API Documentation FAQ Discuss your requirements
✦
Enterprise-grade · Self-hosted · Full ownership

Why pay forever
for something you
could own?

DocuSign / PandaDoc / Zoho Sign charges you every month. Every year. Every envelope. Forever. Undersign is a fully enterprise-grade e-signature platform you buy once, deploy on your own infrastructure, customise it for your own workflow, and use it forever with zero per-signature fees.

Discuss your requirements → See cost comparison
5-year total cost of ownership
High-volume team · 30,000 signatures/mo
Estimated
DocuSign / PandaDocUndersign
Year 1: $5,000–$30,000
Year 2: +$30,000–$90,000
$0
Year 3: +$90,000–$150,000
$0
$150K+
Typical SaaS 5-yr spend
$15K+
Other annual costs
Upto 100%%
Saved perpetually
∞
Unlimited signatures No per-user fees, ever
$15K+
Misc annual costs
Deployed across industries with high signing volumes
Logistics & Transport
Education Platforms
Legal & Professional Services
Healthcare Organisations
SaaS & Technology
Real Estate & PropTech
Events & Sports Organisations
Logistics & Transport
Education Platforms
Legal & Professional Services
Healthcare Organisations
SaaS & Technology
Events & Sports Organisations
The renting problem

You don't own a single part of
your current e-signature setup

DocuSign, Adobe Sign, PandaDoc, and Zoho Sign: you are a tenant. The moment you stop paying, the platform disappears. Your data is on their servers. Your workflows depend on their uptime. Your costs are theirs to set.

Renting (SaaS)
Recurring fees that compound every year, often increasing at renewal
Per-envelope or per-user pricing that penalises you for growing
Documents and audit logs on vendor servers, meaning data sovereignty is lost
Rigid, template-only customisation. Their roadmap, not yours.
Platform risk: pricing changes, acquisitions, and service shutdowns
Zero asset built; that represents five years of spend with nothing to show for it
Owning (Undersign)
No recurring fees. No renewals. No surprises.
Unlimited signatures. Volume grows, but costs do not.
Self-hosted on your infrastructure or private cloud: your data, your servers.
Full source code ownership. Customise any workflow, any integration.
Zero vendor dependency. No risk of pricing changes or shutdowns.
A platform you own, control, and can build on for years.
Own it. Control it. Never pay per-signature again.

Every year you continue renting, you're choosing to pay for something you'll never own. At high volumes, the maths favour ownership decisively, usually from Year 1.

Cost comparison

The numbers don't need
a sales pitch

A straightforward comparison across the dimensions that matter to enterprise decision-makers: cost, control, and longevity.

Dimension DocuSign Adobe Sign / PandaDoc Undersign ✦
Annual spend (high volume) $150,000+/yr $20,000–$100,000+/yr $0/yr
5-year platform fees $750,000+ $100,000–$500,000+ $0
Per-envelope / per-user fees Yes, increasing with volume Yes, tiered pricing None. Unlimited. Forever.
Data hosting & sovereignty Vendor servers (US) Vendor servers Your infrastructure. Your control.
Customisation Templates only. No code access Limited workflow customisation Fully customizable. Built around your workflows
CRM / ERP integration Standard connectors only Standard connectors only Custom integrations for any system
Ownership Vendor-owned. You rent access. Vendor-owned. You rent access. Fully owned. Hosted on your infrastructure
Vendor risk Pricing, acquisition & shutdown risk Pricing, acquisition & shutdown risk Zero vendor dependency
Compliance ESIGN, eIDAS, SOC 2 ESIGN, eIDAS, SOC 2 ESIGN Act & eIDAS compliant

* SaaS pricing estimates based on publicly available enterprise tier data. Actual costs vary by contract and volume. Undersign pricing is tailored to your requirements, including deployment, customization, integrations, and support.

5-year cost model · 30,000 signatures/month
DocuSign enterprise
Per-envelope · annual subscription
$750K+
Adobe Sign / PandaDoc
High-volume tier · 5 years
$100–500K
Undersign
Self-hosted · fully owned
$0 recurring fees
Recurring platform savings
vs. DocuSign enterprise tier
$750K+
The maths of ownership

Stop paying a recurring fee for every signature

At high signing volumes, e-signature SaaS can become a significant and growing annual expense.

