Smart contract auditors and developers

Audit firms and development studios, filterable by blockchain and service. Each listing states where its information comes from.

13 vendors

Listings marked "Public information" were compiled from the companies' public pages and have not been reviewed by them. They are not partners of smart-contract.com and have not been vetted yet. Verified vendors went through our vetting process.

BootNode
Public information
Web3 development consultancy building smart contracts, dApps and infrastructure for Ethereum teams
- Development
Ethereum · Optimism · ZKsync
Coinspect
Public information
Web3 security firm: smart contract, L1/L2 protocol and source code audits, penetration testing
- Audit
- Penetration testing
Ethereum · BNB Chain · Polygon · Optimism · ZKsync · +2 more
Cyfrin
Public information
Smart contract audits, penetration testing and security education, maker of Aderyn and Solodit
- Audit
- Penetration testing
Ethereum · ZKsync · Arbitrum · Avalanche · BNB Chain · +8 more
Hexens
Public informationUnited Kingdom
Offensive security firm auditing smart contracts, L1/L2 protocols, ZK and cryptography
- Audit
- Penetration testing
Ethereum · Polygon · ZKsync · Aptos
Moonsong Labs
Public informationUnited States
Blockchain engineering firm for institutional protocols, tokenization and payment infrastructure
- Development
Ethereum · ZKsync · Solana · Polkadot
Nethermind
Public informationUnited Kingdom
London blockchain engineering and research firm; its Nethermind Security arm audits smart contracts
- Development
- Audit
Ethereum · Starknet · ZKsync · Solana
Omniscia
Public informationBulgaria
Blockchain security firm auditing Solidity smart contracts, with web-based public reports
- Audit
Ethereum · Polygon · Arbitrum · Base · BNB Chain · +3 more
OpenZeppelin
Public informationUnited Kingdom
Smart contract security audits and the open-source OpenZeppelin Contracts library
- Audit
Ethereum · Arbitrum · Optimism · Base · ZKsync · +2 more
QuillAudits
Public information
Smart contract audit firm also offering dApp penetration testing, wallet audits and monitoring
- Audit
- Penetration testing
Ethereum · NEAR · BNB Chain · Polygon · Optimism · +8 more
RedDuck
Public informationUkraine
Web3 engineering partner writing audit-ready smart contracts on EVM chains, Solana and Bitcoin
- Development
Ethereum · Polygon · BNB Chain · Arbitrum · Base · +6 more
ScaleBit
Public information
Web3 security team auditing smart contracts, dApps and blockchains, with a Bitcoin layer 2 focus
- Audit
Ethereum · Arbitrum · BNB Chain · Solana · Polygon · +3 more
Shieldify
Public informationBulgaria
Bulgarian Web3 security company offering smart contract audits by review or by subscription
- Audit
- Penetration testing
- Development
Ethereum · Solana · ZKsync · Avalanche · BNB Chain · +1 more
Zpoken
Public informationEstonia
Senior crypto engineering team for L1 consensus, zero-knowledge, DeFi mechanisms and stablecoins
- Development
Ethereum · Solana · NEAR · Arbitrum · Base · +1 more

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