Firma.dev
Firma.dev offers an electronic signature API designed specifically for developers and SaaS companies.
Our verdict
Who it's for
Embed legally binding e-signatures into your app
Who should look elsewhere
Priority support is an additional paid add-on.
Pros
- +Extremely low cost per envelope compared to alternatives, with no minimums or contracts.
- +Designed for developers with easy integration, comprehensive API documentation, and pre-built UI components.
- +Supports full white-labeling and team isolation, ideal for SaaS and reseller models.
- +Compliant with major e-signature regulations (ESIGN, UETA, eIDAS, GDPR).
- +Offers unlimited free testing with real documents before incurring costs.
Cons
- −Priority support is an additional paid add-on.
- −May require development resources to integrate the API into existing applications.
Key features
- ✓REST API for e-signatures
- ✓White-labeling and custom branding
- ✓Unlimited team management with data isolation
- ✓Real-time event streaming and webhooks
- ✓Document template creation and management
- ✓Document sending and status tracking
- ✓Audit trails and certificates of completion
- ✓Customer workspaces for isolated data and analytics
Pricing
| Plan | Price | Billing | Notes |
|---|---|---|---|
| Pay-as-you-go | $0.029 | month | Unlimited teams included; Full API access from day one; Test with real documents, free |
| Priority Support | $100 | month | Guaranteed 1 business day response times via email |