Piler
Email Security
Open Source
Free Tier
Self-hosted
E
EnterpriseOpenMSP Score
3732
Reddit Impact Score
Github Score
1M330Stars
46Forks
2KCommits
OtherLicense
Jul 5, 2026Last commit
Alternative Vendors
Commercial Alternatives
Piler is a feature-rich open source email archiving solution that provides a viable alternative to commercial email archiving products. It offers comprehensive email archiving capabilities including legal hold, retention policies, deduplication, digital fingerprinting, and full-text search. Built with a modern microservices architecture, Piler supports deployment on physical servers, VMware, Hyper-V, cloud platforms (AWS, Azure, GCP), and Docker containers. The solution includes a PHP-based GUI with multiple authentication methods (AD/LDAP, SSO, Google OAuth, 2FA, IMAP, POP3) and supports both Google Apps and Office 365 integration. Piler is designed for organizations requiring secure, compliant, and intelligent email archiving with features like ML-powered semantic search, phishing detection, and DLP policies.
Key Features
Multi-Tenancy
Separates tenant data on file, database, and index levels
Email Archiving
Real-time archiving of all inbound emails with automatic retention rules and legal hold capabilities
Semantic Search
ML-powered search that understands meaning and context, not just keywords
ML Phishing Detection
Advanced machine learning models detect phishing attempts with 95%+ accuracy
Legal Hold
Protect critical emails from deletion with audit trails and compliance-ready preservation
End-to-End Encryption
Encrypted email storage with digital fingerprints to verify message integrity
Pros and Cons
Pros
Open Source
Fully open source with GPL-3.0 license providing transparency and community development
No Vendor Lock-In
Export data anytime in standard RFC-2822 EML format
Deployment Flexibility
Deploy anywhere: physical servers, VMware, Hyper-V, AWS, Azure, GCP, or Docker
Modern Architecture
Container-based microservices design with standard open-source components
ML-Enhanced Security
Built-in PII detection, ML-based phishing detection (95%+ accuracy), and DLP policies
Cons
Learning Curve
Requires technical expertise for initial setup and configuration
Community Support
Primary support through GitHub Issues and Discussions rather than dedicated support team
Feature Comparison
Comments
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OpenMSP Score
3732
Reddit Impact Score
Github Score
1M330Stars
46Forks
2KCommits
OtherLicense
Jul 5, 2026Last commit
Frequently Asked Questions
Getting Started
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Platform Information
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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
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