEM exactly how you want it; 'Elastic Agent' provides endpoint security features similar to AlienVault.
Keep in mind
Advanced security rules and machine learning features are locked behind the expensive 'Platinum' license.
Blumira
FREEBest for SMBs
Why we like it
A 'SIEM for IT Admins' (not security experts); free edition covers Microsoft 365 logs; extremely easy setup compared to AlienVault; automates threat response.
Keep in mind
Free tier has limited data retention (14 days).
Uptycs
Best for Cloud Native
Why we like it
Built on osquery; excels at monitoring modern cloud environments (AWS, Kubernetes, Containers) where AlienVault's legacy appliance model struggles.
Keep in mind
Paid enterprise tool (though cheaper/more modern than LevelBlue).
Need more options?
Explore our full directory of SIEM / Threat Detection software alternatives.
Browse the SIEM / Threat Detection Hub