Firma.dev

Firma.dev is a pay-as-you-go e-signature API built for developers, agencies, and businesses that don't want to pay per seat. You get an embeddable signing editor, template management, and customer workspaces for clean separation between clients, plus a no-code sending option for teams that don't need to touch the API.

Pricing is per envelope: €0.049 (about 5 cents USD), with no monthly minimums, no seat fees, and no upfront cost. SaaS teams use the API to add signing without pulling engineers off the core product for weeks. Agencies use bulk send and per-client separation to keep costs flat as their client list grows. Internal teams use the no-code flow to get contracts signed without waiting on a developer.

Firma.dev is designed to support ESIGN, UETA, eIDAS (SES and AdES), and GDPR requirements, and is legally valid in 55+ countries. Get started for free, no credit card required.