Nethermind

Nethermind is a blockchain research and software engineering company founded in 2017, empowering enterprises and developers worldwide to build on decentralized systems. The company received an Ethereum Foundation grant in 2018 to deliver full-client implementation and has become a core contributor to both Ethereum and Starknet ecosystems.

Core Products and Services

Nethermind's work spans the entire Web3 technology stack, from layer 1 and layer 2 engineering to cryptography research, security audits, and application-layer protocol development. The company delivers institutional-grade blockchain solutions, smart contract security services, infrastructure management, open-source developer tools, and cutting-edge research in cryptography, DeFi, and protocol design.

Key offerings include the Nethermind Client (Ethereum execution layer client), Juno (Starknet client), Voyager (Starknet block explorer), comprehensive smart contract auditing services across multiple ecosystems (Solidity, Cairo, Rust, ZK circuits), formal verification, blockchain-as-a-service for institutions, dApp and enterprise engineering, biometric identity solutions, and AI agents infrastructure.

Key Strengths

Nethermind's team comprises over 200 professionals across 66+ countries, with 40% holding Ph.D.s and 145+ published scientific papers. The company has audited over 1 million lines of code, identified 1,700+ vulnerabilities, and maintains deep expertise in Ethereum protocol development, Starknet ecosystem contributions, zero-knowledge cryptography, and institutional blockchain deployment.

As core contributors to Ethereum's development, their execution layer client plays a critical role in advancing the network. Within the Starknet ecosystem, they deliver essential infrastructure including node implementation, block explorer, and developer tooling.

Notable Clients and Projects

Nethermind is trusted by leading institutions and Web3 projects including Deutsche Bank (joint ZKP research paper), Lido (validator infrastructure and security audits), Puffer Finance, Worldcoin, Polygon ID, Gyroscope, Ether.fi, Pragma, and LUKSO. The company actively collaborates with the Ethereum Foundation on critical protocol improvements including EIP-4337 (account abstraction), EIP-4844 (proto-danksharding), Verkle Trees, EOF (Ethereum Object Format), and libp2p implementation in .NET.

Why Choose Nethermind

Nethermind combines academic rigor with production-ready engineering, offering end-to-end support from initial research concepts to successful implementation. Their agile methodology ensures transparent reporting and regular client communication throughout engagements. With proven expertise in securing critical blockchain infrastructure, conducting rigorous security audits (92% of suggested remedies immediately implemented), and contributing foundational open-source tools to Ethereum and Starknet ecosystems, Nethermind serves as a trusted technical partner for enterprises, financial institutions, and Web3 protocols navigating complex regulatory and technical landscapes.