Self-Hosted Platform

Sign Unlimited

Stop paying more because you sign more.

Your growth shouldn't increase your software bill. Sign Unlimited is a fixed-cost, self-hosted signing platform with no per-transaction fees, running on infrastructure you control.

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Sign Unlimited illustration

Key features

Unlimited Usage

Unlimited Usage

No per-envelope, per-user, or per-signature fees. Process unlimited signatures with predictable costs.

Self-Hosted Deployment

Self-Hosted Deployment

Deploy on cloud, on-premise, or hybrid infrastructure you control. Your platform, your rules.

Dedicated Platform

Dedicated Platform

Single-tenant deployment operated exclusively by your organization. No shared infrastructure.

Fully Brandable

Fully Brandable

Fully customizable branding, domains, and signing experience. Your customers see only your brand.

Nutrient-Powered

Nutrient-Powered

Built on the Nutrient Document Engine SDK for PDF processing and manipulation.

Data Ownership

Data Ownership

All documents and metadata remain in your environment. Complete control over data retention and deletion.

API-First Architecture

API-First Architecture

REST APIs for deep system integration. Embed signing into your existing applications and workflows.

Enterprise Integration

Enterprise Integration

Designed to integrate with your identity providers, audit systems, and security infrastructure.

Ownership

Your Signing Platform, Fully Owned

Unlike SaaS signing solutions, Sign Unlimited runs entirely on your infrastructure. Deploy on AWS, Azure, GCP, or your private data center. Your IT team manages it. Your security policies govern it. Your data stays in the environment you choose.

  • Deploy anywhere: public cloud, private cloud, or on-premise
  • Source code available for purchase
  • Full database and storage ownership
  • Custom retention and deletion policies
  • Identity provider integration
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Your Signing Platform, Fully Owned
Economics

Predictable Costs at Any Volume

Traditional eSignature platforms charge per envelope, per signature, or per user. At high volume, those costs climb with your success. Sign Unlimited's one-time licensing model means your cost-per-signature approaches zero as volume increases.

  • One-time licensing fee
  • Optional enterprise support subscription
  • Zero usage-based fees
  • Cost-per-signature approaches zero at scale
  • Built for high-volume economics
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Predictable Costs at Any Volume
Customization

Your Brand, Front and Center

Sign Unlimited is designed for complete brand customization. Every customer touchpoint displays your brand identity. Customize the signing experience, email templates, and portal interface to match your corporate identity.

  • Complete visual customization (logos, colors, typography)
  • Custom domain support (sign.yourcompany.com)
  • Branded email notifications and templates
  • Customizable signing ceremony UI
  • Multi-brand support for holding companies
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Your Brand, Front and Center

Use cases

High-Volume Enterprises

Organizations processing thousands of documents daily benefit from unlimited signing with predictable economics.

Regulated Industries

Financial services, healthcare, and government agencies requiring complete data control and auditability.

SaaS & Platform Companies

Software companies embedding signing capabilities into their products under their own brand.

Global Organizations

Multinational enterprises with data residency requirements across multiple jurisdictions.

Deployment Responsibility

Sign Unlimited is deployed and operated by the customer or their implementation partner.

Customer Managed Responsibility

Customer Manages

  • •Infrastructure & hosting environment
  • •Security configuration & hardening
  • •Uptime, backups & disaster recovery
  • •Compliance controls & auditing
Propper Deliverables

Propper Provides

  • •Licensed Sign Unlimited software
  • •Documentation & deployment guides
  • •Optional enterprise support subscription
  • •Software updates & security patches

Technical Requirements

What you need to deploy Sign Unlimited in your environment.

Nutrient Document Engine License

Nutrient Document Engine License

Required dependency

Sign Unlimited is built on the Nutrient Document Engine SDK. Customers must procure and maintain an active Nutrient license separately.

Learn about Nutrient
Infrastructure Requirements

Infrastructure Requirements

Minimum specifications

  • • Linux server (Docker supported)
  • • 8GB+ RAM minimum
  • • PostgreSQL database
  • • Optional: Redis for caching
  • • Optional: S3-compatible object storage

Important Notes

  • • Propper does not resell or sublicense Nutrient licenses
  • • Compliance and security posture depend on customer deployment configuration

Sign Unlimited FAQ

Sign Unlimited is a self-hosted electronic signature platform licensed for unlimited transactions at a fixed cost. Unlike per-envelope SaaS models, Sign Unlimited lets organizations deploy signing infrastructure on their own servers with no per-transaction fees, giving complete control over data residency and compliance posture.

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Docusign®, Adobe Sign® and Acrobat Sign®, OneSpan®, PandaDoc®, and Dropbox Sign® are registered trademarks of Docusign, Inc., Adobe Inc., OneSpan Inc., PandaDoc, Inc., and Dropbox, Inc., respectively. Propper® is a registered trademark of PropperDocs, Inc. Nutrient® and Nutrient Document Engine are trademarks of their respective owner. Propper® Sign Unlimited is built on the Nutrient Document Engine SDK; Nutrient licenses are procured by the customer directly and are not resold or sublicensed by PropperDocs, Inc.

PropperDocs, Inc. is not affiliated with, endorsed by, or sponsored by these companies.