The Document Signing API with zero per-envelope fees.
Stop paying $11 per document. Deploy DocuSeal on Opsily's managed infrastructure to get a professional, legally-binding document signing API for one flat monthly price.
Why developers are leaving DocuSign
Legacy SaaS providers charge you for every signature. DocuSeal on Opsily gives you total volume freedom.
Pricing based on standard DocuSign API overage rates of $3-11 per envelope.
Finally, a document signing API that doesn't tax your growth.
Most document signing APIs are built on a 20-year-old business model: charging you for every single 'envelope' you send. This makes costs completely unpredictable. If your app becomes successful and your users sign more documents, your SaaS bill explodes.
DocuSeal changes the math. It is a mature, open-source alternative to DocuSign that provides a professional REST API, webhooks, and embedded signing flows. By hosting DocuSeal on Opsily, you own the infrastructure. You can send ten documents or ten thousand: your price stays the same.
Built for Modern Workflows
DocuSeal isn't just a 'cheap' alternative. It is a modern toolset designed for developers. It supports 10 field types, automated reminders, and produces PAdES-compliant digital signatures that are legally binding under ESIGN, UETA, and eIDAS. Integration is handled via a clean JSON API, making it significantly easier to implement than the complex JWT authentication flows required by legacy competitors.
Zero stress. Zero overages.
Our document signing API solution handles the server so you can focus on the signatures.
Unlimited signatures
Never worry about envelope limits again. Your DocuSeal instance on Opsily allows for unlimited documents, templates, and users without extra costs.
GDPR Compliance
Legacy SaaS APIs often store your sensitive data on US servers. With Opsily, your DocuSeal instance stays on German infrastructure, keeping your documents in the EU.
Automatic Backups
We take daily snapshots of your entire instance. If you ever need to roll back or recover a deleted template, your data is safe and ready to restore.
Built for teams who need reliability
98% Typical savings compared to DocuSign API
For teams sending 500+ documents per month, shifting to a flat-rate managed DocuSeal instance pays for itself in just two days.
Start Your 14-Day TrialShip your signing API in 3 minutes
Choose Your App
Select an app to get started.
Select DocuSeal
Choose DocuSeal from the Opsily app catalog. No configuration files or server setup required.
1-Click Deploy
Our automated system spins up your private, secure environment on European infrastructure.
Connect your API
Grab your API key and starting embedding signing flows into your app using our standard REST endpoints.
Flat-rate hosting for DocuSeal
No hidden fees. No per-user or per-envelope surcharges. Just predictable hosting.
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Need more resources or custom solutions?
Enterprise security by default
EU Data Residency
All DocuSeal instances are hosted in ISO 27001 certified data centers in Germany.
PAdES Compliant
DocuSeal generates PDF Advanced Electronic Signatures with full audit logs.
Daily Backups
Encrypted daily backups ensure your critical legal documents are never lost.
SSL Encryption
Encrypted communication using industry-standard TLS protocols.
Frequently Asked Questions
Yes. When you host DocuSeal on Opsily, you are paying for the server resources, not the number of files you sign. You can send as many signing requests and envelopes as your server resources allow. There are no per-document or per-user fees from Opsily. This makes it the most cost-effective document signing API for high-volume workflows.
Stop paying the growth tax.
Get a professional document signing API without the SaaS overhead. Deploy DocuSeal on Opsily today.