The Cheapest eSignature API for Production: Free Self-Hosted or $11/Month Managed
DocuSeal is the only production-ready eSignature platform that costs nothing to self-host. Or use Opsily's managed hosting at $11/month and skip the ops work. Compare that to $0.75-$1.25 per document from everyone else.
Trusted by fast-moving teams
Why DocuSeal Dominates on Price
Most eSignature APIs charge per document. It adds up fast.
DocuSeal flips the model. Deploy it once. Sign unlimited documents for one fixed cost.
Self-hosted: Zero ongoing cost. You control the infrastructure. Best for teams with 50+ signatures/month and an ops person.
Managed on Opsily: $11-20/month (depending on the plan) for a fully hosted, EU-compliant deployment. No maintenance. No database scaling. That's it.
For comparison: Firma charges €0.029 per envelope. SignatureAPI charges $0.25. BoldSign charges $0.75. DocuSign charges $1.25+. If you sign 100 documents a month on DocuSign, you pay $125. On Opsily's Small plan with DocuSeal, you pay $20 and sign as many as you need.
The math gets worse for competitors as your volume grows. At 1,000 signatures/month: DocuSign = $1,250. Opsily with DocuSeal = $20.
Why Opsily Offers the Cheapest Managed eSignature API
DocuSeal is powerful. But running it yourself means database management, backups, security patches, and scaling concerns. Opsily removes the friction.
No Per-Signature Fees
One monthly price. Sign 10 documents or 10,000, same cost. Compare this to DocuSign's $1.25/doc model and you see why volume-heavy teams save thousands per year. Price is fixed and predictable, no overage shocks.
EU Data Residency & GDPR Compliant
Run DocuSeal on German infrastructure. Your data never leaves the EU. No US transfer agreements. No compliance paperwork with vendors. You own your data outright and can migrate anytime without lock-in.
Production Ready Out of the Box
Managed backups, auto-scaling, SSL certificates, security updates, and 99.9% uptime SLA included. Zero ops burden. DocuSeal handles signing workflows; Opsily handles infrastructure so you focus on product.
Built for teams who need reliability
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
How to Get Started with DocuSeal
Choose your deployment. Set it up. Integrate the API. Done.
Choose Your App
Select an app to get started.
Pick Your Deployment
Go full self-hosted for zero cost, or use Opsily's managed hosting to skip ops. Both use identical DocuSeal code. Choose based on your team's ops capacity.
Configure Templates & Workflows
Upload PDF templates, define signature fields, set up multi-party signing, add webhooks. DocuSeal's UI is intuitive; no code needed for basic setups.
Integrate Your API
Use the REST API or SDKs (PHP, Go, JavaScript available). Send documents, track signature status, retrieve signed PDFs. Full API docs and examples included.
Scale to Production
Opsily handles database scaling and backups automatically. Self-hosted users scale by upgrading their server. Both options support high-volume workflows without cost surprises.
DocuSeal vs. Leading Competitors
Price, control, and production readiness side by side.
Pricing as of May 2026. DocuSign costs vary by tier and add-ons. Opsily costs based on Small ($20/mo) plan.
Opsily Plans for DocuSeal
All plans include DocuSeal, daily backups, SSL, EU hosting, and security updates. Pick the plan that fits your app count.
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Built for Production and Compliance
DocuSeal meets the standards modern teams demand: security, compliance, and control.
GDPR Compliant
EU data residency, automatic right-to-be-forgotten, encryption at rest and in transit. Full compliance documentation available.
eIDAS Regulation Support
Legally binding in the EU under eIDAS. Digital signatures recognized as equivalent to handwritten signatures in all EU member states.
End-to-End Encryption
Documents encrypted in transit and at rest. Only signers can access their copies. Full audit logs for every signature event.
Open Source Transparency
Audit the code yourself. No hidden data collection. Community-reviewed security. Deploy with confidence knowing exactly what runs.
Enterprise-Grade Uptime
99.9% SLA on Opsily. Automatic failover, distributed backups, real-time monitoring. Your signing workflows never go down.
Common Questions About DocuSeal & eSignature Costs
Everything you need to know about choosing the cheapest production API.
Yes. The self-hosted version is completely free, open source, and production-ready. No license fees, no per-document charges, no hidden costs. You deploy it on your own server (or Opsily) and you're done. The DocuSeal Pro license ($240/year) adds team collaboration features and custom branding but is optional. For most production workflows, the free core is all you need.
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
Stop Paying Per Signature. Start With DocuSeal.
Deploy free self-hosted or use Opsily's managed hosting at $11/month. Same platform. Your choice of cost.