Metadium

Metadium (META) describes itself as 'an identity ecosystem built on a public blockchain to realize the vision of self-sovereign identity'. In addition to user authentication and personal information verification, Metadium reportedly supports management of various aspects of an individual’s digital identity with the "Meta ID" service. Keepin is an application by Metadium that connects service providers and end users through Meta ID. Metadium was founded in early 2018.