Spruce
Decentralized identity and verifiable credential infrastructure
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About Spruce
Spruce, trading as SpruceID, builds open-source tooling and deployments for digital credentials, letting people prove identity with keys they hold rather than a platform account. It maintains DIDKit and SpruceKit, supports W3C verifiable credentials, did:pkh, ISO 18013-5 mobile driving licences and OpenID4VCI/VP, and originated Sign-In with Ethereum, now a common pattern for wallet login. Credentials verify on the device without calling the issuer, so the agency does not learn when or where a credential is used and holders disclose only the fields required. The open libraries issue and verify offline, which suits in-person checks where connectivity is limited.
Its customers are state agencies, enterprises and universities; the Credible platform handles issuance, wallet and in-person verification, and the California DMV mobile licence is the largest deployment, with more than 2 million credentials issued. Unlike identity clouds, the trust root is the issuer's signature rather than a callback to a central database, and revenue comes from tailored deployments and licences.
Spruce's journey began with a $7.5M seed round led by Ethereal Ventures and Electric Capital, enabling the team to build open-source identity toolkits. In early 2022, Spruce completed a Trail of Bits security audit covering its entire software supply chain, a critical milestone for trust in decentralized identity. The company actively contributed to the Sign-In with Ethereum (EIP-4361) standard, collaborating with the Ethereum Foundation and ENS to create an open login specification. Spruce launched SSX (Sign-In with Ethereum + SIWE + X) as a modular developer library, reducing integration code by up to 80% and adding features like session keys and data vaults. Kepler, a decentralized storage solution, was introduced with a Rust SDK and WASM bindings, enabling private data sharing via Web3 wallets. The company also developed Credible, a whitelabel mobile app for credential lifecycle management, and Tezos Profiles, which surpassed 21,000 deployed profiles to prevent NFT fraud. These milestones established Spruce as a key architect of user-controlled identity and data standards.
On 6 May 2026 Utah's S.B. 275 took effect, putting the state-endorsed digital identity framework known as SEDI into force, with SpruceID as the main technology supplier. The statute writes eleven individual rights into law first and then requires wallets and verifiers to build around them, barring state agencies from monitoring how credentials are presented.
In deployment, SpruceID supplies issuance, wallet and verification components for California's mobile driver's licence, which passed four million credentials in August, the largest programme of its kind in the United States. A September joint FinCEN ruling confirmed that government-issued mobile licences qualify as documentary identification for bank onboarding, opening a high-volume compliance channel, while the Kantara Initiative became organisational home to a multi-state SEDI consortium with more than 20 states in discussion. Writing rights into statute rather than only into a technical spec is what separates this framework from earlier DID work: verifiers cannot record who presented what and when, only whether the proof holds, which turns identity from trackable into minimally disclosable. The hard part is interstate recognition and offline verification, where a credential must still prove itself with no network.
Spruce spreads the model statute to more states, completes offline-verifiable trust infrastructure, and connects bank and brokerage KYC flows directly to mobile credentials.
Wayne Chang — Co-founder & CEO; former product lead at ConsenSys and CTO of Concierge/Stat.
Gregory Rocco — Co-founder & CPO; former product strategy lead and token engineer at ConsenSys. The two founded Spruce in 2020 and led development of the Sign-In with Ethereum standard (EIP-4361).