OpenMSP
Prelude SIEM logo

Prelude SIEM

Security Information and Event Mgmt. (SIEM)

Open Source
Free Tier
E
Enterprise
Self-hosted
OpenMSP Score
34
6
Reddit Impact Score
Github Score
107
43Stars
5Forks
5Commits
Jun 12, 2016Last commit

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Prelude SIEM is an open-source security information and event management system built on the IDMEF standard (RFC 4765). Originally developed by SoundCloud, it offers both a free OSS version and a commercial edition. The system provides real-time monitoring, event correlation, and threat detection with native compatibility for multiple IDS systems including Snort, Suricata, OSSEC, Wazuh, and over 30 types of system logs. While the OSS version has performance limitations for small environments, the commercial version delivers enterprise-grade capabilities with enhanced scalability and professional support.
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Key Features

Real-time Security Event Management

Collects, normalizes, sorts, aggregates, correlates and reports all security-related events independently of the product brand or license using IDMEF format

Advanced Threat Detection

Uses sophisticated correlation engine and real-time monitoring to detect and respond to threats promptly with comprehensive threat intelligence

Multi-Sensor Integration

Native compatibility with multiple IDS systems including Snort, Suricata, OSSEC, Wazuh, Samhain, and over 30 types of system logs

Web-based Management Interface

Ergonomic web interface for easy management and monitoring with comprehensive visibility across the entire IT infrastructure

Pros and Cons

Pros

Open Source Flexibility

Being open-source allows organizations to customize and extend capabilities to suit their unique security requirements

Cost-Effective Solution

Provides enterprise-grade security features at a significantly lower cost compared to proprietary SIEM systems

Standards Compliance

Built on IDMEF standard (RFC 4765) ensuring interoperability with various security tools and systems

Cons

Limited Performance in OSS Version

Open source version has significantly lower performance compared to commercial edition, limiting scalability

Smaller Community Support

Limited user base results in less readily available community support and resources compared to more popular SIEM solutions

Feature Limitations in Free Version

OSS version lacks essential capabilities like advanced reporting and comprehensive log management

Feature Comparison

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Frequently Asked Questions

Getting Started

OpenMSP is The MSP Knowledge Hub & Community Platform designed specifically for Managed Service Providers seeking to optimize their technology stack, reduce vendor costs, and discover open-source alternatives. We combine a comprehensive vendor directory, open-source solution catalog, and integrated community discussions to help MSPs make informed decisions.
Yes, completely free. Browse vendors and tools, read comparisons, and join community discussions - no cost, no registration required. OpenMSP is community-supported and focused on empowering MSPs to reduce costs and improve operational efficiency through open-source technology.
We help MSPs identify cost-effective alternatives to expensive commercial solutions, provide transparent vendor information, and connect you with proven open-source alternatives. Our platform enables MSPs to make informed decisions about their technology investments.
No account required for browsing vendors, reading comparisons, or accessing community content. Creating a free account with SSO (Microsoft, Google, or Slack) allows you to participate in discussions and save your favorite tools.

Platform Information

OpenMSP is currently community-supported. We focus on providing value to the MSP community first. Any future monetization will keep the core platform free for MSPs while maintaining our independence and commitment to unbiased information.
We focus exclusively on MSP needs with transparent vendor information and open-source alternatives. No vendor partnerships or sponsored listings - just honest, community-driven information to help MSPs make better technology decisions. Our biggest value is our community where MSPs help each other with questions, setup guidance, and sharing real-world experiences.
Our community of MSP professionals helps verify and update information. We also maintain direct research on tools and vendors to ensure accuracy. Community members can report outdated information, and we work to keep everything current.
OpenMSP was founded by Michael Assraf, who has extensive experience in the MSP industry and product leadership. As the former CEO & Founder of Vicarius, Michael grew a startup from $0 to $9M ARR with 500+ customers and deep experience working with MSPs, partners, and fundraising. OpenMSP represents his commitment to empowering the MSP community through better technology decisions and cost optimization.

Open-Source Tools & Alternatives

We assess tools based on active development, community size, documentation quality, production deployments by MSPs, and available support options. Tools must meet strict criteria for reliability and enterprise readiness.
Many open-source projects offer multiple support options including community forums, commercial support from vendors, professional services, and our community discussions where experienced MSPs share implementation guidance.