DocuSign provides a suite of services designed to help business owners collect electronic signatures and manage digital transactions. With DocuSign, you can send online documents to people who need to sign them, and then collect and manage those signatures.
DocuSign provides RESTful API to integrate to your project, using API, you can send transactional documents and manage thousands of document transaction.
DocuSign embedded integration is another way of integrating docusign, more specifically inside your project using iFrame method.
Check more details from official documentation here:
https://developers.docusign.com/docs/esign-rest-api/esign101/concepts/embedding
