Metadium is developing a blockchain protocol for Self-Sovereign Identity. Their goal is to allow users to own all aspects of their identity. Metadium's network is powered by the Ethereum-based META token.

BidiPass is a blockchain-based identity authentication platform. The BidiPass security protocol is built on top of the Ethereum blockchain and is designed to provide an additional level of security for users while maintaining the user experience of an App or device. BidiPass can be integrated across multiple devices and uses encrypted biometric data to enhance identity authentication security.