Zama is a cryptography company that builds open source homomorphic encryption tools for developers. Its homomorphic encryption (FHE) is a technology that processes data without decryption. This can be used to create privacy smart contracts on top of public, permissionless blockchains, where only specific users can see transaction data and contract status.

Spruce is a decentralized identity startup that won RFP from the Ethereum Foundation and Ethereum Name Service (ENS) to develop a standardized “Login with Ethereum” feature that enables users to use their Ethereum accounts and ENS profiles to control their identities instead of relying on traditional intermediaries. SpruceID is an open source tool ecosystem that enables user-controlled identities anywhere. Kepler is a decentralized storage system that uses smart contracts to define where your data is stored and who can access it.

Violet is the compliance and identity infrastructure for DeFi. At the heart of this system is a standardized approach to issuing compliance certificates (in the form of non-transferable tokens) and mapping smart contract access controls on the Ethereum network. This combined with elastic authentication (proof of identity) enables the DeFi market to create allowed environments that are accessible only to credential holders as part of the ongoing AML check.

Iron Fish is a layer 1 blockchain designed to be the universal privacy layer for all Web3s. Iron Fish uses zero-knowledge proof (zk-SNARK) and the highest industry encryption standards to enable users to conduct completely private transactions – the true SSL layer of all blockchains. In March 2025, Base acquired the Iron Fish development team and developed privacy protection primitives for Base. The specific acquisition amount has not been disclosed. The acquisition is limited to the Iron Fish team and does not involve the Iron Fish network, tokens or its technology. The Iron Fish project will remain independent and not affiliated with Coinbase or Base.