Self-host Undersign and bring the platform onto your infrastructure. You own the platform, control the deployment, and eliminate recurring platform and per-signature fees.

Discuss your requirements →
Platform capabilities

Enterprise-grade from day one.
Nothing stripped out.

Undersign ships as a fully functional enterprise e-signature platform, not a lite version. Every feature required for high-volume, compliance-grade signing.

Unlimited document signing
No per-envelope fees, no volume caps, no throttling. Send one document or one million; the cost is the same. Scale without a budget conversation.
Full data sovereignty
All documents, audit logs, and signature records live on your own infrastructure. Zero data exposure to third-party servers. GDPR, HIPAA, and sector-specific compliance made structurally simpler.
Full source code ownership
The platform is delivered with complete source code. Your development team can extend, customise, or integrate it into any existing system with no vendor approval required.
Custom workflow integration
Build signing workflows that match your existing processes, rather than generic ones from a SaaS template library. CRM, ERP, HRMS, and internal application integrations built to your exact specification.
Legal-grade compliance built in
ESIGN Act and eIDAS compliant signatures with full audit trail, tamper-evident document sealing, and certificate-based authentication. Legally enforceable in all major jurisdictions.
Multi-user, multi-team management
Role-based access control, department-level permissions, bulk sending, template management, and full administrative oversight. Built for organisations, not individuals.
Mobile signing experience
Full mobile-responsive signing flows for signatories, with no app download required. Works on any device, any browser, including high-volume use cases like field teams and event check-ins.
Tamper-evident audit trail
Every signature event, document access, and workflow state change is logged with cryptographic integrity. Full audit trail for legal, regulatory, and internal compliance requirements.
Scalable to any volume
Deployed on your own infrastructure means you control scaling: no throttling, no overage fees, and no conversations with a vendor account manager about hitting your plan limit.
Deployment options

Your infrastructure.
Your choice of where.

Undersign runs on your infrastructure, exactly where you want it. Our team handles the initial setup.

On-premise
Deployed directly on your own physical servers or data centre. Full air-gap capability for organisations with strict data residency requirements. Nothing leaves your walls.
Private cloud (AWS / Azure / GCP)
Deployed in your own cloud account, such as AWS, Azure, or Google Cloud. You own the environment, the data, and the access controls. Cloud scale, private ownership.
Hybrid deployment
Some teams prefer a split: critical document storage on-premise, processing infrastructure in a private cloud. We support hybrid architectures for organisations with complex compliance requirements.
Case study

From $28K/year to
zero. Permanently.

A transport and logistics firm processing 30,000+ signatures a month across DocuSign and PandaDoc. Two platforms. Escalating costs. Limited ability to customise signing workflows for their onboarding process.

After implementing Undersign: recurring costs eliminated entirely. Custom onboarding and consent workflows built to their exact specification. Signing volume now scales with onboarding demands, requiring no budget approval.

$0/yr
Recurring e-signature spend after implementation
30K+
Signatures processed monthly, with unlimited signing at no extra cost
<1yr
Time for full licence cost recovery
100%
Custom workflows built to their process rather than a template
"The thing no one tells you when you sign your DocuSign contract is that you're committing to paying that, and more, every single year. The moment we saw the Undersign cost model, the decision was straightforward. We paid less in the first month than we used to pay in a quarter."
HO
Head of Operations
Transport and logistics firm · 30,000+ signatures/month
Is this right for you?

Undersign is built for
organisations that think in decades

Not every organisation is ready for ownership. Here are the signals that this is the right move.

