Wikipedia
DocuSign
DocuSign is a San Francisco- and Seattle-based company that provides electronic signature technology and Digital Transaction Management services for facilitating electronic exchanges of contracts and signed documents. DocuSign’s features include authentication services, user identity management and workflow automation. Signatures processed by DocuSign are comparable to traditional signatures based on the product's compliance with the ESIGN Act as well as the European Union’s Directive 1999/93/EC on electronic signatures.
The company has raised $443 million in financing since its founding in 2003.