OpenMSP
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Graylog

Security Information and Event Mgmt. (SIEM)

Open Source
E
Enterprise
Paid Plans
Self-hosted
OpenMSP Score
92
88
Reddit Impact Score
Github Score
474M
8KStars
1KForks
29KCommits
OtherLicense
Jul 8, 2026Last commit

Alternative Vendors

Elastic Stack (ELK)
Elastic Stack (ELK)
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Wazuh
Grafana Loki
Grafana Loki

Commercial Alternatives

Todyl
Todyl
Splunk Enterprise Security
Splunk Enterprise Security
Microsoft Sentinel
Microsoft Sentinel
LogRhythm NextGen SIEM
LogRhythm NextGen SIEM
Graylog is a comprehensive open-source log management platform that combines powerful search capabilities, real-time analysis, and SIEM functionality. It uses Elasticsearch/OpenSearch as its storage backend with MongoDB for metadata, providing end-to-end log management with collection, storage, search, and visualization. Key features include streams & pipelines for real-time log categorization, sophisticated processing rules, configurable alerting system, and content packs for common log sources. Graylog offers both open-source and commercial editions, with enterprise features available for larger deployments. The platform is particularly valued for its balance between simplicity and power, offering more integration than bare Elasticsearch while being more focused on logs than general-purpose platforms. Released under Server Side Public License (SSPL) v1.
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Key Features

Real-time Log Analysis

Powered by Elasticsearch integration for lightning-fast search and analysis of log data in real-time, enabling swift threat detection and response

SIEM Capabilities

Advanced Security Information and Event Management with threat intelligence, anomaly detection, correlation engine, and MITRE ATT&CK framework integration

Data Lake Integration

Built-in data lake with selective retrieval, tiered storage (hot, warm, archive), and preview capabilities for cost-effective long-term data retention

Illuminate Content Hub

Ready-to-use content packs with parsing rules, pipelines, and lookup tables that normalize data to Graylog schema for streamlined analysis

Flexible Deployment Options

Available as self-managed, cloud, or hybrid deployments with support for Kubernetes, Docker, and multi-cloud environments

Pros and Cons

Pros

Excellent Cost-to-Performance Ratio

Offers powerful SIEM and log management capabilities at a fraction of the cost of competitors like Splunk, with free open-source version available

Powerful Search and Analysis

Elasticsearch-powered search engine provides extremely fast search capabilities across millions of log records in seconds

Strong Community Support

Large active community with over 50,000 installations worldwide, extensive documentation, and regular updates

No Vendor Lock-in

Open architecture allows for flexibility and prevents vendor lock-in, enabling gradual upgrades and customization

Cons

Steep Learning Curve

Initial setup and configuration can be complex, especially for users without deep technical expertise in log management systems

Resource Intensive

Requires significant infrastructure resources, particularly for Elasticsearch backend, and can be challenging to scale properly

Limited Visualization Options

Dashboards and reporting functionality are less intuitive compared to specialized visualization tools, with limited graphics options

GUI Inconsistency

Frequent UI changes can make the interface less user-friendly and require ongoing training for users

Feature Comparison

Comments

Nia Mensah

Nia Mensah

Jun 26, 2025

Powerful SIEM for MSP Security Operations

As a SOC analyst, Graylog real-time analysis capabilities help us detect threats across client networks quickly. The API security features are particularly valuable for protecting client applications.

Isaiah HuntSecureFlow Partners

Isaiah Hunt • SecureFlow Partners

Jun 26, 2025

Essential for Multi-Client Log Management

Graylog centralized log management is crucial for our MSP operations. Being able to analyze terabytes of client data across multiple environments with SIEM capabilities gives us unparalleled visibility.

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.