OpenMSP
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ClamAV

Endpoint Security (Antivirus/EPP)

Open Source
Free Tier
Self-hosted
OpenMSP Score
57
40
Reddit Impact Score
Github Score
159M
6KStars
881Forks
11KCommits
GNU General Public License v2.0License
Jul 5, 2026Last commit

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ClamAV is an open-source antivirus engine designed for detecting trojans, viruses, malware, and other malicious threats. It offers high-performance scanning, regular signature updates, and integration capabilities with mail servers and other applications.
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Key Features

Multi-Platform Support

Cross-platform antivirus engine supporting Windows, Linux, macOS, BSD, and many other operating systems

Real-Time Protection

On-access scanning with clamd daemon providing real-time malware detection and prevention capabilities

Mail Gateway Integration

Designed especially for email scanning on mail gateways with Milter interface and SMTP integration

Comprehensive File Format Support

Supports multiple file formats including archives (ZIP, RAR, TAR), executables, documents (PDF, Office), and more

Automatic Signature Updates

FreshClam utility provides automatic virus definition updates multiple times daily from global threat intelligence

Pros and Cons

Pros

Completely Free and Open Source

Full-featured antivirus solution available at no cost with complete source code transparency under GPLv2 license

Lightweight and Efficient

Low resource consumption making it ideal for servers, embedded systems, and resource-constrained environments

Excellent for Mail Servers

Industry standard for mail gateway scanning with robust integration capabilities for email security

Community-Driven Development

Large open-source community ensuring continuous development, security updates, and feature improvements

Cons

Command-Line Interface

Primarily command-line based with limited graphical interfaces, requiring technical expertise for configuration

Basic Detection Capabilities

May have lower detection rates compared to commercial solutions for advanced or zero-day threats

Limited Real-Time Protection

Real-time protection availability varies by platform and may require additional configuration

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.