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

Civic is developing a Secure Identity Platform (SIP) that will allow users to store and secure their digital identities on their mobile phones, similar to a digital wallet. Civic's blockchain-based architecture, combined with biometrics on mobile devices, enable users to better control their digital identities.
Civic is working to provide businesses and individuals the necessary tools to control and protect identities. The company offers a variety of decentralized identity solutions, including: secured login and registration services, decentralized KYC services, and secure identity services for ICOs.