Adobe Acrobat Sign API vs. Formstack Sign

Acrobat Sign’s APIs allow you to create apps and embed the Acrobat Sign UI and functionality into your applications. Those apps can receive status updates in real-time as well as retrieve and store copies of the signed agreements

Fast and secure digital signatures anywhere. Formstack Sign is a cloud-based electronic signature solution that helps small to large businesses collect e-signatures for document authorization, ensure privacy, and access the system across multiple devices. Offering a host of features, such as customizable templates, a drag-and-drop interface, electronic file conversion, signer redirection/referral, reusable forms, and more, the platform syncs with Google and Outlook to help users import contact information.