Hey HN! Victor here from SignatureAPI (<a href="https://signatureapi.com" rel="nofollow">https://signatureapi.com</a>)<p>SignatureAPI is an electronic signature platform via API. Our customers use SignatureAPI to add electronic signatures to their apps and workflows.<p>SignatureAPI was born out of the frustration of a friend of mine who needed to integrate electronic signatures into his app, but found Docusign API, at $1+ per envelope, too expensive for his use case. We quickly realized that many others shared this same frustration.<p>We are different from other platforms such as Docusign, Dropbox Sign, Adobe Sign, etc in two key ways:<p>1. API-First. We are focused on the ease of integration and the developer experience (we are proud of our docs). With SignatureAPI, the API is not a second-class citizen to the UI. The API _is_ the product.<p>2. Pricing. Our pricing ranges from $0.10 to $0.25 per envelope. Compare that to Docusign API at $1.25–$4.80, Dropbox Sign API at $1.50–$2.50, or Adobe Sign API at $1.80–$2.50.<p>Our electronic signatures are legally binding in many places, including the US and the EU. The legal foundation of SignatureAPI was developed by a top team of electronic signature lawyers. (And yes, we have the “green checkmark” in Acrobat).<p>We’d love to hear your honest feedback—likes, dislikes, feature requests—whatever you’ve got.