LibreSign
Open-source electronic signature platform for PDF documents
About LibreSign
LibreSign is an open-source web application for electronically signing PDF documents. Built by the LibreCode cooperative, it integrates natively with Nextcloud and offers PKI-based digital certificates, hybrid signatures, QR code verification, and GDPR-compliant audit trails for secure document management.
Pros & Cons
Pros
- Fully open source with transparent, auditable codebase
- Native Nextcloud integration for seamless document workflow
- GDPR-compliant with built-in audit trails and data sovereignty
- Self-hostable for complete control over sensitive documents
- Cost-effective alternative to commercial e-signature platforms like DocuSign
Cons
- Documentation is sparse and can make initial setup challenging
- Requires Nextcloud infrastructure or technical expertise for self-hosting
- Smaller community compared to commercial alternatives means fewer plugins
- Limited features for bulk or enterprise-scale signing operations
Key Features
Digital Signatures with PKI
Uses PKI technology to generate digital certificate keys, ensuring document integrity and legal validity
Hybrid Signatures
Flexibility to choose between personal or system-generated digital certificates for signing documents
QR Code Verification
Signed documents include a QR code for instant authenticity verification by anyone
Real-time Signature Tracking
Monitor who has signed and who has not, with automatic reminder notifications
Nextcloud Integration
Native integration as a Nextcloud app, leveraging existing infrastructure for document storage and collaboration
End-to-End Encryption
Multi-factor authentication and encryption protect documents throughout the signing process
API Integration
REST API endpoints for connecting LibreSign with CRMs, ERPs, and other business applications
GDPR Compliance
Built-in audit logs, hashing algorithms, and revocation capabilities for full regulatory compliance
Pricing
- Full open-source version
- Nextcloud integration
- PKI signatures
- QR code verification
- API access
- Community support
- Managed hosting
- Priority support
- Custom integrations
- SLA guarantees
Best For
Government & Public Sector
Secure document signing for public organizations needing GDPR compliance and data sovereignty
Small Business Document Signing
Cost-effective e-signature solution for contracts, agreements, and internal approvals without expensive SaaS subscriptions
Nextcloud-Based Organizations
Extend existing Nextcloud deployments with native document signing capabilities
EU-Based Compliance
Organizations requiring GDPR-aligned e-signatures with full audit trails and data residency control
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