eduSign is an electronic signature service where you upload PDF or XML documents, have them signed and download the result. Users log in through their own institution's federation (SWAMID or eduGAIN) or with an eduID account, and you can invite others by email to sign. According to Sunet, the service follows the framework for digital signatures of the Swedish Agency for Digital Government (DIGG). The web application consists of a React frontend and a Flask backend, and relies on a separate sign service as its back-end component.
The service is offered by Sunet, the Swedish university network in Stockholm, which is part of the Swedish Research Council. Only organisations with a contract with Sunet can have their own documents signed; invited signers need no contract. The app's source code is open source (BSD-2-Clause) and published on GitHub. Sunet does not state where the servers are physically located; the data controller is the Swedish Research Council.