Embodiments of the present disclosure disclose gateway facilitating document transactions and related methods. Specifically, the disclosure discloses a gateway facilitating document transactions within a third party workflow. The gateway includes a front-end module and a controller. The front-end module is configured for providing one or more interfaces to a user to perform a document transaction, the one or more interfaces being configured for allowing the user to login into a document banking account of the user; displaying one or more documents available in the document banking account of the user; and allowing the user to select one or more documents for the transaction. The controller, interacting with the front-end module, and being configured for authenticating the third party, and the user for the document transaction; and based on the authentication, transferring the one or more documents selected by the user from the document banking account of the user to a document banking account of the third party.