Fhenix

Fhenix is a blockchain research and development company building privacy infrastructure based on Fully Homomorphic Encryption (FHE) for EVM-compatible blockchains. FHE allows computations such as addition and multiplication to be performed directly on encrypted data (ciphertext) without decryption, with results remaining encrypted until an authorized party decrypts them. Applied to public blockchains — where transactions, balances and contract state are otherwise fully transparent — this enables smart contracts whose inputs, states and outputs are encrypted while contract logic operates on hidden values.

The company originally launched as an FHE-powered Layer 2 blockchain and has since positioned itself as a confidential DeFi infrastructure provider. Its core product is CoFHE, an FHE coprocessor that performs intensive encrypted computation off-chain and returns encrypted results to EVM chains without decrypting values mid-computation and without relying on trusted hardware. Integration is designed to require no new virtual machine or rollup: developers write standard Solidity and add a single import of the cofhe-contracts FHE library, with Solidity libraries provided for encrypted variables. Stated target use cases include confidential stablecoins, dark pools, vault logic, encrypted trading on AMMs such as Uniswap, lending, tokenized real-world assets, private governance voting, decentralized identity and running AI models on sensitive data, with built-in compliance cited as a design goal.

Business model

Fhenix provides confidentiality as a service: developer-facing FHE infrastructure (the CoFHE coprocessor, Solidity libraries, SDK and tooling) that existing and new EVM applications integrate to add encrypted computation, rather than requiring migration to a separate chain or VM.

Traction

As of the company website, CoFHE is live on the Arbitrum Sepolia, Ethereum Sepolia and Base Sepolia testnets, with mainnet not yet launched. An ecosystem of applications is listed, including Redact (converting tokens into encrypted onchain tokens), an encrypted-balance stablecoin, and Fhenix Pay for transfers that do not reveal amount, sender or recipient, alongside partners in FHE hardware acceleration, DeFi lending, encrypted and shielded trading, data availability and protocol validation.

Latest developments

Fhenix's testnet is live, with CoFHE deployed on Arbitrum Sepolia, Ethereum Sepolia and Base Sepolia; the company is collecting early-access signups ahead of a mainnet launch.