Open source esignature platform with a REST API
No per-seat fees. No document limits. No data leaving your server. Deploy DocuSeal on your infrastructure or use Opsily's managed EU hosting.
Why Opsily for your open-source eSignature platform
Running an open-source eSignature platform yourself takes DevOps work. Opsily handles the infrastructure so you keep the control.
REST API without the mess
Embed document signing into your workflows using DocuSeal's official REST API. Integrate with n8n, Zapier, or custom code. No webhook delays. No per-request fees. Your API calls stay local if you self-host.
EU server, zero data brokers
GDPR auditors ask one question: where does signing data live? On Opsily, DocuSeal runs on German servers. No US clouds. No third-party payment processors touching your documents. Compliance risk drops to nearly zero.
Flat-rate, no per-envelope trap
DocuSign charges $25/user/month minimum, plus overage fees. DocuSeal on Opsily is one flat price for unlimited documents, unlimited signatories, unlimited templates. A team of 10 signing 1,000 documents costs the same as signing 10.
Built for teams who need reliability
Deploy in three steps
Get a production-ready eSignature API running before lunch.
Choose Your App
Select an app to get started.
Launch the DocuSeal server
Choose your Opsily plan. DocuSeal boots with automatic SSL, daily backups, and EU data residency. Takes 3 minutes, no credit card upfront.
Test the REST API for free
DocuSeal gives you unlimited sandbox requests. Build and test your signing flows without touching production. Official SDKs for JavaScript, Python, TypeScript available.
Go live with your workflow
Embed signing into your product, integrate with your CRM, or use n8n for no-code automation. Your infrastructure, your compliance audit trail.
DocuSeal on Opsily vs. DocuSign
DocuSign pricing as of 2026. Opsily hosting applies to all plans.
Everything included
No gatekeeping by plan. Every Opsily DocuSeal deployment includes the complete platform.
Simple, transparent pricing
All plans include the full DocuSeal platform, unlimited documents, unlimited signers, and EU hosting. No per-envelope fees. No setup charge.
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Trust & compliance built in
DocuSeal on Opsily meets the strictest data residency and signature standards.
GDPR compliant
German servers, EU data residency by default. Signing data never leaves your infrastructure.
eIDAS/UETA certified
Legally binding signatures in EU and US jurisdictions. Audit trail for compliance, tax, and legal departments.
Open source (MIT license)
Full source code on GitHub. Security audits, customization, and transparency. No proprietary black boxes.
End-to-end encryption
Documents encrypted in transit and at rest. SSL/TLS standard. Optional encryption keys managed by you.
Independent infrastructure
Self-hosted or Opsily-managed. Your data, your keys, your security. Never shared with other tenants.
Frequently asked questions
DocuSeal provides official SDKs for JavaScript, Python, and TypeScript. You can generate signing URLs, send documents for signature, check status, and download signed PDFs via HTTP requests. The sandbox environment is free and unlimited for testing. Opsily handles hosting, SSL, and backups so you focus on your integration logic. See the DocuSeal API documentation for code examples and webhook setup.
Start signing documents without per-user fees
DocuSeal on Opsily is free to try, no credit card required.