SpruceID

SpruceID is a digital identity company founded in 2021 that develops open-source tools and infrastructure for self-sovereign identity and verifiable credentials. Their core product suite includes Credible, a credential lifecycle management platform, and SpruceKit, an open-source toolkit for decentralized identity integration.

The company's technical stack is built around several key components: Their DIDKit library provides cross-platform support for W3C Verifiable Credentials and DIDs, implemented in Rust for performance and security. The platform supports multiple DID methods including did:tezos and did:key, with a focus on privacy-preserving implementations. SpruceID has gained notable adoption through their partnership with the State of California DMV to power their mobile driver's license program using the Credible Platform, which implements the ISO/IEC 18013-5 standard for mobile driver's licenses.

Key technical features include:

• Support for offline verification without issuer phone-home
• Integration with multiple blockchain networks for DID resolution
• Implementation of OpenID Connect SIOP v2
• Cross-platform support through Flutter for mobile applications
• Open-source components under Apache 2.0 license
• Support for JSON-LD and zero-knowledge proofs

The project has received significant backing, raising $41.5M across three funding rounds led by Andreessen Horowitz and other prominent investors. They are active contributors to standards development through participation in W3C working groups, the OpenWallet Foundation, and ISO working groups.