Piler
AI-powered email archiving with on-premise intelligence
Founded
N/A
Starting Price
Free
Category
Email Clients
Last updated March 18, 2026
About Piler
Piler is an email archiving solution available as both open-source and enterprise editions. It captures emails at the SMTP level for tamper-proof compliance archiving, with AI-powered features including email summarization, semantic search, ML phishing detection, and PII recognition, all running on your own infrastructure.
Pros & Cons
Pros
- Open-source edition available at no cost for basic email archiving needs
- On-premise deployment keeps data within your jurisdiction for GDPR and regulatory compliance
- AI features run locally without sending data to external cloud services
- Vendor-agnostic archiving works with any email system via SMTP
- Intelligent deduplication and compression dramatically reduce storage costs
Key Features
SMTP-Level Capture
Archives emails at the SMTP layer before users can delete them, ensuring complete and tamper-proof retention
AI Email Summarization
On-premise LLM generates concise summaries of emails and threads for quick context understanding
Semantic Search
ML-powered search that understands meaning and context, finding emails by concept rather than just keywords
ML Phishing Detection
Machine learning scanner detects phishing emails with 95-98% accuracy for proactive threat identification
PII Recognition
Automated detection of personally identifiable information across archived emails for data protection compliance
Intelligent Deduplication
Stores attachments only once with efficient compression, significantly reducing storage requirements
Legal Hold & eDiscovery
Apply legal holds to preserve evidence and export findings in standard formats for legal teams
Pricing
Open Source
Free
- Core email archiving
- Full-text search
- SMTP capture
- Community support
- Self-hosted
Best For
Regulatory Compliance
Healthcare, finance, and legal firms use Piler for HIPAA, SEC/FINRA, and GDPR-compliant email retention
Hybrid Email Archiving
Organizations running M365 alongside on-premise Exchange archive everything in one unified system
Data Sovereignty
European organizations keep email archives on-premise within their jurisdiction to meet local data residency requirements
MSP Multi-Tenant Archiving
Managed service providers archive emails for multiple clients across different email platforms
