Firma.dev

At €0.029 per envelope (about 3¢), Firma.dev runs about 99% cheaper than DocuSign's API pricing. Pay-as-you-go, no minimums, no contracts. It's built developer-first for startups and SaaS companies: a clean REST API, embeddable template and signing editors, and integration that takes hours instead of weeks. Every customer gets a dedicated workspace, so templates and documents stay separated. Designed to support ESIGN, UETA, HIPAA, GDPR, and eIDAS. Sign up, grab an API key, and start building.