The only free esignature api production tier that doesn't trap you
Stop paying $25 per month for restricted developer plans. Build your app with DocuSeal's unlimited free sandbox and move to production for $0.20 per document on Opsily.
Trusted by fast-moving teams
Why your 'free' API tier is a trap
Most eSignature providers offer a developer sandbox. It looks great until you want to go live.
Then the reality sets in: a $25 base fee just to send your first document. If you don't use your full 'envelope' quota, you still pay. If you go over, you face massive overage fees.
DocuSeal handles this differently. It is open-source. You get an unlimited free developer sandbox. When you are ready for a production tier, Opsily hosts it on dedicated German infrastructure. You get professional features without the SaaS tax.
Developer-first eSignatures
- Production Ready: Direct API access with SDKs for Ruby, Go, Python, and Node.js.
- No Credit Card Required: Build and test your entire integration in the sandbox for free.
- Pay for Use: Move to a flat per-document rate that scales only when your app grows.
Stop the per-user price gouging
DocuSeal on Opsily vs. the legacy SaaS giants.
Based on public pricing for DocuSign Basic and Opsily Small plans.
EUR 800 a year for tools that used to cost us multiples of that. We replaced HubSpot, Make.com, and our password manager with self-hosted apps on Opsily. One provider, one fee.
Franz Koller
Co-Founder · Joy
Managed DocuSeal: The best way to run your free esignature api production tier
We take the friction out of self-hosting so you can focus on your code.
German Data Sovereignty
All documents are stored in Frankfurt, Germany. This ensures 100% GDPR compliance and eIDAS compatibility for legally binding signatures in the EU.
Instant SDK Connectivity
Deploy your instance in 3 minutes. Your API keys and webhooks are ready to use immediately.
Automatic Maintenance
We handle the PostgreSQL backups, security patches, and server scaling. You get a production-grade eSignature API without the DevOps overhead.
Built for teams who need reliability
Go live in four simple steps
Select DocuSeal
Choose DocuSeal from the Opsily app catalog and pick your server region.
Configure API
Generate your API key and set up webhooks for real-time signature updates.
Test with Sandbox
Use the free developer mode to test your integration without spending a cent.
Switch to Production
Turn on your production tier and start sending legally binding documents.
Transparent costs for every stage
Start small and grow. No hidden fees. No envelope traps.
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Need more resources or custom solutions?
Compliant by default
GDPR Compliant
German data centers and strict data processing agreements keep you legal.
eIDAS Certified
Digital signatures that are legally binding across the European Union.
SOC2 Infrastructure
Our underlying hardware meets rigorous international security standards.
Full Encryption
Data is encrypted at rest and in transit using industry-standard AES-256.
API & Production Tier Questions
DocuSeal provides a completely free, unlimited developer sandbox for as long as you need to build your integration. When you move to the production tier on Opsily, you eliminate standard monthly subscription fees and pay a flat $0.20 per document. This is the most cost-effective way to run a production-grade eSignature API without the high entry costs of legacy SaaS providers.
What our customers say
Teams across the EU run their stack on Opsily. Here is what that looks like in practice.
EUR 800 a year for tools that used to cost us multiples of that. We replaced HubSpot, Make.com, and our password manager with self-hosted apps on Opsily. One provider, one fee.
Franz Koller
Co-Founder • Joy
We were paying per user on everything and it added up fast. Now we run five apps for less than one of those old plans. My finance team finally stopped asking questions.
Elise
Head of Operations
Wanted to use n8n for ages but the self-host part always stopped me. Opsily just handled it. Got the power without becoming an IT person overnight.
Federica B.
Automation Consultant
Build your eSignature workflow today
Join 171,100+ businesses using DocuSeal. Deploy your managed production instance on Opsily in minutes.