# zama-ai/fhevm

FHEVM, a full-stack framework for integrating Fully Homomorphic Encryption (FHE) with blockchain applications

Repository: https://github.com/zama-ai/fhevm
Canonical: https://ross.abutalabs.com/products/fhevm
Language: Rust
License: NOASSERTION
License Family: other
Topics: blockchain, fhe, privacy
Last push: 2026-08-26T22:41:59+00:00

## Health v2 (maintenance only)
Score: 86/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 98, longevity 34
- inputs: {"age_days": 488, "days_push": 7, "days_rel": 12, "gap_med": 5, "n_releases_24m": 58}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 24825, forks 1771 (observed 2026-08-28T04:11:37.656039+00:00)

## What it is
FHEVM is a full-stack framework from Zama that enables confidential smart contracts on EVM-compatible blockchains using Fully Homomorphic Encryption. It includes Solidity contracts, a Rust-based FHE coprocessor, and KMS connector components so encrypted transaction data and state can be processed directly on-chain.

## Use cases
- build confidential smart contracts with encrypted on-chain state
- process encrypted data on EVM chains without decrypting it
- add end-to-end encrypted transactions to a dApp
- run private DeFi or voting contracts on Ethereum
- integrate FHE coprocessor with an existing blockchain app
- manage encryption keys for confidential contracts via a KMS

## When to choose
- you need on-chain confidentiality that public smart contracts cannot provide
- you are building on EVM-compatible chains and want encrypted state to remain composable
- you want a maintained, well-documented FHE stack with gateway and KMS integration

## When to avoid
- your dApp does not need transaction or state confidentiality
- you need a simple, low-gas solution - FHE computation adds overhead
- you are not targeting EVM-compatible blockchains
- you need a permissively simple license - the license is a custom BSD-3-Clause-Clear variant

## Facets
- artifact type: framework
- maturity: active
- function: cryptography, security, privacy, sdk, middleware
- domain: blockchain, privacy, security, developer-tools
- platform: rust, cross-platform
- tags: fhe, homomorphic-encryption, smart-contracts, evm, confidential-computing, solidity, coprocessor, zama, cryptocurrency, web-server

## Member repositories
- zama-ai/fhevm (main) score 86

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:37.656039+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:56:09.288921+00:00, confidence not recorded.
  - readme: https://github.com/zama-ai/fhevm (fetched 2026-08-28T04:11:37.656039+00:00, sha 1937928f5f8d)
- Data as of 2026-08-30T08:39:29.467469+00:00.