High and growing signing volumes
You're processing 1,000+ documents a month today and that number is increasing. Every additional envelope sent through a SaaS platform costs you more. Ownership inverts this: more volume, same cost.
Strict data compliance requirements
Healthcare, legal, financial services, or government-adjacent organisations that cannot store sensitive documents on third-party servers. On-premise deployment eliminates the compliance exposure entirely.
Workflow customisation beyond SaaS limits
Your signing process doesn't fit a template library. You need multi-step workflows, conditional routing, or deep integration with internal systems that no SaaS platform will ever build for you specifically.
Frustrated with escalating SaaS renewal costs
You've been through one or more DocuSign / PandaDoc renewals where the price went up, the value didn't, and the contract felt non-negotiable. The economics of ownership look dramatically better when you've lived through this.
Enterprise IT teams who prefer control
Your IT or security team is uncomfortable with vendor-managed infrastructure for document signing. Self-hosted deployment means your own security controls, your own backup strategy, your own uptime SLAs.
CFOs looking to turn opex into capex
A one-time cost is a capital expenditure (a depreciable asset). Recurring SaaS fees are operating expenses. For organisations managing EBITDA carefully, the accounting treatment alone is a meaningful consideration.
ENTERPRISE OWNERSHIP

A different way to buy e-signatures
Own the platform. Eliminate recurring fees.

Undersign Self-Hosted gives your organization a fully featured e-signature platform deployed on your infrastructure. Enterprise pricing is tailored to your deployment, customization, integration, and support requirements.

Undersign Self-Hosted
Fully featured e-signature platform you own and control, hosted on your infrastructure.
✓
Fully owned platform
✓
Unlimited signatures
✓
No per-signature fees
✓
Documentation & knowledge transfer (included)
✓
Initial setup & base customisation (included)
✓
ESIGN Act & eIDAS compliant
✓
No recurring platform fees
Discuss your requirements →

Optional add-ons

Custom workflow development
Bespoke signing workflows, custom integrations with your CRM, ERP, or HRMS, and UI customisation to match your brand and business processes.
Quoted on requirement
Ongoing support & maintenance
Optional access to our team for technical support, updates, security patches, and ongoing assistance.
Optional · Quoted based on requirements
Initial setup & base customisations
Deployment on your infrastructure, initial configuration, basic brand customisation, and structured knowledge transfer for your development team.
Included
Have a specific requirement?
Tell us about your signing volumes, workflows, integrations, and deployment requirements. We'll discuss the appropriate setup and pricing for your organization.
FAQ

Questions,
answered

Anything else? Email us at hello@undersign.app; we respond within one business day.

Yes. The full SaaS platform is available to use for free with no time-limited trial. Sign up, use it with your own data, and evaluate the complete workflow before discussing a self-hosted deployment.
Yes. The platform is deployed by our team on your infrastructure, so you don't need internal developers to get started. For ongoing customisation and integrations, our team can handle those as a quoted add-on. Many of our clients operate the platform day-to-day without any technical resource.
Yes. Undersign produces ESIGN Act and eIDAS-compliant electronic signatures with full audit trail, tamper-evident document sealing, and certificate-based authentication. Signatures are legally enforceable in all major jurisdictions. If you have specific jurisdiction or sector requirements, bring them to the demo and we'll address them directly.
Undersign can be deployed on your own physical servers (on-premise), in your private cloud account (AWS, Azure, GCP), or as a hybrid of both. The specific infrastructure requirements are discussed during the demo and scoped to your environment. If you have existing infrastructure, we deploy to it. If not, we can advise on what's needed.
The platform is designed to run independently; it is not dependent on our ongoing involvement to function. For organisations that want peace of mind, we offer optional support and maintenance retainers covering regular updates, security patches, and direct technical access. These are genuinely optional, not a requirement for the platform to operate correctly.
Building a compliant e-signature platform from scratch typically requires 6–18 months of development, a specialist team, and ongoing security and compliance maintenance, a cost easily exceeding $500,000 before you send the first document. Undersign delivers the same outcome: full ownership, full source code, self-hosted, at a fraction of that cost and timeline, deployed in days not months.
Yes, fully. Because you own the source code, any customisation is possible. Our team can handle customisation as a scoped, quoted project, or your own developers can work directly with the codebase. This includes custom signing workflows, CRM and ERP integrations, brand theming, and bespoke document routing logic.
✦ Stop renting. Start owning.

Your e-signature platform
Your infrastructure. Your control.

A fully featured e-signature platform designed for organizations that want to own their infrastructure, control their workflows, and eliminate recurring platform fees.

Discuss your requirements →