FranceConnect is the identity service of the French state. It lets people sign in to online public services with an account they already hold, such as one from the tax or health insurance portals, and checks their identity details against the national civil-status register. FranceConnect+ adds stronger verification for sensitive procedures. It is a web service that public-sector services integrate.
FranceConnect is run by the French state, and its service pages credit the Direction interministérielle du numérique (DINUM). According to the service page, FranceConnect does not retain personal data. The public pages reviewed do not state where data is hosted and do not name the GDPR, so a European organisation should check this against the official terms. It is a state service, not a company, and no open-source release has been identified. Its use is tied to French public online services.