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.

SelfKey is developing a blockchain-based self-sovereign identity ecosystem. Their decentralized identity management solutions are designed to allow users to better control their personal information, while also facilitating KYC procedures for a variety of purposes. SelfKey's platform revolves around the concept of Proof Of Reputational Stake, which requires users to stake Ethereum-based KEY tokens to participate in the network. Smart contracts release the staked tokens when the user leaves the ecosystem

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.