Pricing that scales with your usage
All plans include a 3-day free trial. No commitment. Cancel anytime.
Starter
Perfect for trying OpenCorpo or low-volume usage.
- 100 sign operations/month
- 500 verify operations/month
- 30-day asset retention
- 1 API key
- Community support (GitHub)
Professional
Most popularFor growing SaaS products and agencies.
- 5,000 sign operations/month
- 25,000 verify operations/month
- 1-year asset retention
- 5 API keys
- PDF compliance reports
- Webhook notifications
- Email support (48h)
Business
For high-volume platforms with advanced needs.
- 50,000 sign operations/month
- 250,000 verify operations/month
- 3-year asset retention
- 20 API keys
- Bulk upload API
- Custom metadata fields
- Priority email support (24h)
Enterprise
For large organizations with custom requirements.
- Unlimited operations
- Custom retention period
- Custom signing certificates
- On-premise deployment option
- SSO / SAML
- Dedicated support + SLA
- Dedicated account manager
Overage pricing
Your API keeps working past your monthly limit. You're billed for overages on your next invoice.
| Operation | Professional | Business |
|---|---|---|
| Extra sign operation | €0.02 | €0.015 |
| Extra verify operation | €0.004 | €0.003 |
| Report operations | Free | Free |
Frequently asked questions
Each call to POST /v1/sign counts as one operation, regardless of image size.
Your API keeps working. Overages are billed at the rates shown above on your next invoice.
Yes. Upgrades take effect immediately (prorated). Downgrades take effect at the next billing cycle.
Yes — annual billing saves ~20%. Contact us for annual pricing.
All major credit cards via Stripe. Enterprise customers can pay by invoice.
Yes. The Starter plan is free forever — 100 sign operations per month, no credit card required.